Wallbarn also supplies outlets and drain connectors in PVC. These materials are not manufactured with perforated flanges, but they are all designed to be heat bonded to the PVC membrane, achieving a seamless bond.

They are designed to be inserted into the drainage pipe as with the other products, but they should be used only with compatible waterproofing membranes, so installers and specifiers should be sure to check with the waterproofing manufacturer.

The top of the shank has a serrated inner edge, which helps to anchor the leaf guard or gravel excluder into the hole securely.

Please see our leaf guard & gravel excluder page for more details of the correct type to use for your purposes.

See the CAD images here

The PVC circular outlets are measured in the same way as the other materials, but please censure the code numbers are correct when ordering :

H is the height of the spigot or pipe

D1 is the outer diameter of the flange or surrounding ring

D2 is the inner diameter of the pipe at the top

D3 is the inner diameter of the pipe at the bottom

D4 is the outer diameter of the pipe at the top
which needs to be smaller than the inner diamter of the HDPE drainpipe (which is often measured in imperial measurements).

Installers will require Leaf guards & gravel excluders for these outlets.

See the CAD images here

Extra-long connectors are also available for industrial roofs.

Leaf guards & gravel excluders will also be required for extra-long connectors.

Remember to see our CAD images section for help with drawing details of the roof.