TPE Downpipe Outlets (Perforated Flange)

TPE Downpipe Outlets (Perforated Flange)

Wallbarn Ltd

Drainage outlet shape for downpipes on flat roofs manufactured from TPE compound for through for bonding to bitumen based waterproofing membranes in a sandwich technique. Ideal for hot melt and felt.

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+44 (0)20 8916 2222

Tough, durable and flexible drain connector, used for downpipes and circular outlets on a roof or terrace within the main body of a concrete deck. It is suitable with SBS and APP bituminous membranes, including built-up felt, mastic asphalt, hot melt and other liquid applied membranes and consists of a pipe which is inserted into a hole to connect to the outlet drainage pipe and a flange which is sandwiched between two layers of waterproofing membrane. The flange is perforated with a series of holes around the profile to allow the membrane underneath to pass through the holes and give a secure bond when the second layer of membrane is installed above it.

The pipe is manufactured in a slight cone shape to give easy installation and to prevent it from rising out of the hole. There are also two rings on the exterior of the pipe, which help to ensure that no water can travel back up. The drain connectors are designed to sit inside an HDPE outlet pipe with a snug fit and a range of size options are available in relation to the relevant outlet pipe size.

General information




UV resistant, can withstand a temperature of up to 120°C, can be fitted on multiple outlets, tough flexible and durable material


Thermoplastic elastomer




240 x 280 x 69 x 64 x 74 mm

Specification data

Product Reference

TPE Drain Connectors and Outlets


240 mm

600 mm

Where outlet pipes are passing through thick insulation or industrial roofing.

Outlet pipe (diameter)

40 mm

Not available with 600 mm height.

60 mm

Not available with 600 mm height.

75 mm

Not available with 600 mm height.

80 mm

90 mm

100 mm

110 mm

125 mm

140 mm

150 mm

160 mm

200 mm


Not required


To suit drainage outlet



Gravel excluder

Leaf guard

Standard product features


Thermoplastic elastomer (TPE), a compound of ethylene-propylene diene monomer (EPDM) and polypropylene.

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