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SECTION 23 21 13
HYDRONIC PIPING
 
 
Copyright 2014 - 2016 ARCAT, Inc. - All rights reserved
** NOTE TO SPECIFIER ** Uponor; plumbing piping, hydronic distribution, radiant heating and cooling.
This section is based on the products of Uponor which is located at:
5925 148th Street West
Apple Valley, MN 55124
Toll Free Tel: (800) 321-4739
Tel: (952) 891-2000
Fax: (952) 891-2008
Email:
Web: http://www.uponorpro.com
click Herefor additional information
With over 40 years of performance in structures around the globe, Uponor is the professional's choice for commercial plumbing, hydronic distribution and radiant heating and cooling systems. Using technologies proven in the most demanding environments, Uponor has perfected the art of providing systems that exceed expectations and deliver consistent quality for decades of use.
Get Uponor product data, in the right formats, in the places, to quickly and accurately design and estimate your PEX-a plumbing, radiant heating/cooling and hydronic distribution piping project. 2D/3D CAD files and BIM files in multiple platforms are available at www.uponorpro.com/catalog.
 
PART 1 GENERAL
 
1.1
SECTION INCLUDES
 
** NOTE TO SPECIFIER ** Delete system types not required.
 
A.
Hydronic Piping and Fittings (PEX-a) for the Following Applications:
1.
Hot-water heating piping, above ground.
2.
Hot-water heating piping installed below ground and within slabs.
3.
Chilled-water piping, above ground.
4.
Chilled-water piping installed below ground and within slabs.
5.
Condenser-water piping.
6.
Makeup-water piping, above ground.
7.
Makeup-water piping installed below ground and within slabs.
B.
Flexible Pre-Insulated Pipe Distribution System (ASTM Ecoflex) for Hot and Cold Fluids:
1.
Potable HDPE distribution system.
2.
Potable PEX-a distribution system.
3.
Thermal single distribution system.
4.
Thermal twin distribution system.
1.2
RELATED SECTIONS
 
** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required
 
A.
Section 22 11 13 - Facility Water Distribution Piping.
B.
Section 23 21 13 - Hydronic Piping.
1.3
REFERENCES
 
** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
 
A.
ASTM International (ASTM):
1.
ASTM F714 - Standard Specification for Polyethylene (PE) Plastic Pipe (SDR-PR) Based on Outside Diameter
2.
ASTM D3350 - Standard Specification for Polyethylene Plastics Pipe and Fittings Materials.
B.
American National Standards Institute (ANSI)/American Water Works Association (AWWA)
1.
ANSI/AWWA C901 AWWA Standard for Polyethylene (PE) Pressure Pipe and Tubing, 1/2 inch (13 mm) Through 3 inch (76 mm), for Water Service
2.
ANSI/AWWA C906 AWWA Standard for Polyethylene (PE) Pressure Pipe and Fittings, 4 inch (100 mm) Through 63 inch (1575 mm), for Water Distribution.
C.
American Standards Institute (ANSI)/National Sanitation Foundation (NSF): ANSI/NSF 61 Drinking Water System Components - Health Effects
D.
International Code Council (ICC): International Plumbing Code (IPC)
E.
International Association of Plumbing and Mechanical Officials (IAPMO): Uniform Plumbing Code (UPC)
F.
Plastic Pipe Institute (PPI): PE 3408/PE 3608 IPS Geothermal Pipe Specifications
G.
Uponor, Inc.: Uponor Pre-insulated Pipe Systems Design and Installation Manual, current edition
1.4
SUBMITTALS
A.
Submit under provisions of Section 01 30 00 - Administrative Requirements.
B.
Product Data: Submit manufacturer's product submittal data and installation instructions.
C.
Shop Drawings: Provide installation drawings indicating: piping layout, size dimension by installation segment, vault locations, support fixtures and schedules with all details required for installation of the system.
D.
Samples: Submit selection and verification samples of piping.
E.
Quality Assurance/Control Submittals
1.
Test Reports: Upon request, submit test reports from recognized testing laboratories.
2.
Submit the following documentation.
a.
Manufacturer's certificate stating that products comply with specified requirements.
b.
Manufacturer's flow schedule for the distribution system.
c.
Documentation that the installer is trained to install the manufacturer's products
F.
Closeout Submittals: Submit the following documents.
1.
Warranty documents specified herein.
2.
Operation and maintenance data.
3.
Manufacturer's field reports specified herein.
4.
Final as-built piping layout drawing.
1.5
QUALITY ASSURANCE
A.
Installer Qualifications: Use an installer with demonstrated experience on projects of similar size and complexity and possessing documentation proving familiarization training by the tubing manufacturer.
 
** NOTE TO SPECIFIER ** Paragraph below should list obligations for compliance with specific code requirements particular to this section. Typically, general statements to comply with a particular code are addressed in Conditions of the Contract and Division 1 Regulatory Requirements Section. Avoid repetitive statements.
 
1.
Regulatory Requirements and Approvals: Ensure the piping distribution system complies with all applicable codes and regulations.
2.
Certifications: Provide letters of certification indicating: Installer uses skilled workers holding a trade qualification license or equivalent, or apprentices under the supervision of a licensed trades person.
 
** NOTE TO SPECIFIER ** Retain paragraph below if pre-installation meeting is required.
 
3.
Pre-installation Meetings:
a.
Verify project requirements, excavation conditions, system performance requirements, manufacturer's installation instructions and warranty requirements.
b.
Review project construction timeline to ensure compliance or discuss modifications as required.
c.
Interface with other trade representatives to verify areas of responsibility.
d.
Establish the frequency and construction phase the project engineer intends for site visits and inspections by the tubing manufacturer's representative.
 
** NOTE TO SPECIFIER ** Article below should include specific protection and environmental conditions required during storage. Coordinate article below with Division 1 Product Requirements Section.
 
1.6
DELIVERY, STORAGE and HANDLING
A.
General: Comply with Division 1 Product Requirement Section.
B.
Comply with manufacturer's ordering instructions and lead-time requirements to avoid construction delays.
C.
Delivery: Deliver materials in manufacturer's original, unopened, undamaged containers with identification labels intact.
D.
Storage and Protection: Store materials protected from exposure to harmful environmental conditions and at temperature and humidity conditions recommended by the manufacturer.
1.
Store potable pre-insulated piping coils under cover to prevent dirt or foreign material from entering the service tubing.
2.
Do not expose the service pipe to direct sunlight for more than 30 days. If construction delays are encountered, cover piping that is exposed to direct sunlight.
 
** NOTE TO SPECIFIER ** Coordinate article below with Conditions of the Contract and with Division 1 Closeout Submittals (Warranty) Section. Use this article to require special or extended warranty or bond covering the work of this section.
 
1.7
WARRANTY
A.
Manufacturer's Warranty for Hydronic Piping: Manufacturer's standard 25 year warranty for PEX-a piping and ASTM F 1960 fittings.
B.
Manufacturer's Warranty for Pre-Insulated Pipe Distribution Systems: Submit, for owner's acceptance, USA manufacturer's standard 5-year warranty document executed by authorized company official. Manufacturer's warranty is in addition to, and not a limitation of, other rights owner may have under contract documents.
1.
Warranty covers the repair or replacement of any piping or fittings proven defective.
2.
Warranty may transfer to subsequent owners.
3.
The most recent limited warranty published by the manufacturer takes precedence at the time of installation.
PART 2 PRODUCTS
 
2.1
MANUFACTURERS
A.
Acceptable Manufacturer: Uponor , which is located at: 5925 148th St. W.; Apple Valley, MN 55124; Toll Free Tel: 800-321-4739; Tel: 952-891-2000; Fax: 952-891-2008; Email: request info (daniel.worm@uponor.com); Web: www.uponorengineering.com | www.uponorengineering.com
 
** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.
 
B.
Substitutions: Not permitted.
C.
Requests for substitutions will be considered in accordance with provisions of Section 01 60 00 - Product Requirements.
2.2
HYDRONIC PIPING AND FITTINGS (PEX-a)
A.
Performance Requirements: PEX-a piping and fittings shall meet the following pressure and temperature ratings:
1.
200 degrees F (93 degrees C) at 80 psi (551 kPa).
2.
180 degrees F (82 degrees C) at 100 psi (689 kPa).
3.
73.4 degrees F (23 degrees C) at 160 psi (1,102 kPa).
B.
Plastic Pipe and Fittings:
1.
PEX-a (Engle-method Crosslinked Polyethylene) Piping: Uponor Wirsbo hePEX , ASTM 876 with oxygen-diffusion barrier that meets DIN 4726.
2.
PEX-a Fittings, Elbows and Tees (1/2 inch through 3 inch nominal pipe size): ASTM F1960 cold-expansion fitting manufactured from the following material types:
a.
UNS No. C69300 Lead-free (LF) Brass.
b.
20 percent glass-filled polysulfone as specified in ASTM D6394.
c.
Unreinforced polysulfone (group 01, class 1, grade 2) as specified in ASTM D6394.
d.
Polyphenylsulfone (group 03, class 1, grade 2) as specified in ASTM D6394
e.
Blend of polyphenylsulfone (55-80%) and unreinforced polysulfone (rem.) as specified in ASTM D6394.
f.
Reinforcing cold-expansion rings shall be manufactured from the same source as PEX-a piping manufacturer and marked "F1960".
 
** NOTE TO SPECIFIER ** Do not specify engineered polymer (EP) polyphenylsulfone fittings for systems that contain ethylene glycol.
 
3.
PEX-a Fittings (1 inch through 4 inch nominal pipe size): SDR9 compression type fitting consisting of a double O-ring insert with a compression sleeve tightened around the pipe and insert.
C.
Plastic-to-Metal Transition Fittings:
1.
Manufacturer: Provide fittings from the same manufacturer of the piping.
2.
Threaded Brass to PEX-a Transition: One-piece brass fitting with male or female threaded adapter and F1960 cold-expansion end, with PEX-a reinforcing cold-expansion ring. Typically used for PEX sizes 3 inch and below.
3.
Brass Sweat to PEX-a Transition: One-piece brass fitting with sweat adapter and F1960 cold-expansion end, with PEX-a reinforcing cold-expansion ring. Typically used for PEX sizes 3 inch and below.
4.
Dezincification-resistant (DZR) Brass to PEX-a Transition: Male NPT thread and PEX compression fitting. Editor: Typically used for PEX sizes 1 inch through 4 inch.
D.
Plastic-to-Metal Transition Unions:
1.
Manufacturer: Provide unions from the same manufacturer of the piping.
2.
Threaded Brass to PEX-a Union: One-piece brass fitting with male or female threaded adapter and F1960 cold-expansion end, with PEX-a reinforcing cold-expansion ring. Typically used for PEX sizes 3 inch and below.
3.
Brass Sweat to PEX-a Union: One-piece brass fitting with sweat adapter and F1960 cold-expansion end, with PEX-a reinforcing cold-expansion ring. Typically used for PEX sizes 3 inch and below.
E.
Piping Applications:
1.
Hot-water heating piping, aboveground (3 inch and below) shall be the following: PEX-a piping, with F1960 cold-expansion fittings.
2.
Hot-water heating piping, aboveground (3-1/2 inch through 4 inch) shall be the following: PEX-a piping, with compression fittings.
3.
Hot-water heating piping installed below ground and within slabs shall be any of the following:
a.
3 inch and below: Sleeved PEX-a piping with engineered polymer (EP) polyphenylsulfone F1960 cold-expansion fittings. Use the fewest possible joints and install per manufacturer's recommendations.
b.
1 inch through 2 inch: Pre-insulated PEX-a piping with multi-layer, closed-closed cell PEX-foam insulation and a corrugated HDPE jacket with engineered polymer (EP) polyphenylsulfone F1960 cold-expansion fittings. Use the fewest possible joints and install per manufacturer's recommendations.
c.
1 inch through 4 inch: Pre-insulated PEX-a piping with multi-layer, closed-cell, PEX-foam insulation and a corrugated HDPE jacket with compression fitting. Use the fewest possible joints and install per manufacturer's recommendations.
4.
Chilled-water piping, aboveground (3 inch and below) shall be the following: PEX-a piping, with F1960 cold-expansion fittings.
5.
Chilled-water piping, aboveground (3-1/2 inch through 4 inch) shall be the following: PEX-a piping, with compression fittings.
6.
Chilled-water piping installed below ground and within slabs shall be any of the following:
a.
3 inch and below: Sleeved PEX-a piping with engineered polymer (EP) polyphenylsulfone F1960 cold-expansion fittings. Use the fewest possible joints and install per manufacturer's recommendations.
b.
1 inch through 2 inch: Pre-insulated PEX-a piping with multi-layer, closed-closed cell PEX-foam insulation and a corrugated HDPE jacket with engineered polymer (EP) polyphenylsulfone F1960 cold-expansion fittings. Use the fewest possible joints and install per manufacturer's recommendations.
c.
1 inch through 4 inch: Pre-insulated PEX-a piping with multi-layer, closed-closed cell PEX-foam insulation and a corrugated HDPE jacket with compression fitting. Use the fewest possible joints and install per manufacturer's recommendations.
7.
Condenser-water piping, aboveground (3 inch and below) shall be the following: PEX-a piping, with F1960 cold-expansion fittings.
 
** NOTE TO SPECIFIER ** Consult PEX manufacturer regarding water treatment system when specifying PEX for condenser water applications.
 
8.
Condenser-water piping, aboveground (3-1/2 inch through 4 inch) shall be the following: PEX-a piping, with compression fittings.
9.
Condenser-water piping installed below ground and within slabs shall be any of the following:
a.
3 inch and below: Sleeved PEX-a piping with engineered polymer (EP) polyphenylsulfone F1960 cold-expansion fittings. Use the fewest possible joints and install per manufacturer's recommendations.
b.
1 inch through 2 inch: Pre-insulated PEX-a piping with multi-layer, closed-closed cell PEX-foam insulation and a corrugated HDPE jacket with engineered polymer (EP) polyphenylsulfone F1960 cold-expansion fittings. Use the fewest possible joints and install per manufacturer's recommendations.
c.
1 inch through 4 inch: Pre-insulated PEX-a piping with multi-layer, closed-closed cell PEX-foam insulation and a corrugated HDPE jacket with compression fitting. Use the fewest possible joints and install per manufacturer's recommendations.
10.
Makeup-water piping, aboveground (3 inch and below) shall be the following: PEX-a piping, with F1960 cold-expansion fittings.
11.
Makeup-water piping, aboveground (3-1/2 inch through 4 inch) shall be the following: PEX-a piping, with compression fittings.
12.
Makeup-water piping installed below ground and within slabs shall be any of the following:
a.
3 inch and below: Sleeved PEX-a piping with engineered polymer (EP) polyphenylsulfone F1960 cold-expansion fittings. Use the fewest possible joints and install per manufacturer's recommendations.
b.
1 inch through 2 inch: Pre-insulated PEX-a piping with multi-layer, closed-closed cell PEX-foam insulation and a corrugated HDPE jacket with engineered polymer (EP) polyphenylsulfone F1960 cold-expansion fittings. Use the fewest possible joints and install per manufacturer's recommendations.
c.
1 inch through 4 inch: Pre-insulated PEX-a piping with multi-layer, closed-closed cell PEX-foam insulation and a corrugated HDPE jacket with compression fitting. Use the fewest possible joints and install per manufacturer's recommendations.
2.3
ASTM ECOFLEX POTABLE HPDE DISTRIBUTION SYSTEM
 
** NOTE TO SPECIFIER ** Article below should be restricted to statements describing design or performance requirements and functional (not dimensional) tolerances of a complete system. Limit descriptions to composite and operational properties required to link components of a system together and to interface with other systems.
 
A.
Design Requirements: The potable HDPE service piping is USA manufactured and tested in accordance with ASTM F714, PE 3408, PE 3608 and AWWA C901/C906 standards. This product is listed with NSF/ANSI 61 or NSF-pw. The potable HDPE service piping has hydrostatic ratings in accordance with the temperatures and pressures listed in the ASTM standard. The hydrostatic ratings are:
1.
-30 degrees F to 73 degrees F at 160 psig (-34 degrees C to 23 degrees C at 1103 kPA).
2.
-30 degrees F to 100 degrees F at 125 psig (-34 degrees C to 38 degrees C at 862 kPA).
3.
-30 degrees F to 120 degrees F at 101 psig (-34 degrees C to 49 degrees C at 696 kPA).
4.
-30 degrees F to 140 degrees F at 80 psig (-34 degrees C to 60 degrees C at 552 kPA).
B.
Performance Requirements: Provide a potable HDPE distribution system that is USA manufactured, fabricated and installed to comply with regulatory agencies and authorities with jurisdiction, and that maintains performance criteria stated by the tubing manufacturer without defects, damage or failure.
1.
Show compliance with ASTM F714 for Polyethylene (PE) Plastic Pipe (SDR-PR) Based on Outside Diameter.
2.
Show compliance with ANSI/AWWA C901 for Polyethylene (PE) Pressure Pipe and Fittings (for 3-inch or less piping).
3.
Show compliance with ANSI/AWWA C906 for Polyethylene (PE) Pressure Pipe and Fittings (for 4-inch piping).
4.
Show compliance with NSF/ANSI 61 or NSF-pw regarding Drinking Water System Components.
5.
Show compliance with PE 3408 and PE 3608 for Geothermal Pipe Requirements.
C.
Service Tubing:
1.
Material: High-density polyethylene (HDPE) manufactured to NSF-certified SDR-11.
2.
Material Standard: Manufactured in accordance with ASTM F714, AWWA C906, PE 3408, PE 3608 (or PE 3454) and NSF 61.
3.
Pressure Ratings: Hydrostatic design and pressure ratings are in accordance with AMST standards; operating limits stated in System Description Article (1.03).
4.
Nominal Inside Diameter: Provide tubing with nominal inside diameter in accordance with ASTM F714, as indicated. Note: Numbers in brackets are the metric equivalent pipe size.
a.
3/4 inch (20mm).
b.
1 inch (25mm).
c.
1-1/4 inch (32mm).
d.
1-1/2 inch (40mm).
e.
2 inch (50mm).
f.
3 inch (90mm).
g.
4 inch (110mm).
D.
Outer Jacket:
1.
Material: Corrugated seamless high-density polyethylene (HDPE)
2.
The HDPE jacket completely encompasses and protects the insulation from moisture and damage.
3.
Outer jacket shall be extruded directly over the insulation and is flexible.
 
** NOTE TO SPECIFIER ** Specify materials to be furnished. This article lists product by the inside nominal dimension which is common in ASTM dimensioned tubing.
 
4.
Minimum Bend Radius:
a.
3/4 inch pre-insulated potable HDPE tubing with 2.7-inch (68mm) jacket has a bend radius of 10 inches (254mm).
b.
1 inch pre-insulated potable HDPE tubing with 2.7-inch (68mm) jacket has a bend radius of 12 inches (304mm).
c.
1-1/4 inch pre-insulated potable HDPE tubing with 5.5-inch (140mm) jacket has a bend radius of 14 inches (356mm).
d.
1-1/2 inch pre-insulated potable HDPE tubing with 5.5-inch (140mm) jacket has a bend radius of 18 inches (457mm).
e.
2 inch pre-insulated potable HDPE tubing with 5.5-inch (140mm) jacket has a bend radius of 30 inches (762mm).
f.
3 inch pre-insulated potable HDPE tubing with 6.9-inch (175mm) jacket has a bend radius of 32 inches (812mm).
g.
4 inch pre-insulated potable HDPE tubing with 7.9-inch (200mm) jacket has a bend radius of 48 inches (1219mm).
5.
The outer jacket shall contain 2 percent carbon black, finely divided and thoroughly dispersed to provide protection from UV degradation.
E.
Insulation:
1.
The insulation shall be layered expanded crosslinked water-resistant polyethylene closed-cell foam.
2.
All seams of the insulation shall be sealed.
3.
Insulation shall not be bonded to the service tubing.
F.
End Seals:
1.
The piping manufacturer will supply all EPDM rubber end caps with water-stop seal.
2.
EPDM rubber end caps are to be installed on each end prior to connecting the service pipes and insulating the field joints.
3.
The EPDM end caps will seal onto the tubing and outer jacket forming a watertight seal.
 
** NOTE TO SPECIFIER ** Two fitting programs are available for the potable HDPE Service Tubing. Normally one fitting type is specified on the project. In this case, delete the other fitting reference. It is acceptable to specify both fittings allowing the installing contractor to choose the type of fitting used. For standardization purposes, the installing contractor should then only use one type of fitting for the installation.
 
G.
Fitting Products for 3-inch and Smaller Pipe per AWWA C901:
1.
Butt Fusion Fittings - Fittings shall be made of 3408 Polyethylene material (PE3408), PE3608 or PE3454. Butt Fittings shall meet the requirements of ASTM D3350, CSA B137.1, NSF 14 and NSF 61. Molded and fabricated fittings shall have a pressure rating equal to the pipe unless otherwise specified in the plans. All fittings shall meet the requirements of AWWA C901.
2.
Electrofusion Fittings - Fittings shall be PE 3408, PE3608 or PE3454 and meet requirements of ASTM D3350, CSA B137.1, NSF 14 and NSF 61. Fittings shall have a pressure rating of equal to the pipe unless otherwise specified in the plans.
3.
Flanges and Mechanical Joint Adapters - Flanges and Mechanical Joint Adapters shall be made of PE 3408, PE3608 or PE3454 and meet requirements of ASTM D3350, CSA B137.1, NSF 14 and NSF 61. Flanges and Mechanical Joint Adapters shall have a pressure rating equal to the pipe unless otherwise specified on the plans.
4.
Service connections shall be electrofusion saddles with a brass or stainless steel threaded outlet, electrofusion saddles, sidewall fusion (branch) saddles, tapping tees or mechanical saddles.
a.
For electrofusion saddles with threaded outlet, the size of the outlet shall be 1-inch IPS unless a larger size is shown on the plans and shall be made of materials stated above (Article number 2.03.E.2).
b.
For sidewall fusion saddles, the size of the saddle shall be as indicated on the plans. The saddle can be made according to ASTM D3350, ASTM D3261 or ASTM F2206. After installation, approximately 1/4-inch of the PE pipe shall be visible beyond the saddle to confirm that proper surface preparation occurred. Saddle faces that do not provide 1/4-inch of area beyond the saddle are not acceptable.
c.
Tapping tees shall be made to ASTM D3261 or D2683.
d.
Mechanical strap-on saddles can only be used when approved by mechanical saddle manufacturer. The body of the saddle shall be stainless steel or brass. The gasket material and design must be acceptable for PE pipe. The outlet shall be threaded for 1-inch IPS unless a larger size is shown on the plans. Mechanical strap-on saddles will be installed according to manufacturer's instructions.
5.
Heat fusion is the preferred method for joining these pipes. All buried fittings will be installed, insulated and sealed in accordance with the instructions of the manufacturer.
H.
Fitting Products for 4-inch and Larger Pipe per AWWA C901:
1.
Butt Fusion Fittings - Fittings shall be made of HDPE material that has been NSF certified SDR-11 with a minimum material designation code of PE3408. Molded and fabricated fittings shall have a pressure rating equal to the pipe unless otherwise specified on the plans. All fittings shall meet the requirements of AWWA C906.
2.
Electrofusion Fittings - Fittings shall be made of HDPE material that has been NSF certified SDR-11 with a minimum material designation code of PE3408. Electrofusion fittings shall have a manufacturing standard of ASTM F1055 and shall have a pressure rating equal to the pipe unless otherwise specified on the plans. All electrofusion fittings shall be suitable for use as pressure conduits, and have nominal burst values of four times the Working Pressure Rate (WPR) of the fitting. Markings shall be according to ASTM F1055.
3.
Flanges and Mechanical Joint Adapters - Flanges and Mechanical Joint Adapters shall have a material designation code of PE3408 or higher and meet requirements of ASTM D3350, CSA B137.1, NSF 14 and NSF 61. Flanges and Mechanical Joint Adapters shall have a pressure rating equal to the pipe unless otherwise specified on the plans.
4.
Service connections shall be electrofusion saddles with a brass or stainless steel threaded outlet, electrofusion saddles, sidewall fusion (branch) saddles, tapping tees or mechanical saddles.
a.
For electrofusion saddles with threaded outlet, the size of the outlet shall be 1-inch IPS unless a larger size is shown on the plans and shall be made of materials stated above (2.03/E/2).
b.
For sidewall fusion saddles, the size of the saddle shall be as indicated on the plans. The saddle can be made according to ASTM D3350, ASTM D3261 or ASTM F2206. After installation, approximately 1/4-inch of the PE pipe shall be visible beyond the saddle to confirm that proper surface preparation occurred. Saddle faces that do not provide 1/4-inch of area beyond the saddle are not acceptable.
c.
Tapping tees shall be made to ASTM D3261 or ASTM D2683.
d.
Mechanical strap-on saddles can only be used when approved by mechanical saddle manufacturer. The body of the saddle shall be stainless steel or brass. The gasket material and design must be acceptable for HDPE pipe. The outlet shall be threaded for 1-inch IPS unless a larger size is shown on the plans. Mechanical strap-on saddles will be installed according to manufacturer's instructions.
5.
Heat fusion is the preferred method for joining these pipes. All buried fittings will be installed, insulated, and sealed in accordance with the instructions of the manufacturer.
I.
Pipe and Fitting Identification: The pipe shall be marked in accordance with the standards to which it is manufactured.
1.
Color identification by the use of stripes on pipe to identify pipe service shall be optional. If used, stripes or colored exterior pipe product shall be blue for potable water, green for wastewater/sewage, or purple for reclaimed water.
2.
Tracing wire shall be placed parallel and 18 inches above, but separate from, the pipe and shall be 10 AWG.
 
** NOTE TO SPECIFIER ** Delete marking tape below if not required.
 
3.
Marking tape shall be approved by the engineer and placed between 12 and 18 inches above the crown of the pipe.
J.
Accessories: Use accessories associated with the installation of the piping system as recommended by or available from the manufacturer.
K.
Insulation Kits: Insulation kits will be manufactured of ABS shells or HDPE sleeves, will feature equal thickness of closed-cell PEX insulation as the pipe, and sealed watertight.
L.
Connection Vaults:
1.
The piping manufacturer will provide the connection vaults when required by the project construction.
2.
Connection vaults shall be constructed of rotationally molded composite polyethylene and PE foam, providing a structurally sound and thermally insulated chamber.
3.
Heat shrink seals as provided by the tubing manufacturer shall be installed to prevent introduction of water into the vault.
M.
Anchors: The project engineer will determine the use of anchors, if required, within the distribution system.
2.4
ASTM ECOFLEX POTABLE PEX DISTRIBUTION SYSTEM
 
** NOTE TO SPECIFIER ** Article below should be restricted to statements describing design or performance requirements and functional (not dimensional) tolerances of a complete system. Limit descriptions to composite and operational properties required to link components of a system together and to interface with other systems.
 
A.
Design Requirements: The potable PEX-a service tubing is USA manufactured and tested in accordance with ASTM F876, ASTM F877, CSA B137.5 and NSF-pw. The potable PEX-a service tubing has hydrostatic ratings in accordance with the temperatures and pressures listed in the ASTM standard. The hydrostatic ratings are:
1.
200 degrees F (93 degrees C) at 80 PSI (551 kPa).
2.
180 degrees F (82 degrees C) at 100 PSI (689 kPa).
3.
73.4 degrees F (23 degrees C) at 160 psi (1102 kPa).
B.
Performance Requirements: Provide a pre-insulated potable distribution system that is USA manufactured, fabricated and installed to comply with regulatory agencies and authorities with jurisdiction, and that maintains performance criteria stated by the tubing manufacturer without defects, damage or failure.
1.
Show compliance with ASTM F876 for Crosslinked Polyethylene (PEX) Tubing.
2.
Show compliance with ASTM F877 for Crosslinked Polyethylene (PEX) Plastic Hot- and Cold-Water Distribution Systems.
3.
Show compliance with NSF 61 regarding Drinking Water System Components.
4.
Show compliance with CSA B137.5 regarding Crosslinked Polyethylene (PEX) Tubing Systems for Pressure Applications.
5.
Show compliance with ASTM F1960 regarding Cold Expansion Fittings with PEX Reinforcing Rings for Use with Crosslinked Polyethylene (PEX) Tubing.
6.
Show compliance with NSF-pw to indicate that the product complies with the Health-effects Requirements of NSF/ANSI Standard 61 for Materials Designed for Contact with Potable Water.
C.
Service Tubing:
1.
Material: Crosslinked polyethylene (PEX) is manufactured to PEX-a or Engel-method standard and NSF-certified SDR-9.
2.
Material Standard: Materials are manufactured in accordance with ASTM F876, F877, CSA B137.5 and NSF-pw.
3.
Pressure Ratings: Hydrostatic design and pressure ratings are in accordance with the ASTM standard.
4.
Nominal Inside Diameter: Provide tubing with nominal inside diameter in accordance with ASTM F876, as indicated. Note: Numbers in brackets are the metric equivalent pipe size.
a.
1 inch (25mm).
b.
1-1/4 inch (32mm).
c.
1-1/2 inch (40mm).
d.
2 inch (50mm).
e.
3 inch (75mm).
D.
Outer Jacket:
1.
Material: Corrugated seamless high-density polyethylene (HDPE)
2.
The HDPE jacket completely encompasses and protects the insulation from moisture and damage.
3.
Outer jacket shall be extruded directly over the insulation and is flexible.
4.
The outer jacket shall contain 2 percent carbon black, finely divided and thoroughly dispersed to provide protection from UV degradation.
 
** NOTE TO SPECIFIER ** Specify materials to be furnished. This article lists product by the inside nominal dimension which is common in ASTM dimensioned tubing.
 
5.
Minimum Bend Radius:
a.
1 inch pre-insulated potable tubing with 5.5-inch (140mm) jacket has a bend radius of 10 inches (254mm).
b.
1-1/4 inch pre-insulated potable tubing with 5.5-inch (140mm) jacket has a bend radius of 12 inches (304mm).
c.
1-1/2 inch pre-insulated potable tubing with 6.9-inch (175mm) jacket has a bend radius of 16 inches (406mm).
d.
2 inch pre-insulated potable tubing with 6.9-inch (175mm) jacket has a bend radius of 18 inches (457mm).
e.
3 inch pre-insulated potable tubing with 7.9-inch (200mm) jacket has a bend radius of 32 inches (812mm).
E.
Insulation:
1.
The insulation shall be layered expanded crosslinked water-resistant polyethylene closed-cell foam.
2.
All seams of the insulation shall be sealed.
3.
Insulation shall not be bonded to the service tubing.
F.
End Seals:
1.
The piping manufacturer will supply all EPDM rubber end caps with water-stop seal.
2.
EPDM rubber end caps are to be installed on each end prior to connecting the service pipes and insulating the field joints.
3.
The EPDM end caps will seal onto the tubing and outer jacket forming a watertight seal.
 
** NOTE TO SPECIFIER ** Two fitting programs are available for the PEX Service Tubing. Normally one fitting type is specified on the project. In this case, delete the other fitting reference. It is acceptable to specify both fittings allowing the installing contractor to choose the type of fitting used. For standardization purposes, the installing contractor should then only use one type of fitting for the installation.
 
G.
Cold Expansion Fittings for PEX-a Service Tubing:
1.
For system compatibility, use fittings offered by the tubing manufacturer.
2.
Fittings must comply with the performance requirements of ASTM F877.
3.
Fittings are to be manufactured in accordance with ASTM F1960.
4.
The fitting assembly consists of a barbed adapter and an applicable-sized PEX ring.
5.
All buried fittings will be installed, insulated, and sealed in accordance with the instructions of the piping manufacturer.
H.
Compression Fittings for PEX-a Service Tubing
1.
For system compatibility, use fittings offered by the tubing manufacturer.
2.
Fittings are to be manufactured from dezincification-resistant brass and lead-free brass.
3.
The fitting assembly must comply with performance requirements of ASTM F877.
4.
Fittings will consist of a compression fitting with a coupling sleeve, a fitting body insert with o-ring(s) and a bolt and nut.
5.
All buried fittings will be installed, insulated, and sealed in accordance with the piping manufacturer's instructions.
6.
Male NPT thread for each compression fitting is shown below.
a.
1 inch PEX compression fitting has 1 inch male NPT thread.
b.
1-1/4 inch PEX compression fitting has 1-1/4 inch male NPT thread.
c.
1-1/2 inch PEX compression fitting has 1-1/2 inch male NPT thread.
d.
2 inch PEX compression fitting has 2 inch male NPT thread.
e.
3 inch PEX compression fitting has 2-1/2 inch male NPT thread.
7.
All transition fittings connecting to the compression fittings will be manufactured of dezincification-resistant brass.
I.
Pipe and Fitting Identification: The pipe shall be marked in accordance with the standards to which it is manufactured.
1.
Color identification by the use of stripes on pipe to identify pipe service shall be optional. If used, stripes or colored exterior pipe product shall be blue for potable water, green for wastewater/sewage, or purple for reclaimed water.
2.
Tracing wire shall be placed parallel and 18 inches above, but separate from, the pipe and shall be 10 AWG.
 
** NOTE TO SPECIFIER ** Delete marking tape below if not required.
 
3.
Marking tape shall be approved by the engineer and placed between 12 and 18 inches above the crown of the pipe.
J.
Accessories: Use accessories associated with the installation of the piping system as recommended by or available from the manufacturer.
K.
Insulation Kits: Insulation kits will be manufactured of ABS shells or HDPE sleeves, will feature equal thickness of closed-cell PEX insulation as the pipe, and sealed watertight.
L.
Connection Vaults:
1.
The piping manufacturer will provide the connection vaults when required by the project construction.
2.
Connection vaults shall be constructed of rotationally molded composite polyethylene and PE foam, providing a structurally sound and thermally insulated chamber.
3.
Heat shrink seals as provided by the tubing manufacturer shall be installed to prevent introduction of water into the vault.
M.
Anchors: The project engineer will determine the use of anchors, if required, within the distribution system.
2.5
ASTM ECOFLEX PRE-INSULATED THERMAL SINGLE DISTRIBUTION SYSTEM
 
** NOTE TO SPECIFIER ** Article below should be restricted to statements describing design or performance requirements and functional (not dimensional) tolerances of a complete system. Limit descriptions to composite and operational properties required to link components of a system together and to interface with other systems.
 
A.
Design Requirements: The PEX-a service tubing is USA manufactured and tested in accordance with ASTM F876, ASTM F877, ASTM F1960, CSA B137.5 and NSF-rfh. The PEX service tubing has hydrostatic ratings in accordance with the temperatures and pressures listed in the ASTM standard. The hydrostatic ratings are:
1.
200 degrees F (93 degrees C) at 80 PSI (551 kPa).
2.
180 degrees F (82 degrees C) at 100 PSI (689 kPa).
3.
73.4 degrees F (23 degrees C) at 160 psi (1102 kPa).
B.
Performance Requirements: Provide a pre-insulated distribution system that is USA manufactured, fabricated and installed to comply with regulatory agencies and authorities with jurisdiction, and that maintains performance criteria stated by the tubing manufacturer without defects, damage or failure.
1.
Show compliance with ASTM F876 regarding Crosslinked Polyethylene (PEX) Tubing.
2.
Show compliance with ASTM F877 regarding Crosslinked Polyethylene (PEX) Plastic Hot- and Cold-Water Distribution Systems.
3.
Show compliance with DIN 4726 regarding Oxygen Diffusion.
4.
Show compliance with ASTM F1960 regarding Cold Expansion Fittings with PEX Reinforcing Rings for Use with Crosslinked Polyethylene (PEX) Tubing.
5.
Show compliance with CSA B137.5 regarding Crosslinked Polyethylene (PEX) Tubing Systems for Pressure Applications.
6.
Show compliance with NSF-rfh regarding Radiant Floor Heating Applications
C.
Service Tubing:
1.
Material: Crosslinked polyethylene (PEX) manufactured to PEX-a or Engel-method standard
2.
Material Standard: Manufactured in accordance with ASTM F876 and F877
3.
Pressure Ratings: Hydrostatic design and pressure ratings are in accordance with the ASTM standard. Operating limits are as follows.
a.
-58 degrees F to 203 degrees F at 80 psi (-50 degrees C to 95 degrees C at 551 kPA).
4.
The PEX service tubing in the Ecoflex Thermal Single pipe has an oxygen diffusion barrier that does not exceed an oxygen diffusion rate of 0.10 grams per cubic meter per day at 104 degrees F (40 degrees C) water temperature in accordance with German DIN 4726.
5.
Nominal Inside Diameter: Provide tubing with nominal inside diameter in accordance with ASTM F876, as indicated. Note: Numbers in brackets are the metric equivalent pipe size.
a.
1 inch (25mm).
b.
1-1/4 inch (32mm).
c.
1-1/2 inch (40mm).
d.
2 inch (50mm).
e.
2-1/2 inch (63mm).
f.
3 inch (75mm).
g.
3-1/2 inch (90mm).
h.
4 inch (110mm).
D.
Outer Jacket:
1.
Material: Corrugated seamless high-density polyethylene (HDPE)
2.
The HDPE jacket completely encompasses and protects the insulation from moisture and damage.
3.
Outer jacket shall be extruded directly over the insulation and is flexible.
4.
The outer jacket shall contain 2 percent carbon black, finely divided and thoroughly dispersed to provide protection from UV degradation.
 
** NOTE TO SPECIFIER ** Specify materials to be furnished. This article lists product by the inside nominal dimension which is common in ASTM dimensioned tubing.
 
5.
Minimum Bend Radius:
a.
1 inch pre-insulated tubing with 5.5-inch (140mm) jacket has a bend radius of 10 inches (254mm).
b.
1-1/4 inch pre-insulated tubing with 5.5-inch (140mm) jacket has a bend radius of 12 inches (304mm).
c.
1-1/2 inch pre-insulated tubing with 6.9-inch (175mm) jacket has a bend radius of 16 inches (406mm).
d.
2 inch pre-insulated tubing with 6.9-inch (175mm) jacket has a bend radius of 18 inches (457mm).
e.
2-1/2 inch pre-insulated tubing with 6.9-inch (175mm) jacket has a bend radius of 30 inches (762mm).
f.
3 inch pre-insulated tubing with 7.9-inch (200mm) jacket has a bend radius of 32 inches (812mm).
g.
3-1/2 inch pre-insulated tubing with 7.9-inch (200mm) jacket has a bend radius of 44 inches (1117mm).
h.
4 inch pre-insulated tubing with 7.9-inch (200mm) jacket has a bend radius of 48 inches (1219mm).
E.
Insulation:
1.
The insulation shall be layered expanded crosslinked water-resistant polyethylene closed-cell foam.
2.
All seams of the insulation shall be sealed.
3.
Insulation shall not be bonded to the service tubing.
F.
End Seals:
1.
The piping manufacturer will supply all EPDM rubber end caps with water-stop seal.
2.
EPDM rubber end caps are to be installed on each end prior to connecting the service pipes and insulating the field joints.
3.
The EPDM end caps will seal onto the tubing and outer jacket forming a watertight seal.
 
** NOTE TO SPECIFIER ** Two fitting programs are available for the PEX Service Tubing. Normally one fitting type is specified on the project. In this case, delete the other fitting reference. It is acceptable to specify both fittings allowing the installing contractor to choose the type of fitting used. For standardization purposes, the installing contractor should then only use one type of fitting for the installation.
 
G.
Cold Expansion Fittings for PEX-a Service Tubing:
1.
For system compatibility, use fittings offered by the tubing manufacturer.
2.
Fittings must comply with the performance requirements of ASTM F877.
3.
Fittings are to be manufactured in accordance with ASTM F1960.
4.
The fitting assembly consists of a barbed adapter and an applicable-sized PEX ring.
5.
All buried fittings will be installed, insulated, and sealed in accordance with the instructions of the piping manufacturer.
H.
Compression Fittings for PEX-a Service Tubing:
1.
For system compatibility, use fittings offered by the tubing manufacturer.
2.
Fittings are to be manufactured from dezincification-resistant brass and lead-free brass.
3.
The fitting assembly must comply with performance requirements of ASTM F877.
4.
Fittings will consist of a compression fitting with a coupling sleeve, a fitting body insert with o-ring(s) and a bolt and nut.
5.
All buried fittings will be installed, insulated, and sealed in accordance with the piping manufacturer's instructions.
6.
Male NPT thread for each compression fitting is shown below.
a.
1 inch PEX compression fitting has 1-inch male NPT thread.
b.
1-1/4 inch PEX compression fitting has 1-1/4 inch male NPT thread.
c.
1-1/2 inch PEX compression fitting has 1-1/2 inch male NPT thread.
d.
2 inch PEX compression fitting has 2 inch male NPT thread.
e.
2-1/2 inch PEX compression fitting has 2 inch male NPT thread.
f.
3 inch PEX compression fitting has 2-1/2 inch male NPT thread.
g.
3-1/2 inch PEX compression fitting has 3 inch male NPT thread.
h.
4 inch PEX compression fitting has 4 inch male NPT thread.
7.
All transition fittings connecting to the compression fittings will be manufactured of dezincification-resistant brass.
I.
Pipe and Fitting Identification: The pipe shall be marked in accordance with the standards to which it is manufactured.
1.
Color identification by the use of stripes on pipe to identify pipe service shall be optional. If used, stripes or colored exterior pipe product shall be blue for potable water, green for wastewater/sewage, or purple for reclaimed water.
2.
Tracing wire shall be placed parallel and 18 inches above, but separate from, the pipe and shall be 10 AWG.
 
** NOTE TO SPECIFIER ** Delete marking tape below if not required.
 
3.
Marking tape shall be approved by the engineer and placed between 12 and 18 inches above the crown of the pipe.
J.
Accessories: Use accessories associated with the installation of the piping system as recommended by or available from the manufacturer.
K.
Insulation Kits: Insulation kits will be manufactured of ABS shells or HDPE sleeves, will feature equal thickness of closed-cell PEX insulation as the pipe, and sealed watertight.
L.
Connection Vaults:
1.
The piping manufacturer will provide the connection vaults when required by the project construction.
2.
Connection vaults shall be constructed of rotationally molded composite polyethylene and PE foam, providing a structurally sound and thermally insulated chamber.
3.
Heat shrink seals as provided by the tubing manufacturer shall be installed to prevent introduction of water into the vault.
M.
Anchors: The project engineer will determine the use of anchors, if required, within the distribution system.
2.6
ASTM ECOFLEX PRE-INSULATED THERMAL TWIN DISTRIBUTION SYSTEM
 
** NOTE TO SPECIFIER ** Article below should be restricted to statements describing design or performance requirements and functional (not dimensional) tolerances of a complete system. Limit descriptions to composite and operational properties required to link components of a system together and to interface with other systems.
 
A.
Design Requirements: The PEX-a service tubing is USA manufactured and tested in accordance with ASTM F876, ASTM F877, ASTM F1960, CSA B137.5 and NSF-rfh. The PEX service tubing has hydrostatic ratings in accordance with the temperatures and pressures listed in the ASTM standard. The hydrostatic ratings are:
1.
200 degrees F (93 degrees C) at 80 PSI (551 kPa).
2.
180 degrees F (82 degrees C) at 100 PSI (689 kPa).
3.
73.4 degrees F (23 degrees C) at 160 psi (1102 kPa).
B.
Performance Requirements: Provide a pre-insulated distribution system that is USA manufactured, fabricated and installed to comply with regulatory agencies and authorities with jurisdiction, and that maintains performance criteria stated by the tubing manufacturer without defects, damage or failure.
1.
Show compliance with ASTM F876 regarding Crosslinked Polyethylene (PEX) Tubing.
2.
Show compliance with ASTM F877 regarding Crosslinked Polyethylene (PEX) Plastic Hot- and Cold-Water Distribution Systems.
3.
Show compliance with DIN 4726 regarding Oxygen Diffusion.
4.
Show compliance with ASTM F1960 regarding Cold Expansion Fittings with PEX Reinforcing Rings for Use with Crosslinked Polyethylene (PEX) Tubing.
5.
Show compliance with CSA B137.5 regarding Crosslinked Polyethylene (PEX) Tubing Systems for Pressure Applications.
6.
Show compliance with NSF-rfh regarding Radiant Floor Heating Applications.
C.
Service Tubing:
1.
Material: Crosslinked polyethylene (PEX) manufactured to PEX-a or Engel-method standard
2.
Material Standard: Manufactured in accordance with ASTM F876 and F877.
3.
Pressure Ratings: Hydrostatic design and pressure ratings are in accordance with the ASTM standard. Operating limits are as follows.
a.
-58 degrees F to 203 degrees F at 80 psi (-50 degrees C to 95 degrees C at 551 kPA).
4.
The PEX service twin tubing in the Ecoflex Thermal Twin pipe have an oxygen diffusion barrier that does not exceed an oxygen diffusion rate of 0.10 grams per cubic meter per day at 104 degrees F (40 degrees C) water temperature in accordance with German DIN 4726.
5.
Nominal Inside Diameter: Provide tubing with nominal inside diameter in accordance with ASTM F876, as indicated. Note: Numbers in brackets are the metric equivalent pipe size.
a.
1 inch (25mm).
b.
1-1/4 inch (32mm).
c.
1-1/2 inch (40mm).
d.
2 inch (50mm).
e.
2-1/2 inch (63mm).
D.
Outer Jacket:
1.
Material: Corrugated seamless high-density polyethylene (HDPE).
2.
The HDPE jacket completely encompasses and protects the insulation from moisture and damage.
3.
Outer jacket shall be extruded directly over the insulation and is flexible.
4.
The outer jacket shall contain 2 percent carbon black, finely divided and thoroughly dispersed to provide protection from UV degradation.
 
** NOTE TO SPECIFIER ** Specify materials to be furnished. This article lists product by the inside nominal dimension which is common in ASTM dimensioned tubing.
 
5.
Minimum Bend Radius:
a.
1 inch pre-insulated twin tubing with 6.9-inch (175mm) jacket has a bend radius of 20 inches (254mm).
b.
1-1/4 inch pre-insulated twin tubing with 6.9-inch (175mm) jacket has a bend radius of 28 inches (711mm).
c.
1-1/2 inch pre-insulated twin tubing with 6.9-inch (175mm) jacket has a bend radius of 32 inches (812mm).
d.
2 inch pre-insulated twin tubing with 7.9-inch (200mm) jacket has a bend radius of 40 inches (1016mm).
e.
2-1/2 inch pre-insulated twin tubing with 7.9-inch (200mm) jacket has a bend radius of 48 inches (1219mm).
E.
Insulation:
1.
The insulation shall be layered expanded crosslinked water-resistant polyethylene closed-cell foam.
2.
All seams of the insulation shall be sealed.
3.
Insulation shall not be bonded to the service tubing.
F.
End Seals:
1.
The piping manufacturer will supply all EPDM rubber end caps with water-stop seal.
2.
EPDM rubber end caps are to be installed on each end prior to connecting the service pipes and insulating the field joints.
3.
The EPDM end caps will seal onto the tubing and outer jacket forming a watertight seal.
 
** NOTE TO SPECIFIER ** Two fitting programs are available for the PEX Service Tubing. Normally one fitting type is specified on the project. In this case, delete the other fitting reference. It is acceptable to specify both fittings allowing the installing contractor to choose the type of fitting used. For standardization purposes, the installing contractor should then only use one type of fitting for the installation.
 
G.
Cold Expansion Fittings for PEX-a Service Tubing:
1.
For system compatibility, use fittings offered by the tubing manufacturer.
2.
Fittings must comply with the performance requirements of ASTM F877.
3.
Fittings are to be manufactured in accordance with ASTM F1960.
4.
The fitting assembly consists of a barbed adapter and an applicable-sized PEX ring.
5.
All buried fittings will be installed, insulated, and sealed in accordance with the instructions of the piping manufacturer.
H.
Compression Fittings for PEX-a Service Tubing:
1.
For system compatibility, use fittings offered by the tubing manufacturer.
2.
Fittings are to be manufactured from dezincification-resistant brass and lead-free brass.
3.
The fitting assembly must comply with performance requirements of ASTM F877.
4.
Fittings will consist of a compression fitting with a coupling sleeve, a fitting body insert with o-ring(s) and a bolt and nut.
5.
All buried fittings will be installed, insulated, and sealed in accordance with the piping manufacturer's instructions.
6.
Male NPT thread for each compression fitting is shown below.
a.
1 inch PEX compression fitting has 1-inch male NPT thread.
b.
1-1/4 inch PEX compression fitting has 1-1/4 inch male NPT thread.
c.
1-1/2 inch PEX compression fitting has 1-1/2 inch male NPT thread.
d.
2 inch PEX compression fitting has 2 inch male NPT thread.
e.
2-1/2 inch PEX compression fitting has 2 inch male NPT thread.
7.
All transition fittings connecting to the compression fittings will be manufactured of dezincification-resistant brass.
I.
Pipe and Fitting Identification: The pipe shall be marked in accordance with the standards to which it is manufactured.
1.
Color identification by the use of stripes on pipe to identify pipe service shall be optional. If used, stripes or colored exterior pipe product shall be blue for potable water, green for wastewater/sewage, or purple for reclaimed water.
2.
Tracing wire shall be placed parallel and 18 inches above, but separate from, the pipe and shall be 10 AWG.
 
** NOTE TO SPECIFIER ** Delete marking tape below if not required.
 
3.
Marking tape shall be approved by the engineer and placed between 12 and 18 inches above the crown of the pipe.
J.
Accessories: Use accessories associated with the installation of the piping system as recommended by or available from the manufacturer.
K.
Insulation Kits: Insulation kits will be manufactured of ABS shells or HDPE sleeves, will feature equal thickness of closed-cell PEX insulation as the pipe, and sealed watertight.
L.
Connection Vaults:
1.
The piping manufacturer will provide the connection vaults when required by the project construction.
2.
Connection vaults shall be constructed of rotationally molded composite polyethylene and PE foam, providing a structurally sound and thermally insulated chamber.
3.
Heat shrink seals as provided by the tubing manufacturer shall be installed to prevent introduction of water into the vault.
M.
Anchors: The project engineer will determine the use of anchors, if required, within the distribution system.
PART 3 EXECUTION
 
3.1
EXAMINATION
A.
Site Verification of Conditions: Verify that site conditions are acceptable for installation of the hydronic piping distribution system. Do not proceed with installation until unacceptable conditions are corrected.
3.2
INSTALLATION
A.
Install hydronic piping according to approved shop drawings or coordination drawings.
B.
Comply with manufacturer's product data, including product technical bulletins, installation instructions and design drawings, including the following.
1.
Uponor Pre-insulated Pipe Systems Design and Installation Manual, current edition.
 
** NOTE TO SPECIFIER ** Delete below if not required.
 
C.
Below-grade Installation:
1.
Pre-insulated piping shall be installed in accordance with manufacturer's recommendations and the details as shown on the contract drawings.
2.
The system will be installed with the fewest number of underground joints as possible.
3.
The system does not require expansion loops, expansion joints or compensators of any type.
4.
An EPDM rubber end cap shall be applied at all terminations of the piping system, including all fitting locations, to form a watertight seal.
5.
All buried fittings will be installed, insulated and sealed in accordance with the piping manufacturer's instructions.
6.
Connection Vaults or Insulation Kits are required for all below-grade installations.
D.
Backfill:
1.
The pre-insulated piping system will be backfilled with clean sand material.
a.
Minimum vertical distance from the bottom of the tubing to the trench floor is 4 inches (100 mm).
b.
Minimum lateral distance from the side of the tubing to the trench wall is 6 inches (150 mm).
c.
Install a minimum of 12 inches (300 mm) of clean fill over the top of the potable pre-insulated piping.
2.
The balance of the trench can be backfilled with native soil void of stone greater than 2 inches (50m) in diameter.
 
** NOTE TO SPECIFIER ** Delete below if not required.
 
E.
PEX-a Piping:
1.
PEX-a Piping Hanger Spacing: Install hangers for PEX-a piping with the following maximum spacing:
a.
1 inch and below: Maximum span, 32 inches.
b.
1-1/2 inch and above: Maximum span, 48 inches.
2.
PEX-a Piping Hanger Spacing with PEX-a Support Channel: Install hangers for PEX-a piping with horizontal support channel in accordance with local jurisdiction and manufacturer's recommendations, with the following maximum spacing:
a.
Maximum span, 8 feet.
3.
PEX-a Riser Supports: Install CTS riser clamps at the base of each floor and at the top of every other floor. Install mid-story guides between each floor.
4.
Pipe Joint Connections: Install per manufacturer's recommendations. Use manufacturer-recommended cold-expansion tool for F1960 connections.
3.3
FIELD QUALITY CONTROL
A.
Site Tests: To ensure system integrity, pressure-test the tubing before and during backfilling of the piping. The service tubing will be air tested at 11/2 times the operating pressure for a minimum of 1 hour prior to system burial
3.4
CLEANING
A.
Remove temporary coverings and protection of adjacent work areas.
B.
Repair or replace damaged installed products.
C.
Clean the installed products in accordance with manufacturer's instructions prior to Owner's acceptance.
D.
Remove construction debris from project site and legally dispose of debris
3.5
DEMONSTRATION
A.
Demonstrate operation of the piping distribution system to Owner's personnel.
3.6
PROTECTION
A.
Protect installed work from damage caused by subsequent construction activity on the site
END OF SECTION