The adjustable riser element, h=300mm, SafeKIT D125 with PVC insulating flange (D355), is used to extend the height of terrace roof drains when the waterproofing is a PVC membrane. The continuity of the waterproofing in the drainage area is achieved in the same manner as on the rest of the surface, for example, by hot air welding, characteristic of PVC membranes. It can be used both when a second layer of waterproofing (or vapor barrier) needs to be fixed to the insulating flange, and when the thickness of the terrace roof layers requires it. It is treated as an accessory for elements collecting rainwater from terrace roofs or balconies and directing it towards the building’s drainage system. -Materials: PP. -Components: riser element, DN125 gasket. -Installation height: 300mm. -Complies with EN 1253.