Back Pressure Seal
The back pressure seal is for sealing between roof outlets and downpipes. With its lip seal design it is approved for resisting a water pressure of 1 metre water guage, and it fits DN downpipe dimensions.
To be placed on the roof outlet pipe when this is inserted into the downpipe. The seal design is type-approved and can resist a pressure of 1 metre water guage. When installed, the seal should be placed no more than 1 metre below the highest possible water level.
The back pressure seal is made from EPDM rubber, hardness 65 HV.
Tested and certified by TÜV Rheinland in accordance with EN 1253.