A 15mm lever operated isolating valve for quickly shutting off water supply to individual appliances or fittings. WRAS approved for use in UK drinking water systems. Quarter-turn lever operation makes isolation fast and straightforward.
A lever operated isolating valve is one of those fittings you barely think about until you need it — and when you do need it, you really need it. This 15mm version gives you a simple quarter-turn shut-off on any 15mm supply line, letting you isolate a tap, toilet cistern, washing machine, or dishwasher without touching the main stopcock. Plumbers fit these as standard under sinks, behind WCs, and on appliance feeds as a matter of course. There is no good reason not to.
The lever handle makes the valve status immediately obvious — parallel to the pipe means open, perpendicular means closed. No guessing, no hunting for a screwdriver slot, no explaining to a homeowner how to turn the water off in an emergency. That clarity alone makes lever types preferable to slotted quarter-turn valves in most domestic and light commercial installations.
Where Lever Operated Isolating Valves Are Used
Fit these anywhere a local isolation point would save time or prevent a call-out. Under-sink connections are the most common application — one valve per supply line keeps things neat and serviceable. Behind a toilet cistern, inline on a washing machine hot or cold feed, before a water softener, or ahead of a boiler fill loop. Anywhere you want to shut off water to one fitting without disturbing the rest of the system.
The WRAS approval means this valve has been assessed and listed as suitable for contact with drinking water in the UK. That matters when you are working on potable water systems — using fittings that are not WRAS approved on mains supply pipework is not compliant with Water Regulations, and it is the kind of thing that comes up during inspections. Fitting approved components from the start saves any awkward conversations later.
At 15mm, this valve fits standard 15mm copper, chrome, and compatible push-fit systems. Compression ends are the typical connection type for isolating valves of this size, making installation clean and straightforward with standard tools.
Pro Tip: Always fit isolating valves at the time of installation rather than as an afterthought — retrofitting under a kitchen unit with the water live is nobody's favourite job.
Lever operated isolating valves at 15mm are a standard fit on domestic and light commercial plumbing installations across the UK. They are used on cold and hot water supplies to kitchen taps, bathroom basin taps, toilet cisterns, washing machines, dishwashers, water softeners, and boiler fill loops. Any individual fitting or appliance that benefits from a local shut-off point is a candidate. Plumbers also use them on commercial premises where multiple fixtures share a common supply and individual isolation is needed for maintenance without interrupting the whole building.
Best For
Under-sink tap supplies
Toilet cistern feed lines
Washing machine and dishwasher connections
Boiler fill loops
Water softener inlet feeds
Light commercial plumbing installations
Compatible With
15mm copper pipe
15mm chrome pipe
Compatible 15mm push-fit systems
Compression fittings standard
Key Features
WRAS approved for UK drinking water systems
Quarter-turn lever operation
Open/closed position clearly visible at a glance
15mm connection size
Suitable for hot and cold water supply
Not suitable for: Not suitable for gas pipework or central heating systems without confirming the correct pressure and temperature ratings. Not intended for pipework above 15mm nominal bore.
Isolating valves are typically installed in compression fittings. Cut the pipe cleanly and squarely, slide on the compression nut and olive, and tighten to the valve body — do not overtighten, as this can distort the olive and cause a weep. Make sure the valve is in the open position before turning the supply back on to test for leaks.
Once fitted, a quick turn of the lever confirms the valve operates freely. It is worth cycling it once or twice on a new installation just to seat everything properly. Label the valve if it is hidden inside a cabinet or behind an access panel — saves the next person ten minutes of guesswork.
Turn off the main water supply before starting work on the pipework
Mark and cut the pipe at the chosen isolation point, ensuring a clean square cut
Slide the compression nut and olive onto the pipe before offering up the valve
Set the valve to the open position and hand-tighten the compression nuts onto both ends
Use a spanner to tighten the nuts a further one to one-and-a-quarter turns — do not overtighten
Restore the water supply and check both compression joints carefully for leaks
Cycle the lever to closed and confirm flow stops, then return to open for normal use
What does WRAS approved mean on an isolating valve?
WRAS stands for Water Regulations Advisory Scheme. A WRAS approved fitting has been independently tested and confirmed as suitable for use in contact with drinking water in the UK. Using WRAS approved components on mains supply pipework keeps you compliant with Water Regulations — important for any domestic or commercial installation.
Can this valve be used on both hot and cold water supplies?
Yes. Lever operated isolating valves of this type are generally suitable for both hot and cold supply lines at normal domestic pressures and temperatures. They are commonly fitted on both feeds to kitchen and bathroom taps.
Is this valve suitable for push-fit pipe as well as copper?
The valve itself uses compression ends, which are designed for copper and chrome pipe. Some push-fit systems can be adapted to compression connections using the appropriate fittings, but you would need to check compatibility with your specific push-fit system before proceeding.
This 15mm lever operated isolating valve is manufactured for use on UK mains pressure potable water systems and carries WRAS approval confirming its suitability for drinking water contact. Compression end connections are standard for this valve size. The quarter-turn lever mechanism provides fast, positive shut-off with a clear visual indicator of valve position at all times.
Connection Size
15mm
Operation
Quarter-turn lever
Approval
WRAS approved
Connection Type
Compression
Application
Potable water, hot and cold supply
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