Underground Drainage

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In this section, you will find all of our standard 110mm & 160mm PVC underground drainage systems - these are popular products that are used in everyday drainage projects including our underground drainage pipes. We offer single or bulk purchase options - our bulk purchases page below is ideal for buying materials for a whole site or project. You can also buy subfloor ventilation products in this section.

All of our underground drainage pipes and the majority of our fittings are manufactured from UPVC, and all pipe, bends, gullies and connectors in the drainage system are commonly manufactured in a Golden Brown colour.

In this section you will find standard 110mm and 160mm pipes and fittings; as well as channel drainage (slotted drains for use in draining stormwater from driveways and patios), sewage treatment plants for properties that are not connected to mains drainage and subfloor ventilation products that are generally installed when the first drainage fittings are introduced to the site.

FEATURES & BENEFITS OF THE 110MM & 160MM DRAINAGE SYSTEM

Our 110mm Drainage, which is the most common size for domestic drainage in the UK, is manufactured to BS-EN 1401 and BS 4660.

All of our underground drainage pipes and the majority of our fittings are manufactured from UPVC, and all pipe, bends, gullies and connectors in the drainage system are commonly manufactured in a Golden Brown colour.

COMPATIBILITY WITH SOIL & WASTE SYSTEMS

Our underground drainage products are fully compatible with our above ground soil and waste systems.

In this section you will find all of the most commonly used drainage bends and different types of connectors and adaptors along with gully traps and other basic components of the drainage system. This system is interchangeable with all other leading manufacturers 110mm and 160mm systems.

What is underground drainage?

Underground drainage is the general term given to the system of pipes and fittings that is installed below ground level to transport foul drainage or rainwater flows to a sewage treatment facility or, in the case of rainwater, a soakaway or water course.

Most underground drainage systems today are manufactured in PVC-u, which is hardwearing and virtually maintenance free. The smooth inner wall of the pipe also promotes a much better flow when compared to traditional materials.

Underground drainage pipes and fittings are almost always terracotta orange in colour. This makes identification easy, as soil pipes installed above ground level are usually black, grey or white.

How do you install underground drainage?

Underground drainage is usually laid in a trench that has been lined with a bed of pea shingle. The installation must be laid to the correct fall and should always follow the basic drainage design principle that all points in the drainage system should be accessible for testing, inspecting and cleaning.

It is always a good idea to plan all drainage installations in advance – most building projects in the UK will include a drainage layout drawing that has been designed by the architect. The key components in terms of design location are generally gullies, inspection chambers, rodding eyes and rainwater adaptors.

To learn more about underground drainage installation, please watch our detailed video on the subject.

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