The PlumbHQ Compression Coupling Fittings collection brings together all the reliable straight and reducing couplings you need for robust connections on water, gas, and heating systems. This range is built for professional plumbers, installers, contractors, and trade-aware DIYers who want certainty on every job. It includes both equal compression couplings and reducing couplings in the most common UK sizes from 10mm through to 22mm, with both traditional brass and chrome finishes available.
Why Use Compression Coupling Fittings?
Compression couplings are the go-to for creating strong, leak-free joins between straight pipe runs or for transitioning between different pipe sizes. Whether you are working with copper or plastic pipework (with correct inserts), these fittings make the process quick, clean, and secure—without the need for heat or soldering. Plumbers and installers rely on couplings to extend, repair, or reconfigure pipe systems on site, making compression couplings a key part of any professional kit.
Our couplings are ideal for both potable water and low-pressure gas systems, as well as central heating circuits. The mechanical nature of the fitting means you can demount and reuse them as needed, offering real-world flexibility for maintenance or future changes. When you need a non-permanent, reliable joint, a compression coupling delivers every time.
Strong Construction and Certified Quality
The core of this collection is simple: uncompromising quality. All PlumbHQ compression couplings are made from high-grade brass, known for its strength and resistance to corrosion. Options include classic brass or polished chrome for exposed pipework. Every fitting in the range is WRAS approved, confirming its suitability for use in UK drinking water installations and meeting all relevant regulations. Couplings comply with BS EN 1254-2 for fittings and are compatible with pipework to BS EN 1057, so you can install with total confidence that you’re up to industry standards from the outset.
Pressure tested to PN16 (16 Bar) and able to withstand operating temperatures up to 110°C, these fittings are suitable for demanding applications in both domestic and commercial environments. The 25-year manufacturer guarantee (Flowflex) reinforces the trade reputation behind every fitting in this collection—standard you can rely on for the long haul.
Main Product Types and Sizing
Within the Compression Coupling Fittings collection, you’ll find:
- Straight Couplings: Perfect for joining two straight runs of equal diameter pipe. Suitable for clean inline connections in any system.
- Reducing Couplings: Allow you to join pipes of two different sizes neatly and securely, particularly useful during upgrades or across mixed installations.
Common UK sizes such as 10mm, 15mm, and 22mm are fully supported, with reducing options (like 15mm x 10mm or 22mm x 15mm) for system transitions. Both brass and chrome versions can be matched to your installation needs, from hidden pipework to exposed installs where finish matters.
Multi-pack options (10 or 20 per pack) are available to meet the full scale of the job—whether you are stocking up for regular site work or tackling a larger project straight away.
Where These Fit in Your Project
Compression couplings are designed to fit seamlessly into any standard UK plumbing system. Their ease of installation makes them a first choice for maintenance, upgrades, and tight deadlines. No flame, no cure time—just cut, slide on the olive, and tighten the nut for a tested, robust seal. Demountability means changes or repairs do not involve major disruption, so system upgrades or repairs stay straightforward.
For full compatibility and system matching, explore related collections, including:
- Main Compression Fittings collection – covers every standard fitting needed for a full system install.
- Compression Olives – for secure, watertight joins with every coupling.
- Compression Tee Fittings – for branching systems and more complex layouts.
- Compression Elbow Fittings – for changing direction in pipework while maintaining mechanical joint strength.
- Chrome Compression Fittings – for installations needing matched chrome components throughout.
What Sets PlumbHQ Apart
PlumbHQ is built around reliable supply, accurate product information, and no-nonsense customer support. Every fitting in this range is clearly documented for technical specification and system use. You will always know what you are getting—no confusion, just honest detail. We prioritise quick, convenient delivery and reliable service to keep your job on track, with a trade-savvy team ready to support your queries.
Ready to Get Started?
Browse the full Compression Coupling Fittings range now to find the coupling that fits your spec. From tough brass builds to practical chrome, equal or reducing, this collection has what you need for strong, compliant connections—every single time.
