Couplings

Wallbarn supplies a range of couplings for use in securing the drainage outlet to the HDPE drainpipe.

SQUARE SHAPED SPIGOT

Couplings manufatcured with a square mouth one sideare designed for use where the through-wall outlet is connected via a right angle to a rounded drainpipe. The square shaped spigot (such as the unit found on pages PVC corner / parapet / through wall outlets and Corner / Parapet / Through Wall Outlets In EPDM For Mechanical Fixing) is placed inside the square mouth of the coupling and the rounded downpipe section is fitted inside the HDPE pipe. A jubilee clip can be used around the drainpipe to give a secure fit.

These units are available in a number of different sizes.

RIGHT ANGLE COUPLING FOR USE WITH ROUND SPIGOTS

Wallbarn also supplies couplings for use with rounded spigots. Through-wall roof outlets (such as those found on page TPE Circular / Downpipe Outlets With Perforated Flange) installed either vertically or horizontally can be fitted to the HDPE drainpipe using the right angled “elbow” coupling connector.

They are available in a variety of sizes:

ROUND SPIGOT STRAIGHT COUPLING

A straight coupling is available for fixing a Wallbarn outlet with a round spigot to a round HDPE drainage pipe when the drainpipe is going in the same direction.

These can be used for through-wall outlets which have a round spigit (such as units on page PVC Corner / Parapet / Through Wall Outlets) and also downpipe and circular drainage outlets (such as units on page EPDM Circular / Downpipe Outlets With Perforated Flange)

The spigot again fits inside the coupling and additional secure fit can be achieved by tightening a jubilee clip around the outside.