110mm Underground Drainage Pipes And Fittings

The phrase 110mm underground drainage is a catch-all term that refers to a below-ground system of compatible pipework and fittings that has been built using pipes with a 110mm outside diameter. These systems are commonly used to carry foul water and surface water in domestic, commercial and other groundworks applications. You can take a look at our complete guide to 110mm underground drainage for a full exploration of how these systems work and where they may be used.

Many of Drainfast’s 110mm underground drainage pipes and fittings are made from uPVC, which provides long-lasting durability and strength, while its smooth internal surface supports efficient flow. The plastic material is also very lightweight, making transportation and installation far easier. Other components within the wider system may use materials such as rubber, aluminium or stainless steel depending on their function.

Put simply, plastic pipes and fittings such as these are lightweight, durable and resistant to corrosion. They are straightforward to handle and install, require minimal maintenance and have a smooth surface on the inside that supports efficient flow. All this combines to make uPVC a practical and cost-effective material for modern below-ground drainage systems.

Most often, 110mm underground drainage pipes are used for domestic and lighter-use commercial drainage, as well as in wider groundworks projects. Depending on job specification, they can form part of both foul and surface water drainage systems. Find out more in our expert 110 mm underground drainage guide.

A 110mm drainage pipe is measured by its outside diameter (OD), so the pipe itself has an external diameter of 110mm. This size is sometimes referred to as 100mm based on its internal diameter, or as a 4-inch pipe. Read our guide to underground drain pipe sizes for more information on how drainage pipes are measured, and check the specifications on each individual product page for clarification on exact measurements.

Our range includes plain-ended and single-socket pipes in both 3m and 6m lengths. We also stock a 6m single-socket half-perforated pipe for suitable surface water drainage applications. Explore the full range above.

In short, plain-ended pipes require a separate compatible coupler or fitting (such as a socket bend) to join individual lengths together, while single-socket pipes have an enlarged socket at one end, allowing another 110 mm pipe to connect directly. The right choice for your application will depend on the layout and connections required across your drainage run.

Our wide range of 110mm underground drainage pipe fittings includes bends in various angles, T and Y junctions, double-socket and slip couplers, reducers, gullies, rodding eyes, access caps, plugs, adaptors, wall seals and more. We also supply compatible inspection chamber bases and risers.

The plain end of a 110mm pipe can push into a compatible socket on another pipe or fitting, while plain-ended sections can be joined using suitable couplers. Bends, junctions and adaptors can then be used to create the required system layout. Read our guide to connecting underground drainage pipes for more information.

Yes. Drainfast stocks dedicated clay-to-plastic adaptors, as well as flexible fittings that connect 110mm plastic drainage pipes to existing pipes of different diameters and materials, including clay. Always select a connector designed for the dimensions and materials being joined.

Yes, suitable 110mm underground drainage products can be used for both foul and surface water systems. Our standard 110mm uPVC plain-ended and single-socket pipes are suitable for surface water and sewage drainage, while products such as our half-perforated pipe are specifically intended for surface water applications. 

Absolutely. Orders from our 110mm range that are placed before 5pm can be delivered the following day within our specified delivery zones. We also offer free delivery on orders over £150, helping you get the pipework and fittings you need on site without any unnecessary delays.