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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  > R1150-SPEC Series - Combined Roof Drain and Secondary Overflow System with Loose Set Sump Receiver
R1150-SPEC Series - Combined Roof Drain and Secondary Overflow System with Loose Set Sump Receiver

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Specification: MIFAB Series R1150 combined roof drain and secondary overflow system, consisting of a galvanized sump receiver; two lacquered cast iron roof drain bodies with anchor flanges, cast iron waterproofing membrane clamp rings with integral gravel stops, one 4" (102) diameter adjustable ABS overflow standpipe and two self-locking metal dome strainers with a free area of 43 square inches each.

Function: Used in any type of conventional or flat roofs where a safety overflow, which receives water only when the accumulation is greater than the height of the standpipe is required to be located beside a standard roof drain. The standpipe can be adjusted to attain the desired overflow water depth. Dome provides for efficient drainage of rainwater and preventsdebris from entering the drain line. Anchor flange and membrane clamp with tongue in groove design provides for secure grip of membrane and roof flashing materials.

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
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Fax: 773.341.3047
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