160mm Underground Drainage Pipes And Fittings

Generally, 160mm underground drainage pipes are used for handling large volumes of wastewater or surface water in both commercial and domestic applications. The system is also well suited to situations where only lower gradients are possible, allowing for higher flow. Its size even lends itself to terraced properties, which share a drainage network. 

Yes, 160mm is one of two common pipe sizes used for underground drainage. The 160mm system tends to be used for larger installations, such as small commercial properties or large domestic sites. The other most common size, the 110mm system, which we also stock, is more typically used for domestic setups.

The most commonly used material for 160mm underground drainage pipes is unplasticised polyvinyl chloride, or uPVC for short. Most of the drainage pipes we supply are uPVC, but we also stock PVC, P/E, aluminium and rubber products.

Plastics, and uPVC in particular, are favoured as they’re strong, easy to cut and corrosion-resistant, meaning they’re simple to work with and last a very long time. Additionally, they’re cost-effective to produce, making them more affordable. 

We offer a wide range of 160mm drainage pipe fittings, including sockets, junctions, caps, rodding eyes, seals, non-return valves, adaptors, pipe brackets, plates, threaded bars and more. Our entire range is made with high-grade materials and available with fast shipping.

A 160mm drainage pipe is measured by its outside diameter (OD), meaning the pipe itself has an external diameter of 160mm. It may also be referred to as a 150mm pipe based on its internal diameter, or as a 6-inch pipe. Read our underground drain pipe sizes guide for more information on how drainage pipes are measured, and see the specifications on each product page for further details on how measurements are taken on each item.

Our 160mm drainage pipe range includes plain-ended and single-socket pipes in both 3m and 6m lengths. We also stock a 6m single-socket half-perforated pipe. You can explore our full range of 160mm products at the top of the page.

The connections across your 160mm drainage system will ultimately depend on the pipe and fitting type being used. Single-socket pipes allow adjoining pipe ends to slot directly into the socket, while plain-ended lengths can be joined using double-socket or slip couplers. Junctions, bends and adaptors can then be added where the run changes direction or needs to connect into other pipework. Read our guide to connecting underground drainage pipes for more information. 

Absolutely, we’ve been thorough with our product range to ensure it contains everything you may need to integrate your new system with existing pipework. Where a 160mm drainage run needs to meet smaller or older pipework, we stock several suitable fittings, which include 160/110 mm unequal T and Y junctions, a dedicated 160 mm clay-to-plastic adaptor and a wider range of flexible adaptors and connectors for compatible pipes of different sizes and materials. 

The size that suits your project best will depend on your application. For example, 110mm pipes are generally better suited to domestic applications, whereas 160mm underground drainage pipes are typically recommended for larger domestic or smaller commercial usage. If you’re struggling to decide which size you need, we have a more detailed comparison in our 110mm vs 160mm underground drainage pipes guide, or you can get in touch with our team for expert advice.