Wastewater Collection and Transport

The E/One Sewer system is a pressure sewer system that is powered by E/One grinder pumps. A pressure sewer system uses small-diameter pipes and grinder pumps, which are often installed at each home. The grinder pump station collects all of the wastewater from the home and grinds it into slurry. The wastewater is then pumped to a larger sewer main or directly to a wastewater treatment plant.

Sewage grinder pumps collect all of the wastewater from the home, grind up solids, and send the wastewater to the sewer line or treatment system. They are commonly used gravity sewer systems, septic tank and other wastewater systems cannot be used or are too expensive. 

The grinder pump is automatically activated and typically runs for very short periods several times per day. Electrical consumption of the grinder pump is low -  a household that uses 250 gallons of water per day should use between 6 kwhr and 23 kwhr per month to run the pump. (Actual water and power usage will vary depending on the system pressure.)

The D-Series is E/One's most popular line of grinder pump stations. The tank design features a dry accessway; pumps are mounted on a transition that separates the wetwell of the tank from the accessway. A range of station heights is available to accommodate shallow to very deep burial requirements for cold climates. Simplex and duplex grinder pump stations are available. Capacities range from 70 to 500 gallons, depending on the model.

The W-Series is E/One's most flexible product line. A range of basins, covers, discharges, inlets and panels are available. Stations are available with up to four pumps, depending on the tank chosen.

The Gatorgrinder reduces all forms of sanitary waste to a non-clogging slurry and pumps it through a network of small-diameter pipes. Designed specifically for operation in warmer climates, the Gatorgrinder is an efficient, economic station for single-family homes.

The IH091 sewage grinder pump station is designed to be installed indoors - in the basement or mechanical room of a home. Its attractive design fits in with other household mechanical devices.

Air release stations are required on large sewer systems. E/One's Air Release Station (ARS) uses the same rugged HDPE tank and lid as E/One's W-Series grinder pump stations, but have an open-bottom design.

The Upgrade (U-Series) from E/One is a replacement grinder pump engineered to fit into virtually any grinder pump wet well. Universal design allows easy drop-in conversion, ready to connect. The Upgrade is a complete replacement for all of the troublesome components of a centrifugal pump, including slide rails, pump/motor, float switches, piping and motor control devices.

E/One's sewer system lateral kits, often called "curb stops" or "check valves," feature all components commonly needed to connect an E/One grinder pump station to the sewer main. 

Available in 1.25-inch and 2-inch sizes, UNI-LATERAL is an integrated unit consisting of a check valve, ball valve and cleanout all in a compact module - a first for the domestic market. The versatile design greatly reduces opportunity for leak paths - simplifying and speeding installation, while meeting all codes and regulations. UNI-LATERAL's advanced design effectively protects against potentially harmful backflow.

• 1.25" or 2" full-port design
• Designed for use with PVC (1.25" UNI-LATERAL only) and HDPE pressure sewer piping
• 316 stainless steel construction
• Available with or without fittings
• Designed and tested to 235 psi service pressure

E/One offers a line of alarm panels for its grinder pump stations. Panels are available with a range of options and can also be customized.

• Supplied with audible and visual high level alarms
• Easily installed in accordance with relevant national and local codes
• Standard panels are approved by UL, CSA, CE and NSF to ensure high quality and safety
• Corrosion-proof, NEMA 4X-rated, thermoplastic enclosure
• A padlock is provided to prevent unauthorized entry

The E/One Extender provides a quick and easy way to add 6 inches of height to an already-installed E/One grinder pump station.

If a grinder pump station has been installed too low into the ground -- where the lid sits directly on the grass, or slightly beneath the grass -- the station will be prone to infiltration. The vent may also be blocked, which could interfere with proper pump operation. The solution? The E/One Extender. The pre-engineered E/One Extender provides protection and meets warranty requirements for most Extreme and 2000 Series grinder pump stations.

Don't want to see the grinder pump lid in your yard? Cover it with a decorative rock from E/One Sewer Systems. Lightweight and durable, the rock is a simple solution to disguise the lid, or make it blend into the landscaping.

Why use the rock from E/One? This particular rock, which is available in two sizes and four colors, has been chosen and approved by E/One: it is durable and, most importantly, has built-in vents that will allow air to circulate beneath the rock, allowing the pump to operate properly.

Challenge: 

Faced with a deteriorating gravity sewer system that was too difficult and costly to maintain, the town of Bigfork, Montana needed an environmentally sensitive and economically sensible central sewer system.

Solution:
Bigfork chose the safest and most cost-effective solution – E/One's ALL-TERRAIN SEWER. Find out how they ensured that the waters of the largest lake west of the Mississippi remain as pristine as possible in this must-see video. Hear from the engineer and maintenance staff about a best practice gaining popularity in waterfront communities across the country. 

Challenge:
Managing a sewer district's operation and maintenance costs while improving water quality and customer satisfaction in a seasonal locale.Serving a population that grows by 25 percent every summer, Skagit County's Sewer District operators wanted to ensure that Big Lake's water quality, local wildlife and vacationers' fun were protected — without blowing out the department's operating budget. The original pressure sewer system was designed to use centrifugal pumps, which proved to be problematic: Level sensors failed repeatedly, the rail-mounted system would freeze, and pumps required recurring service calls and replacement. O&M costs were high.

Solution:
The centrifugal pumps were replaced with semi-positive displacement E/One grinder pumps, a product with the longest average mean time between service calls with zero preventive maintenance. In addition to their reliability and lower O&M costs, E/One grinder pumps are designed and purpose-built with simplicity of operation and serviceability in mind.

Challenge: A Community Needed to Protect its Lake from Failing Septic Tanks
Perkins Pond, located in Sunapee, New Hampshire, has approximately 100 homes with 30 occupied year-round. The desire for a central sewer system dated back the 1970s, but conventional gravity sewer was cost-prohibitive. Many homes and their septic tanks were located close to the lake, which residents knew would fail eventually.

Solution: A Cost-Effective Sewer System
The Perkins Pond Protective Association persisted: they worked to get a sewer vote on the ballot and even when the vote failed, they created a plan to communicate the need to residents. Eventually sewers were approved and both pressure sewer and gravity systems were reviewed.

Terrain around Perkins Pond is hilly. A gravity sewer system would have required several lift stations, adding significantly to the project costs. Pressure sewer cost about half that of gravity sewer and didn't require as many lift stations — approximately $1.5 million for pressure sewer vs $3 million for gravity sewer.

Challenge: Failing Septic Tanks
Bloomingdale, Georgia, relied on septic tanks until 1984. When tests were performed, the city discovered that the septic tanks did not perc properly and "the city was just saturated," said Ernie Grizzard, Public Works Superintendent. A moratorium on building permits was issued until a central sewer system was installed.

Solution: Choosing a Central Sewer System
Both pressure sewer and gravity sewer were considered. Pressure sewer was chosen for several reasons, including burial depth for the sewer mains: because frost is not a concern in Bloomingdale, mains are located approximately 3 feet below the surface (pressure sewer mains are buried just below the frost line, which varies by location). Gravity sewer mains commonly require depths of 15 to 20 feet regardless of frost depth. 

Challenge: Aging septic tanks and cesspools, and high groundwater
Valencia County performed an assessment of the water and sewer needs for Peralta, New Mexico, an old town that relied on septic tanks and cesspools. Onsite systems in Peralta were of great concern because of their age and proximity to groundwater in this established agricultural area.

Solution: Pressure sewer offers flexibility and low impact
The consulting engineer evaluated gravity sewer, vacuum sewer, and pressure sewer. Pressure sewer systems offered the best advantages for providing central sewer service to Peralta.

Challenge:
Martha's Vineyard is a resort island off the coast of Cape Cod, Massachusetts, whose population swells from 17,000 in the winter to more than 110,000 during the summer. The land is flat and sandy, the result of the island's formation by a glacier.

Cottages in Oak Bluffs date to the 1860s and used septic tanks or cesspools for wastewater disposal. Ground percolation was an issue, and the dense population left no space for Title 5-approved onsite systems.

In 2004, a TMDL was issued for Edgartown Great Pond, a result of aging septic tanks. Substantial areas needed to be sewered quickly and economically — but the terrain made gravity sewer impossible.

Solution:
In Edgartown, the ALL-TERRAIN SEWER pressure sewer system was the answer for the 300 septic tanks located in the watershed that needed to be removed in order to meet the mitigation plan. Grinder pumps had previously been used to sewer areas that couldn't achieve the pitch required for gravity sewer.

The grinder pump stations installed at each home don't require a lot of space, which was also the solution for Oak Bluffs. The E/One grinder pump stations are resistant to storm surge - some stations are only 4 feet from the shoreline.

Challenge: Extend sewer service to homes located below grade
Most of the sewer system in the Snyderville Basin Water Reclamation District is gravity sewer. How could sewer service be extended to 5 or 6 below-grade lots without adding a lift station? Because the District maintains the system, a new lift station was a maintenance cost they didn't want to add.

Solution: E/One pressure sewer ties into existing gravity
The area around Park City has experienced incredible growth during the past 10 years. While the mountains offer beautiful and desirable views, the rock is very difficult and expensive to excavate — so expensive that the construction company for Promontory determined that purchasing a rock trencher was more feasible than leasing the required amount of time. Hence, installation costs alone for ALL-TERRAIN SEWER were much less than a gravity sewer system.

Challenge:
Create a luxury development served by a central sewer system that wouldn't be seen or heard.

Solution:
Developers chose the ALL-TERRAIN SEWER pressure sewer system from E/One. 

A lot of thought was put into planning the sewer system (among other features) at Reynolds Lake Oconee — aesthetics and planning for future growth were important. ALL-TERRAIN SEWER gives homeowners flexibility in how they would like their lot laid out and where they'd like to place the homes: they can place their homes close to water or on a ledge to maximize the gorgeous lake views.

Challenge:
Campers Haven is a seasonal RV resort on Cape Cod in Dennis Port, Mass, that is open April through October. The resort is located close to Nantucket Sound on Cape Cod, an idyllic location for summer resort living. 

Solution:
ALL-TERRAIN SEWER from E/One pressure sewer systems was the solution. Low lying, sandy terrain with ground water as little as 3 feet below the surface presented challenges -- gravity sewer wouldn't have been an option with the dewatering and trenching involved. Lift stations would have also been required. And because the project needed to get completed in the off season with winter looming, ALL-TERRAIN SEWER also offered easier and faster installation.

Challenge:
Outdoor Paradise: Situated among rolling hills in northern Georgia, Great Sky is a planned community of 450+ homes with outdoor amenities that include walking trails and Hickory Log Creek Reservoir.

Sewering the steep terrain with a gravity system would have required 21 lift stations for the initial phase. The developers used ALL-TERRAIN SEWER pressure sewer systems and reduced that number to 3 lift stations. 

Solution:
Providing sewer service for Great Sky would have been cost-prohibitive if a gravity system was used. In steep topography, installation can require heavy excavation. With mountainous areas, excavation and installation costs can run to millions of dollars.

ALL-TERRAIN SEWER pressure sewer systems from E/One were a perfect fit: because installation follows the contours of the land and need only be buried just below the frost line, installation costs were significantly less. The developers have flexibility in locating home sites and can leave open space, preserving the many trees.

Challenge:
The aging clay pipes in the gravity sewer system in Honea Path, South Carolina, allowed infiltration and inflow (I&I) into the system, resulting in high treatment costs - as much as $87,000 per month.

Solution:
Honea Path's experience with ALL-TERRAIN SEWER pressure sewer systems from E/One started with a single grinder pump installed at a problematic location. With excellent results at the first installation, Honea Path is expanding the pressure sewer system. 

Challenge:
When general manager Bruce Giles joined First Utility District (FUD) of Knox County, Tennessee, the district was undergoing a large gravity sewer rehab program. Bruce had years of experience with gravity sewer rehab programs, but was less familiar with pressure sewer. In fact, he questioned, "Who was stupid enough to install 2000 grinder pumps for me to maintain?"

Solution:
FUD Knox County operates like a business, analyzing their spending. Their gravity sewer maintenance costs were much higher than pressure sewer — almost twice the cost. Reviewing the numbers changed Bruce's perspective: their pressure sewer system experiences no overflows, few maintenance issues, and two people maintain 2300 E/One grinder pumps.

Challenge:
Hilton Head is a barrier island along the coast of South Carolina. The island is heavily reliant on tourism, with approximately 2.5 million visitors annually. Sandy soil, a high water table, tides and storms - and their associated rains and surges - are problematic for onsite wastewater disposal. A study from the University of South Carolina at Beaufort biology department looked at the soil types and concluded that the local soil types were not suitable for the island's septic tanks.

Solution:
During the past several years, Hilton Head has committed to eliminating septic tanks and replacing them with pressure sewer. Homeowners no longer have to worry about saturation of their septic tanks during storms. The flexibility of installing pressure sewer allowed trees and other landscaping to be preserved with minimal disruption to the community — an important social impact factor, especially in a resort area.

The original pressure sewer system was designed to use centrifugal pumps, which proved to be problematic: level sensors failed repeatedly, and some entire pumps required repeated replacement. O&M costs were high. 

Challenge:
The Hideaway at Arrington is a residential and golf course development built on the former home site of country singer Tanya Tucker. The wastewater treatment plant was already located half a mile down the road, serving the golf course. The housing development was designed afterward and will be approximately 500 homes at buildout. 

The terrain consists of rolling hills, limestone, and lots of rock. A gravity sewer system would have been difficult to install, and likely cost prohibitive — getting below the frostline of about 30 inches can be challenging in this area.

Solution:
The ALL-TERRAIN SEWER pressure sewer system from E/One was selected for the project. Pressure sewer lines follow the contour of the land and only need to be installed below the frost line, allowing for flexibility in the design of the development. The grinder pumps send wastewater to a central line, which goes to the treatment plant down the road. The treatment plant currently serves about 200 homes and will be expanded as buildout continues.

Challenge:
Sweetwater Ranch is a master planned community that was initiated in 2004. It covers 2000 acres and, upon buildout, will consist of 1600 to 1700 single-family residential lots. The limestone environment has a variety of design challenges — impossible to penetrate, and peaks and valleys that result in higher-than-typical head conditions.

A gravity sewer system was originally designed for the project. Deep trenches and 14 to 15 lift stations would have been needed because of the transex of a creek and its tributaries. Daily lift station inspection would've required extra personnel for the system operator.

Solution:
The ALL-TERRAIN SEWER pressure sewer system from E/One was a much more cost-efficient solution:

• Because pressure sewer systems require only shallow trenches (mains are installed just below the frost line), deep sewer cuts (some 20 feet or more) were eliminated.

• The pressure sewer system also eliminated all but one lift station.

Challenge:
The Finger Lakes, located in western New York, were formed by the glacial carving of stream valleys 2 million years ago. The result is terrain that consists of steep slopes and lots of rock that is difficult to excavate.

The Town of Jerusalem recognized that septic systems were problematic in their lake setting and required inspections every five years. If a septic system was determined to have failed inspection, corrections were required, which often included the installation of a new septic system at a cost of $20,000 to $30,000. In many instances there was not enough room to install a new septic system. The town knew that a central sewer system was needed despite their challenging site conditions:

Homes are lakeside on small lots and often sited well below grade of the road (some 25 and 50 feet); pumping uphill meant high head conditions

• The small lots meant that little space was available for septic tank leach fields; a high water table and ineffective subsurface drainage compounded the problem

• Septic tanks were leaking into the lake, polluting the water and causing algae blooms

A gravity sewer system was estimated to cost $6 million.

Solution:
After visiting other pressure sewer systems in the region, the Town of Jerusalem decided that ALL-TERRAIN SEWER from E/One was the most economically and environmentally favorable sewer solution.

The pressure sewer system cost approximately half the cost of the gravity sewer estimate, coming in at $3.2 million.

Challenge:
Developing a resort retirement community with lakes, golf courses, restaurants in the rocky, steep terrain of eastern Tennessee.

Fairfield Glade, Tennessee, is one of E/One's largest and oldest projects, dating back to the 1970s when pressure sewer was new technology. ALL-TERRAIN SEWER is a perfect fit for the topography: 

• Bluffs, gorges, and rolling hills

• 200- to 300-foot elevation changes, resulting in extreme head conditions

• Shallow soil to rock
  
  

Solution:
Fairfield Glade is an on-going project with a long and large builout. Grinder pump stations need to be installed only when homes are built.

Serving lakefront lots would have been impossible without ALL-TERRAIN SEWER — the cost of the lift stations alone would have made the project cost-prohibitive. The flexibility of pressure sewer design allows developers to site homes on lots in order to maximize lake views and preserve trees.

Challenge:
Create a luxury development served by a central sewer system on the stunning Kona coastline while preserving its archeological treasures and delicate ecosystems. The site is 450 acres, flat with slopes in several directions, and below grade from the wastewater treatment plant.

A gravity sewer system was designed that would have required several lift stations with mains as much as 27 feet deep in solid rock. The gravity sewer was deemed cost prohibitive.

Solution:
A pressure sewer system with E/One grinder pumps was estimated to cost 50 percent less than gravity sewer. Trenches needed to be only 3 feet deep with 4-inch sewer mains.

Pressure sewer systems offer flexibility in site design, allowing the developers to preserve the anchialine ponds and archeological areas.

Challenge:
Fallingwater, designed by Frank Lloyd Wright, is renowned as one of the most unique homes ever built in America. The home, an historical site visited by thousands of people each year, cantilevers over Bear Run in western Pennsylvania. The Western Pennsylvania Conservancy had strict requirements for sewage disposal when Fallingwater underwent its massive restoration.

Historical site meant strict requirements for excavation and grinder pump location.

Sewage needed to be collected from several buildings, then pumped uphill to the treatment plant.

Solution:
Directional drilling was used to install the sewer lines, protecting the existing plants and trees. The E/One Sewer system met the requirements of aesthetics and seasonal high flows.

Challenge:
Create a sustainable development served by a central sewer system while preserving the natural environment.

Solution:
The Penney Group chose the ALL-TERRAIN SEWER pressure sewer system from E/One to serve the development. 

After spending almost six years to consolidate separate parcels into a contiguous 634-acre tract of mature forest touching seven different lakes -- and another four negotiating a development agreement with the regional government -- Penney Group embarked on a unique challenge: creating an open space conservation community restricted to only 634 moderately sized and priced residences while leaving 60 percent of the pristine landscape undisturbed.

Challenge:
Beach Drive in Port Orchard, Washington, is an established community of 200+ homes in the Pacific northwest. The community was faced with an urgent problem: septic tanks were failing, creating a serious health issue and impacting the oyster and clam beds of Puget Sound.

Solution:
"The Beach Drive area was declared a health hazard by the local Health District. We needed a feasible solution for 200 homes along 4.5 miles of shoreline containing a lot of rock and high water tables. We investigated several ways to do the sewers and decided on the E/One system because of the ease of installation, low cost, and its record of dependability. We have at least one other area like Beach Drive and will be using an E/One system." – Dick Fitzwater, General Manager in Kitsap County Sewer District

Challenge:
After Rincon Point’s surfing community noticed that the water was causing rashes and infections, beaches began to close because high levels of bacteria and other contamination coming from the oceanfront homes. Groundwater was affected by tides, causing the water inside the septic tanks to then leak into the ocean.

Solution:
The Carpenteria Sanitary District (CSD) initiated the Rincon Point Septic to Sewer Conversion Project in 1999 as a long-term solution to safely convey wastewater to CSD’s treatment plant. Gravity sewers would have required multiple lift stations as well as permitting through an archeological site — both expensive and may not permissible. The high water table was also a concern.

The ALL-TERRAIN SEWER pressure sewer solution from E/One was chosen to service the 72 homes, estimated at half the cost of gravity sewer.

Challenge:
With 114 miles of difficult, sandy terrain and undulating plains, the Mornington Peninsula coastline experiences a huge increase in the population from summer tourism. Strained or failing septic tanks caused leaching, odors and contamination of groundwater.

Solution:
The ALL-TERRAIN SEWER pressure sewer system from E/One coupled with the intelligent OneBox control and monitoring system was selected to solve the problem. The approximately $297.5 million pioneering approach to sewage management combines a low-pressure sewer system (LPS) with the iota OneBox, a proprietary remote-control telemetry network that monitors and governs in real time more than (eventually) 16,000 grinder pumps in what will be one of the world's largest installations of its kind.

Challenge:
The original builder of this property had gone bankrupt when installing a sump pump and lift station.

• Solid rock and a home site below grade

• The town's environmental requirements meant minimal disruption was allowed during construction 

Solution:
Arizona builder Michael Mendelsohn knew that an E/One grinder pump required less excavation, was more realiable, and cost a fraction of the sump pump and lift station.

Challenge:
Locke is an historic, Chinese-settled town south of Sacramento. The original sewer system, built when the town was founded in 1915, transported wastewater to a septic tank and onto treatment ponds.

• An antiquated, undersized sewer system discharged to a community septic tank
• Sewage often flowed to an open field instead of treatment ponds

Solution:
E/One Sewers eliminated the odor problems cited by residents and still protected the historic character of the town

Challenge:
Located south of Nashville, Brentwood is a largely residential community that is also home to some of Nashville's biggest stars. The city chose a pressure sewer system for its septic-to-sewer conversion project. But the original grinder pumps that were installed did not meet the performance specifications of the system and resulted in head losses. Grease-fouled floats were also common, leading to numerous service calls.

Solution:
E/One's AfterMarket Grinder Pump (currently known as the Upgrade) replaced failing centrifugal pumps