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Figure Number: 1005
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1005Siphonic Roof Drain

Smaller Pipe Diameter, Single Point of Discharge, Reduced Material Cost, Eliminates Slab Penetration Costs

This labor-saving, 15 1/4" (390) siphonic roof drain can be installed from above the roof deck, solving the need for work inside or under the facility and significantly simplifying installation. For use in engineered siphonic drainage systems, this drain will clear heavy wastewater accumulations faster than traditional roof drains. Made of corrosion resistant Duco coated cast iron and topped by a polyethylene dome strainer, it can be installed in flat roofs of any construction.

Variation of this roof drain are available including features such as 2" Water Dam (-WD2), Top Mount Deck Extension Plate (-DEP),or Deck Plate (-RDP)

Pro Tip: The siphonic drain is just one component in a siphonic drainage system. These systems should always have the approval of a plumbing engineer, licensed in the locale where the installation is to occur.

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov - Learn More about this warning
Shows specifications for standard configuration. Configuration options may change specifications.
  • Variations
    Sump Receiver -R, Underdeck Clamp -C, Underdeck Clamp for 10" Deck Opening -C10, L-Shaped Underdeck Clamp -CL, Vandal Proof - Dome - U, (2) 3/8” (10) Tappings -TAP
  • Optional Materials
    Aluminum Dome -AD, Cast Iron Dome -CID, Galvanized Cast Iron Dome -CIDG, Galvanized Cast Iron -G, Rough Bronze Dome -RBD
  • Product Type
    Roof Drain
  • Benefit
    Labor Saving
SubmittalSubmittal 1005 Roof Drain (pdf)
View
Technical Drawings
1005 Roof Drain (dwg)Siphonic Roof Drain 15-1/4" (390 mm) Diameter - Low Profile Dome [1005Y | No-Hub Outlet]DWG195 KB
1005-WD2 Roof Drain (dwg)Siphonic Roof Drain 15-1/4" (390 mm) Diameter - Low Profile Dome, Flashing Clamp with 2" High Water Dam [1005Y-WD2 | No-Hub Outlet]DWG348 KB
1005 Roof Drain (rfa)Siphonic Roof Drain 15-1/4" (390 mm) Diameter - Low Profile Dome [1005Y | No-Hub Outlet]RFA372 KB
Literature / Videos
Submittal 1005-WD2 Roof Drain (pdf)Siphonic Roof Drain 15-1/4" (390 mm) Diameter - Low Profile Dome, Flashing Clamp with 2" High Water Dam [1005Y-WD2 | No-Hub Outlet]PDF639 KB
Submittal 1005-DEP Roof Drain (pdf)Siphonic Roof Drain 15-1/4" (390 mm) Diameter - Low Profile Dome with Top Mount Deck Extension Plate [1005Y-DEP | No-Hub Outlet]PDF489 KB
Submittal 1005-RDP Roof Drain (pdf)Siphonic Roof Drain 15-1/4" (390 mm) Diameter - Low Profile Dome with Deck Plate [1005Y-RDP | No-Hub Outlet]PDF397 KB
Submittal 1005-WD2-DEP Roof Drain (pdf)Siphonic Roof Drain 15-1/4" (390 mm) Diameter - Low Profile Dome, Top-Mount Deck Extension Plate, Flashing Clamp with 2" High Water Dam [1005Y-WD2-DEP | No-Hub Outlet]PDF383 KB
Submittal 1005-WD2-RDP Roof Drain (pdf)Siphonic Roof Drain 15-1/4" (390 mm) Diameter - Low Profile Dome, Deck Plate, Flashing Clamp with 2" High Water Dam [1005Y-WD2-RDP | No-Hub Outlet]PDF450 KB
Article: Fundamentals of Siphonic Roof DrainageArticle: Fundamentals of Siphonic Roof DrainagePDF4 MB
Article: Siphonic Roof Drainage: Where Is It Headed?Article: Siphonic Roof Drainage: Where Is It Headed?PDF516 KB
Article: "Are Proprietary Siphonic Roof Drainage Systems Necessary?"Article: "Are Proprietary Siphonic Roof Drainage Systems Necessary?"PDF370 KB
MGI Corporate Brochure (pdf)Who we are, Our History, Morris Group International TodayPDF8 MB
MGI Brands Flyer (pdf)MGI Brands Flyer (pdf)PDF712 KB
Siphonic Roof Drains Benefits Flyer (pdf)Flyer Siphonic Roof Drains BenefitsPDF5 MB
Specifications for Roof DrainsSpecifications for Roof DrainsDOC230 KB
Jay R. Smith Contractor Labor Savings and Prefabrication BrochureContractor Labor Saving Products Brochure (pdf)Contractor Labor Saving Products Brochure (pdf)PDF6 MB
Case Study Site Infrastructure Siphonic Roof DrainsCase Study Site Infrastructure Siphonic Roof DrainsPDF2 MB
Case Study Retrofit Application Siphonic Roof DrainsCase Study Retrofit Application Siphonic Roof DrainsPDF2 MB
Case Study The Marshall Erdman Building,Value Engineer Project - Siphonic Roof DrainsCase Study The Marshall Erdman Building,Value Engineer Project - Siphonic Roof DrainsPDF314 KB
Case Study A Value Engineering Solution, Carousel Center Mall - Siphonic Roof DrainCase Study A Value Engineering Solution, Carousel Center Mall - Siphonic Roof DrainPDF2 MB
1005 drain (hi res jpg)Siphonic Roof Drain 15-1/4" (390 mm) Diameter - Low Profile Dome [1005Y | No-Hub Outlet]JPG39 KB
Technical Data for Roof DrainsTechnical Data for Roof DrainsPDF2 MB
Parts Order Guide for Roof DrainsParts Order Guide for Roof DrainsPDF5 MB
Order Guidelines for Roof DrainsOrder Guidelines for Roof DrainsPDF120 KB
Quote Worksheet Smith Drainage SystemsQuote Worksheet Smith Drainage SystemsPDF36 KB
Presentation: Siphonic Roof Drains (ppt)Jay R. Smith Mfg Co. Siphonic Roof Drains - The level approach to roof drainage™ PPT6 MB
Siphonic Roof Drains Demonstration (video)Video Siphonic Roof Drains DemonstrationVideo
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Standard

1005Y
Standard Model
[submittal]

with Top Mount Deck Extension Plate

1005Y-DEP
With Top-Mount Extension Plate
[submittal]

Deck Plate

1005Y-RDP
With Deck Plate
[submittal]

With 2

1005Y-WD2
With 2" Water Dam
[submittal]

With 2

1005Y-WD2-DEP
With 2" Water Dam
Top-Mount Extension Plate
[submittal]

With 2

1005Y-WD2-RDP
With 2" Water Dam
Deck Plate
[submittal]