Our GRP Roof Drain Round Rainwater Outlet 100mm has a certified fibre-glass mesh flange with a specialised knurled surface on both sides that improves the bonding of liquid waterproofing materials.
On the upper part of the spigot, small steps allow the dripping of water coming from any upper infiltration.
Fully adhering to the roof membrane to form one complete system, our GRP Roof Drain Round Rainwater Outlet is durable and weatherproof.
For smaller sized GRP Drain outlets, please visit the GRP Roof Drain Round Rainwater Outlet 50mm or GRP Roof Drain Round Rainwater Outlet 75mm product page.
These are made to be used and inserted into the drainage pipe, but they should only be used with compatible waterproofing membranes.
