15mm Compression Fittings

15mm compression fittings are a practical choice when you need to join standard domestic pipework quickly without soldering, heat or specialist press tools. That makes them especially useful for repairs, alterations and first-fix or second-fix jobs where access is awkward or hot works are best avoided. Because the joint is mechanical, many installations can also be dismantled later, which helps when you need to service, extend or alter existing pipe runs.

This collection is built around one of the most common pipe sizes used in UK homes. You will often find 15mm pipe on hot and cold water services, radiator connections and feeds to taps and toilets. The key point is to match the fitting to your actual pipe size. The 15mm label refers to the pipe connection size, not to a single fitting style, so it is worth checking your existing pipework before choosing.

Within the range, the main difference is the job each fitting is designed to do. Couplings are commonly used to join straight runs. Elbows help where the pipe needs to turn. Tees allow you to branch off to another run, while stop ends cap a line neatly. There are also adaptors, tap connectors, wallplate elbows, tank connectors, repair couplings and reducing fittings for installations that need a change of thread, layout or pipe size.

That variety matters because two fittings can share the same 15mm compression connection while serving very different purposes elsewhere in the joint. Some products in the range are equal fittings, while others reduce to 12mm, 10mm or 8mm, or adapt to threaded connections such as 1/2 inch or 1/4 inch. You will also see brass and chrome-finished options in the collection, which can be useful where part of the fitting may remain visible.

Before you choose, compare the catalogue details for the fitting geometry, material, approvals and intended application rather than assuming every 15mm compression fitting suits the same pipe material or plumbing system. If you already know the fitting type you need, you can narrow your options further with Compression Coupling Fittings, Compression Elbow Fittings or Compression Tee Fittings. Once you have confirmed the pipe size and fitting function, it is much easier to pick the right part for the job.