MDPE Pipe

Learn more about MDPE pipe

MDPE stands for Medium Density Polyethylene. MDPE pipes are flexible, tough and corrosion resistant, which makes them well suited to underground water service runs where you need a long, reliable length that copes with ground movement.

Blue MDPE pipe is used for below ground potable water supply in the UK, so the colour helps identify the pipe on site. It sits within your wider plumbing and heating work as the service pipe that carries the cold water supply from the main into the building, before you transition to internal pipework.

When you're comparing pipe types, MDPE water pipe is chosen for its flexibility and ease of handling in trenches. It's a different product from internal copper or plastic push fit runs, so treat it as the underground service element of the system rather than a like for like swap.

Typical uses

• External cold water supply runs from the mains into a property.

• Underground service connections where MDPE pipe is the suitable option for the application.

• Domestic and light commercial water supply where 25mm water pipe is a common size.

• MDPE pipe for mains water where a flexible, corrosion resistant service pipe is needed.

• Irrigation and outdoor water feeds where the application suits medium density polyethylene pipe.

How to choose the right MDPE pipe

• Check the product specifications against the job before you buy, including intended use, pressure rating, size and suitability for the planned underground installation.

• Use the colour to identify the application. Blue pipe for water signals below ground potable supply on site.

• Match the pipe to compatible MDPE pipe fittings so the joints suit the diameter and the fixing method.

• Decide between coiled roll lengths and shorter runs. Longer roll lengths can reduce the number of joints on a straight run, while shorter lengths can be easier to handle in tight trenches.

Before you order

• Check the intended use, pressure rating, size and suitability for the planned underground installation before you buy.

• Make sure the pipe and fittings are compatible, and confirm the joining method you plan to use suits both.

• Allow for bends, connections and site wastage when you work out how much pipe to order.

• If you need a hand, our branch teams offer specialist product expertise and trade advice, backed by reliable stock availability across our nationwide branch network.

Explore our range of MDPE pipe

Browse our range, including blue MDPE pipe and the common 25mm water pipe sizes tradespeople need most. Check stock at your local branch or buy online for free Click & Collect or delivery, and speak to our team if you want help matching pipe and fittings to your project.