Large General Purpose Roof Drains with Adjustable Extension

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Large General Purpose Roof Drains with Adjustable Extension

Figure Number:  1015
Labor Saving

Figure 1015 is a large general purpose roof drain with a side outlet.

Easily Adjusts to Accommodate Variations in Insulation Depth

Learn More on Contractor Labor Saving Products

Pro Tip:
Every bit of savings counts on a big job. When you choose an adjustable roof drain you eliminate the need to order multiple extensions in varying heights.

Contractors appreciate the fact that this roof drain can accommodate the inevitable inconsistencies in roof insulation thickness. Simply spin the adjustable extension to fit insulation from 1-1/4 to 4 inches (32 to 102 mm) thickness.

Product Function:
Used in flat roofs of any construction. The adjustable extension sleeve permits adjustment from a minimum of 1-1/4 inch (32 mm) to a maximum of 4 inches (102 mm), easily accommodating up to 2-3/4 inch (70 mm) of varying insulation thicknesses. The positive threading allows smooth perimeter movement and circumferential support of the top at any adjusted elevation. Large low profile dome provides sufficient free area for quick drainage of rainwater and protection against debris.

Labor Saving Features:
  • Large, low profile dome for quick drainage and production against debris.
  • Adjustable extension for different installation thicknesses
  • Wide clamping surface to hold flashing and roofing materials
  • Reversible Collar allows for Low Position and High Position ranges

Regularly Furnished:
Duco Cast Iron Body with Adjustable Extension Sleeve, Reversible Collar, Combined Flashing Clamp and Gravel Stop, with Polyethylene Dome.
Product Details
  • Product Type:  Roof Drain
  • Benefit:  Labor Saving
Related Figure Numbers
  • 1015-08 - For 8" Outlet
  • 1015-39 - With Low Profile Mesh Dome
  • 1015-E - With Specified Height Extension
  • 1015-RDP - With Wide Deck Plate
  • 1015-SO - With NO-HUB Side Outlet
  • 1015-WF - 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)
  • L-Shaped Underdeck Clamp -CL
  • L Speedi-Set® Service Weight - 02(50), 03(75), 04"(100) Sizes Only
  • LXH Speedi-Set® Extra Heavy.
  • Secondary Flashing Clamp -C2
  • Sump Receiver -R
  • Underdeck Clamp -C
  • Vandal Proof - Dome - U
  • Side Outlet Drain (Specify Fig. 1025)
  • T Threaded Outlet