Marathon Roofing Products Inc.
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Roof Drains, Vents, Accessories And Pedestal Supports
Cast Pak RD-1

Cast-Pak Assembly of the RD-1 Roof Drain provides the essential features of more expensive cast iron drains at an affordable price. It is adaptable to most generic materials of single ply and conventional built-up roofing for use with roof decks of steel, wood, precast concrete or gypsum. This drain offers versatility and easy installation on new and existing roofs. Made of epoxy coated cast iron body that is supplied with an metal clamping ring, underdeck clamp, rubber coupling and strainer.


  • Molded polyethylene strainer bolts to clamping ring
  • Metal clamping ring with gravel stop
  • Metal underdeck clamp
  • Cast Iron body
  • Fernco flexible expansion coupling


  • 2-3/4" low profile aluminum strainer
  • Aluminum strainer
  • Cast iron strainer
  • Extension flange
  • Bearing pan
  • Overflow ring
  • Available in 3", 4", 6", 8" and 10"

Cast Pak Data Sheet

Direct Connect Product Brochure

Cast Pak Installation Guide

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CAD Detail Files for Cast Pak RD-1

Cast Pak
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Specifications for Cast Pak RD-1

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