Overflow | Plumbing Supplies

Keep your plumbing system safe, compliant and free from water damage with our range of overflow products at JJ Building Materials. Designed to prevent unwanted spills from tanks, cisterns and appliances, each overflow pipe and fitting in our collection provides reliable protection and efficient water discharge for both domestic and commercial installations.

Overflow Pipe for Safe Water Discharge

Our overflow pipe options are manufactured from durable, lightweight materials to ensure long-lasting performance. Easy to cut, install and connect, each overflow pipe is designed to divert excess water safely away from tanks, toilets, cylinders and cold-water storage systems — helping prevent leaks, damp and overflows. Available in both standard and high-flow sizes, these pipes offer dependable performance in all plumbing setups.

Durable and Versatile Overflow Solutions

From simple pipe lengths to connectors and elbows, our overflow components are built to withstand everyday use while providing consistent water flow. Suitable for use with plastic or copper systems, each fitting ensures a secure, watertight connection that’s ideal for loft tanks, toilet cisterns, condensing boilers and more.

Easy Installation for Domestic and Commercial Systems

Each overflow pipe is designed for quick installation with standard plumbing tools. Their lightweight, corrosion-resistant construction makes them ideal for both new builds and repair work. Whether you're a professional tradesperson or a DIY installer, our overflow range offers straightforward and reliable solutions.

Why Choose Overflow Products from JJ Building Materials

High-quality overflow pipe for tanks, toilets and appliances
Compatible with standard plumbing systems
Lightweight, durable and corrosion-resistant
Easy to install with secure, watertight fittings
Competitive pricing with fast UK-wide delivery

FAQs

What is an overflow pipe used for?

An overflow pipe carries excess water safely away from tanks or cisterns to prevent leaks, flooding or structural damage.

What size overflow pipe do I need?

Most domestic installations use standard-size overflow pipe, but high-flow options may be needed for larger tanks or appliances.

Can I replace an overflow pipe myself?

Yes — replacing an overflow pipe is typically straightforward for confident DIY users, but always ensure it is securely fitted and directed to a safe discharge point.

Check out our other Plumbing Supplies and Waste & Pipeworks range at JJ Building Materials.