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Serving all of the USA, Canada, Australia and the Middle East, MIFAB can provide you with the quality, engineered plumbing and drainage solutions you need. Innovative product designs save the installer time and material cost and provides the owner with higher quality cast stainless steel drains and cleanouts for the same cost as the industry standard nickel bronze. Contact us today to learn more.

All Categories  > Roof Drains  > MH-501-28 SIPHONIC ROOF DRAIN OVERFLOW

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SPECIFICATION:MIFAB® / Hydromax Series MH-501-28 stainless steel siphonic roof drain with small anchor flange for gutter installation, ductile iron air baffle / inducer with Type 304 stainless steel allen key hardware.

Function:: Used in any type of roofs as a siphonic roof drain overflow system. The siphonic overflow roof drain is designed to accept water once the main siphonic roof drain is clogged or overwhelmed.


Item Name



Deck Opening

Deck Opening with Sump Receiver

Dimensional Drawing
File Not Found
Adjustable Strainer Type

Load Rating
Strainer Diameter
Grate Adjustment Min.

Free Area Rating
Grate Adjustment Max.

Strainer Size
Dome Type

Standpipe Adjustment Min
Standpipe Adjustment Max
Strainer Adjustment Max
Strainer Adjustment Min
Body Size

Length (A)

No Hub Pipe Size
1321 West 119th Street Chicago, IL 60643
Toll Free: 800.465.2736
Tel: 773.341.3030
Fax: 773.341.3047
E-mail: sales@mifab.com