1in BSP Brass Male to 22mm Copper

This WrekinWater brass adaptor has a 1in BSP male thread at one end and a 22mm copper compression fitting at the other, letting you connect any housing with a 1in BSP female port straight onto 22mm copper pipework. It's a solid, one-piece brass fitting rather than a plastic push-fit, which suits permanent installations plumbed in copper. It suits all housings with 1in BSP female ports, so it works across most standard filter and softener housings using that port size.

When you need this fitting

• You're connecting a housing with a 1in BSP female port onto 22mm copper pipework.
• Your existing brass adaptor has a leaking or corroded compression joint.
• You're converting a push-fit installation to a permanent copper-plumbed connection.
• You need a solid brass fitting rather than a plastic one for a fixed installation.

Mixing thread and pipe standards, BSP thread on one side, metric copper on the other, is exactly what this adaptor exists to solve, and getting both ends genuinely matched is what keeps the joint leak-free: the 1in BSP end needs a proper thread seal, while the 22mm compression end relies on the olive being seated correctly rather than tightened by force. Brass is also better suited than plastic where the fitting will sit permanently under a fixed copper run.

WrekinWater is based in Bettisfield, Shropshire, and has supplied housing fittings like this brass adaptor to UK customers for 15 years, with more than 50,000 customers served and an Excellent rating on Trustpilot. Buying the adaptor as a matched pair of threads from us avoids mixing incompatible parts from different suppliers.

How to fit it

1. Isolate the water supply and relieve any pressure before starting.
2. Wrap PTFE tape around the 1in BSP male thread.
3. Hand-tighten the BSP end into the housing's female port, then a further quarter to half a turn.
4. Slide the compression nut and olive onto the 22mm copper pipe.
5. Insert the pipe into the compression end and tighten the nut until snug, then a little further.
6. Restore the water supply and check both the BSP and compression joints for leaks.