Universal Replacement Dome and Collar Assembly

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Universal Replacement Dome and Collar Assembly

Figure Number:  1001
Product Function:
Universal cast iron membrane clamping collar and dome are designed for retrofit roof applications where the existing main roof drain body is to remain in place and continue to be operative. The bolting lugs of this collar match the bolt pattern of the majority of the common roof drain bodies and generally conform to the surface angles of the flange. This allows easy replacement along with adequate pressure on the membrane to insure water tightness. The collar is designed to accompany most 15" (380) and 16" (405) diameter roof drain bodies with bolt circles ranging 7 1/4" (185) to 10 3/4" (275) in diameter. It is recommended to extend roof membrane into the sump of existing roof drain body.

Regularly Furnished:
Polyethylene "Twist Lock" Dome and Duco Coated Universal Cast Iron Membrane Clamping Collar with Mounting Hardware.
Product Details
  • Product Type:  Roof Drain
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NameDescriptionFile Size
Specifications US Govt ComplianceItems complying with U.S. government specifications34 KBDownload
CSI Specifications for Roof DrainsCSI Specifications for Roof Drains230 KB
NameDescriptionFile Size
Parts Order Guide for Roof DrainsParts Order Guide for Roof Drains632 KBView

Optional Materials

  • Aluminum Dome -AD
  • Cast Iron Dome -CID
  • 8" (205) High Cast Iron Dome -CID8
  • Galvanized Collar -CG
  • Galvanized Cast Iron Dome -CIDG
  • Rough Bronze Dome -RBD
  • Stainless Steel Mesh Covered Dome -SSM


  • Less Dome -LD (Specify Fig. 1002)
  • Perforated Stainless Steel Gravel Guard (Specify Height)
  • Solid Water Dam Collar -WD (Specify Height)
  • Vandal Proof -U