Isolating Valve – 15mm – WRAS Approved

A WRAS isolation valve rated for 15mm pipework is one of those fittings that earns its keep long after it’s been forgotten behind a kitchen unit. Fit it once, and the next time a tap seat fails or a washing machine starts misbehaving, you can isolate the supply in seconds without hunting for the main stopcock. This 15mm WRAS isolation valve meets Water Regulations Advisory Scheme approval, which means it’s tested and certified for use on potable water supplies in the UK. That matters if you’re working on properties that require compliance sign-off, or simply if you want fittings you can stand behind.

Quarter-turn operation is standard on valves like this. One flat-blade screwdriver twist takes it from fully open to fully closed, with the slot indicating direction at a glance. No ambiguity, no partial closures left by accident. The 15mm size makes it the go-to for the majority of domestic supply pipework, fitting neatly inline on copper, and compatible with most compression fittings in standard use.

Where WRAS Isolation Valves Get Used

These valves show up almost everywhere in domestic plumbing. Under sinks and basins, they give you a convenient local isolation point without turning off the whole house. Behind toilets, they’re practically mandatory on any installation worth doing properly. On washing machine and dishwasher feeds, they let the appliance be swapped out without drama. Plumbers often fit them as a matter of course on every appliance connection, and it’s hard to argue with that approach.

WRAS Approval and Why It Matters

WRAS approval isn’t just a badge. It confirms the valve materials won’t contaminate the drinking water passing through them, and that the fitting performs reliably under normal mains pressure conditions. Many local water authorities and building inspectors will expect to see WRAS-approved fittings on potable supplies, particularly on new installations and remedial work requiring sign-off. Fitting a non-approved valve to save a few pence is rarely worth the conversation it starts later.

At under a pound each, these are the kind of fitting you stock up on rather than order per job. Keep a handful in the van and you’ll never be caught short on a straightforward service call.