3950 thru 3955Sanitary Drain Fixed Air Gaps

Our Duco coated cast iron Fixed Air Gaps are installed between a fixtures waste outlet and the facility’s drainage system to protect the fixture from contamination should the drainage system experience reverse pressure such as in flooding situations. Air Gaps may also be installed in a water supply to a fixture or appliance to prevent contamination from cross connection between the potable water supply and the fixture that handles a contaminating liquid.

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov - Learn More about this warning
Shows specifications for standard configuration. Configuration options may change specifications.
  • Optional Materials
    Cast Bronze -CB, Chrome Plated -CP - Bronze, Chrome Plated Cast Iron -CPCI
  • Product Type
    Sanitary Floor, Area and Indirect Waste Drain
Technical Drawings
3950-3955 Air Gaps CAD DrawingsFixed Air Gaps [3950T | Stout Air Gap, Threaded Outlet; 3951T | Elongated Air Gap, Threaded Outlet; 3955S | Elongated Air Gap, Spigot Outlet; 3955Y | Elongated Air Gap, No-Hub Outlet] DWG88 KB
Literature / Videos
Article: Considerations to be Addressed When Selecting Sanitary Floor DrainsArticle: Considerations to be Addressed When Selecting Sanitary Floor DrainsPDF270 KB
Specifications for Sanitary Floor DrainsSpecifications for Sanitary Floor DrainsDOC327 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
Technical Data for Sanitary Floor DrainsSani-Ceptor, Funnel-Ceptor, Roof-Ceptor Technical Data PDF599 KB
Order Guidelines for Sanitary Floor DrainsOrder Guidelines for Sanitary Floor DrainsPDF115 KB
Parts Order Guide for Sanitary Floor DrainsPDF2 MB
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Fixed Air Gaps

Stout Air Gap
Figure Number 3950T
Stout Air Gap
with Threaded Outlet









Figure Number 3951T
Elongated Air Gap
with Threaded Outlet

Figure Number 3955S
Elongated Air Gap
with Spigout Outlet (not shown)

Figure Number 3955Y
Elongated Air Gap
with No-Hub Outlet (not shown)