TPE is a compound of EPDM and polypropylene, developed as a cost-effective way to waterproof and protect drainage holes and outlets on roofs and balconies in conjunction with bituminous waterproofing membranes. The material is tough, flexible and durable.

It is UV stable and resistant to deterioration by normal atmospheric elements and ground salts. It can withstand a temperature of 120°C and will not become brittle at very low temperatures.

These outlets, collars and vents are ideal for SBS and APP bituminous membranes, including built-up (felt), mastic asphalt, hot melt and other liquid applied membranes.

They are designed to be sandwiched between two layers of waterproofing membrane and installed whilst those two layers are still tacky, to ensure that an over-and-under bond is created, producing a secure fix.

These drain connectors are designed to sit inside an HDPE drainpipe with a snug fit. It is important, when measuring, to ensure that the outer diameter of the Wallbarn drain connector can fit inside the inner diameter of the pipe, especially when some HDPE pipes are measured in inches rather than metric. They are measured is as follows:

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 diameter of the HDPE drainpipe (which is often measured in imperial measurements).

Datasheets

TPE Circular / Downpipe Outlets With Perforated Flange

NBS Source

BIM Library

• TPE Downpipe Outlets (Perforated Flange)

Wallbarn can also supply drain connectors with a 600mm long shank, where outlet pipes are passing through things such as thick insulation or industrial metal roofs.

Fitted and secured in exactly the same way as the standard drain connector, being sandwiched between two layers of waterproofing membrane, they are designed to pass through the entire section of roof and into the downpipe, and so eliminate the need for multiple connections and extension fittings (which always carry the risk of leaks around each connection).

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

Datasheets

TPE Extra Long Circ. Outlet (Perforated Flange)

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 well at the top and also the outer diameter of the leaf guard

The circular / downpipe outlets with smooth flange are available in the following sizes:

Remember installers of these outlets will always need to insert leaf guards or gravel excluders into the mouth of these connectors to prevent the pipes becoming blocked.

We have a range of leaf guards and gravel excluders to further enhance this product.

Datasheets

EPDM Circular Roof Outlet (Smooth Flange)

NBS Source

BIM Library

EPDM Downpipe Outlets (Smooth Flange)

These connectors are most commonly used for 4 inch drainpipes, but we can supply them in a range of sizes

Sizes (measured in mm) are as follows:

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).

Remember installers of these outlets will always need to insert leaf guards or gravel excluders into the mouth of these connectors to prevent the pipes becoming blocked.

We have a range of leaf guards and gravel excluders to further enhance this product.

NBS Source

• Close
  EPDM Downpipe Outlets (Perforated Flange)

BIM Library

• EPDM Downpipe Outlets (Perforated Flange)

Wallbarn has an ingenious product designed to improve the environment around drainage holes on roofs and podium decks. These products specifically target any unwanted smells and are particularly useful on terraces or balconies, where greater pedestrian presence is anticipated, where the deck is used for dining, for example.

The SIPHON outlet is a variation on the design of the standard drain connector in EPDM which incorporates the perforated flange and spigot but also contains a siphon mechanism to help eliminate bad smells and odours emitting from the drainpipe up to the roof or deck.

As water drains off the roof a small amount will be held in a well-type section, effectively sealing the drainpipe, in a similar way to a U bend beneath a sink unit. As the rainwater runs off the roof and into the outlet, the water level will rise over the internal lip and then flow into the drain pipe.

Where the roof deck is being used as leisure area, users can be assured that any “drain smells” are blocked out.

A is the height of the spigot or pipe

B is the height of the well – where the water will collect to block out the bad smells, and the excess flow into the pipe

C is the outer diameter of the flange or surrounding ring

D is the inner diameter of the pipe at the top

E is the inner diameter of the pipe at the bottom

F is the outer diameter of the well at the top and also the outer diameter of the leaf guard

G is the outer diameter pipe at the top

Sizes (measured in mm) are as follows:

Applicators do not need to fasten separate leaf guards using the SIPHON outlet as it comes with integrated surface protection.

Datasheets

EPDM Special SIPHON Outlet

NBS Source

BIM Library

• EPDM SIPHON Outlet

The PVC circular/downpipe outlets are measured in the same way as the other materials, but please ensure 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 diameter of the HDPE drainpipe (which is often measured in imperial measurements).

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

Extra-long connectors are also available for industrial roofs.

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

We have a range of leaf guards and gravel excluders to further enhance this product.

Datasheets

PVC Circular Roof Outlet (Smooth Flange)

NBS Source

BIM Library

PVC Downpipe Outlets (Smooth Flange)