How to Install Twinwall Drainage

Twinwall drainage is extremely robust and one of our best-selling systems. If you’ve ordered yours and aren’t sure what to do next, find out all you need to know about how to install is below..

What is Twinwall Drainage?

Twinwall drainage, as the name suggests, is a two walled drainage pipe consisting of an inner and outer tube that are welded together. The inner tube is smooth and assists with the flow of water, and the outer wall is corrugated for compressive strength and protective purposes.

Twinwall drainage can either be solid (unperforated), and these pipes carry the water to a collection point external from the main system. Perforated, or filter twinwall drainages pipes, have small holes along the pipe to help carry, collect and eventually disperse of the water.

Where Can I Install Twinwall Drainage?

Twinwall drainage is available in a number of sizes. Because of this, it can be used for a variety of applications. It is often used for field drainage and agricultural situations to remove surface water, or for roads and highways drainage. Twinwall drainage can also be used for domestic driveways, making it one of the most versatile forms of drainage available.

Which Size Twinwall is Right for Me?

Generally, the smaller the application (e.g. in domestic settings) the smaller the size of twinwall needed, and the same for larger applications – larger twinwall pipe will be needed.

For smaller fields, driveways, gardens and other domestic settings, 110mm or 150mm twinwall should be suitable, whereas anything up to 600mm could be more appropriate for commercial applications.

Installation – Step By Step

Twinwall drainage is ordinarily installed using a trench style method. This involves the following steps:

  1. Dig a trench the same length as the distance of your inlet to outlet point, and between 300mm-600mm deep on top of the height of your twinwall pipe, plus room for a pipe bed of at least 150mm.
  2. Fill the trench with crushed stone or pea shingle for appropriate bedding and to stop the drain from moving.
  3. Cut your pipe to the correct length to fit - they can be cut anywhere along the external ribs using a standard handsaw.
  4. Lay your pipe and all necessary connections.
  5. Place and compact further pipe embedment material (crushed stone or pea shingle) up to 12 inches above the top of the pipe.

Shop our range of twinwall drainage at great prices today, or for more information, get in touch with our expert team who are happy to assist.