Flat Roof Drain with Dome Strainer for 110 mm Pipe

What it is

A rainwater outlet for flat roofs and terraces that discharges into a 110 mm pipe. The listing images in our product file show it in four parts: a dome strainer cover, a fixing ring, a main body with a round flange and an outlet spigot below it, and a large sealing gasket fitted on the end of that spigot. The flange carries fixing holes; the body, ring and gasket are black and the dome is silver-grey. The listing describes the set as “easy to assemble”.

What the file leaves open matters for a roof: no brand or model, no material for the body or the dome, and no flange diameter, height, spigot diameter or flow rate. Plastic or metal, the photos alone cannot settle it, so the materials stay blank until the supplier confirms them. Types of outlet and how they are sized are covered on the roof drains page.

How it is used

Going by the parts in the listing images, each piece has its own job. The flanged body is built into the roof waterproofing, the fixing ring clamps the membrane against the flange, the dome strainer keeps leaves and debris out of the outlet, and the spigot with its gasket connects to the 110 mm pipe below.

The listing gives no fitting instructions. Our file does not say how the gasket seals against the pipe, whether the ring is held by screws or clips, which membranes it suits (torch-on bitumen, PVC or TPO), or whether fixings come in the box.

Drains built the same way by other makers use different materials. The Portals Plus ABS reroof drain has a UV-stabilised black ABS body, an epoxy-coated cast aluminium clamping ring and an expanding band that seals the outlet inside the existing pipe; a Worbiz plastic roof drain pairs a PVC body with a powder-coated aluminium collar. Both are sold in inch sizes, so they are similar products only, not confirmed for this item. For bitumen membrane roofs, the Water-Based Bitumen Primer for Waterproofing Membranes is also in stock, and the waterproofing section covers the layers of a flat roof.