image

Couplers & Reducers

Shop compression pipe reducers and couplers for joining or stepping down copper and steel pipework. Reducers come in straight and threaded configurations — check the thread type and pipe diameters before ordering, particularly if you're joining metric to BSP or stepping from 22mm down to 15mm on an existing run. Female-to-male and male-to-male options available in BSPP and metric. Free delivery on orders over £200 to England and Wales.

  • BSPP Female x Metric Brass Compression Straight Coupling

    BSPP Female x Metric Brass Compression Straight Coupling

    From
    £1.54 INC VAT
    £1.28 EXC VAT

    View Product
  • Brass Compression Reducing Straight Coupling

    Brass Compression Reducing Straight Coupling

    From
    £2.38 INC VAT
    £1.98 EXC VAT

    View Product
  • BSPP Male x Metric Brass Compression Straight Coupling

    BSPP Male x Metric Brass Compression Straight Coupling

    From
    £2.06 INC VAT
    £1.72 EXC VAT

    View Product
  • Brass Compression Straight Equal Coupling

    Brass Compression Straight Equal Coupling

    From
    £2.33 INC VAT
    £1.94 EXC VAT

    View Product
  • Brass Compression Reducing Elbow, 22mm x 15mm

    Brass Compression Reducing Elbow, 22mm x 15mm

    £9.62 INC VAT
    £8.02 EXC VAT

    View Product
  • Brass Compression Straight Tap Connector

    Brass Compression Straight Tap Connector

    From
    £5.20 INC VAT
    £4.33 EXC VAT

    View Product

Pipe couplers and compression reducers

A coupler joins two pipes of the same diameter end-to-end. A reducer joins two pipes of different diameters. Both are standard requirements in any pipework installation where sections need to be connected or where a supply run steps down to a smaller distribution leg.

The range here covers compression-type fittings for copper and steel pipe, along with threaded versions in BSPP and metric. When ordering, confirm the pipe outside diameter and the thread standard on both ends — metric pipe sizes and BSP pipe sizes are close enough to cause confusion, but they are not interchangeable.

Female-to-male and male-to-male configurations are available for threaded reducers. If you're joining dissimilar materials or standards, contact our team and we can advise on the right fitting.

Frequently Asked Questions

What is a pipe reducer used for?

A pipe reducer connects two pipes of different diameters — for example, stepping from a 22mm supply down to a 15mm branch. They are common in plumbing systems where a main run feeds into a smaller distribution leg.

Are the reducers compression or threaded?

Both types are available. Compression reducers grip the pipe mechanically when the nut is tightened; threaded reducers connect to other threaded fittings via BSP or metric threads. Check the product listing for the connection type on each end.

What does BSPP mean?

BSPP is British Standard Parallel Pipe — a thread standard used extensively in UK and European plumbing and pneumatic fittings. Unlike BSPT (tapered pipe thread), BSPP threads are parallel and rely on a seal face or O ring rather than thread interference to seal.

Do you stock reducing couplers in metric sizes?

Yes. Metric-to-BSP and metric-to-metric reducing couplers are available. Check the individual product listings for available sizes.

Do you deliver plumbing reducers near me?

We deliver to England and Wales with free delivery on orders over £200.