Roof Drain with 4.00" Gravel Stop Extension and Adjustable Extension

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Roof Drain with 4.00" Gravel Stop Extension and Adjustable Extension

Figure Number:  1037
Product Function:
Used on roof systems where the insulated membrane assembly method of waterproofing is installed using a liquid membrane. The adjustable extension sleeve permits adjustment from a min of 1 1/4 (32) to a max of 4 (100) easily accommodating 2 3/4" (70) of varying insulation thicknesses. The positive threading allows smooth perimeter movement and circumferential support of the top at any adjusted elevation. A perforated stainless steel extension is supplied to retain the crushed gravel used in flat roof construction.

Regularly Furnished:
Duco Cast Iron Body with Adjustable Extension Sleeve, Perforated Stainless Steel Extension, Combined Flashing Clamp and Gravel Stop, and Polyethylene Dome.
Product Details
  • Product Type:  Roof Drain
Related Figure Numbers
  • 1037-R-C - With Sump Reciever Plate
  • 1038 - With Wide Flange Body
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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
  • Galvanized Cast Iron -G
  • Rough Bronze Dome -RBD


  • Expansion Joint (Specify Fig. 1710) - (Fig. 1010 Only)
  • Higher Gravel Stop -HGS (Specify Height)
  • L-Shaped Underdeck Clamp -CL
  • L Speedi-Set® Service Weight - 02(50), 03(75), 04"(100) Sizes Only (Fig. 1010 Only)
  • LXH Speedi-Set® Extra Heavy - 02(50), 03(75), 04"(100) Sizes Only (Fig. 1010 Only)
  • Sump Receiver -R
  • Underdeck Clamp -C
  • Vandal Proof - Dome - U
  • T Threaded Outlet
  • Solid Extension