Bauder Parapet Emergency Overflow Stainless Steel DN 70

Emergency overflow

A stainless-steel Parapet Emergency Overflow with an 800mm long spigot. Comes with a fixing plate and fixing plate flange.

For use with Bauder bituminous waterproofing membranes and Liquid applied membranes. It is used in conjunction with other roof drainage outlets to ensure that there is no water ingress into the building and that the structural load of the roof is not exceeded and provides a visible warning that the roof is holding excessive water.

The fixing plate and fixing plate flange are used when the parapet is insulated (warm roof upstand). The insulation can be clamped between the plate and the overflow outlet.

They are not suitable or intended for connection to internal pipework that is within a wall construction or boxed in and is inaccessible after construction. It is often part of a Blue Roof specification and can be used with Bauder membranes. Visible emergency overflows are recommended as part of NFRC Blue Roof guidelines.

This product does not require a Declaration of Conformity (DoC) or Declaration of Performance (DoP).

  technical Data sheet 

Product information

Characteristic Unit Value
Material - stainless steel
Colour - silver
Spigot length mm 800
Overflow opening width mm 70
Width of spigot  mm 75
Weight mm 3.1
*Flow rate performance data using a 35mm head of water (including leaf grille), based upon requirements of BS EN 12056:3:2000. Further flow rate performance data can be obtained within this document. For bespoke drainage calculation performance data, please contact Bauder Limited.

All further technical information is stated on the data sheet.