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Service valves are essential plumbing fittings that isolate an individual appliance, such as a tap, toilet, or washing machine, without shutting off the main water supply to the property. This makes them a simple but crucial part of any installation, maintenance job or replacement, saving time and minimising disruption.
Shop top-quality service valves at BES, all competitively priced. And with next working day delivery available or convenient click-and-collect options, shopping with us is a no-brainer.
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At BES, we stock a wide range of brass service isolation valves in straight, angled, ball-type, and lever-operated designs.
Our core range includes both straight and angled brass service valves in chrome and press-fit designs, including Straight Service Valve 15mm x 1/2" Union, Chrome and Straight Service Valve Chrome 22mm x 3/4" Union.
For installations where space is limited or pipework requires a change in direction, angled valves are the ideal choice. We stock the Chrome Angled Service Isolation Valve 15mm x 1/2", a robust and durable option with a clean finish for exposed pipework.
Compact and straightforward to operate, ball type valves use a quarter-turn mechanism for quick isolation. A popular option is the Flat Faced Straight Isolation Valve 15mm x 3/8" BSP PM.
Where quick shut-off is required, a lever handle provides fast and reliable operation. Our selection of lever operated isolating valves includes the Flat Faced Straight Lever Operated Isolation Valve 15mm x 1/2" BSP PM, ideal for commercial and residential settings.
A neat and tamper-resistant option, screwdriver-operated valves are frequently used in public or high-traffic areas. BES supplies:
Flat Faced Straight Isolation Valve 15mm x 1/2" BSP PM
Flat Faced Angled Isolation Valve 15mm x 1/2" BSP PM
Flat Faced Angled Isolation Valve 15mm x 3/8" BSP PM
For secure sealing and leak prevention, BES supplies packs of red fibre washers in both ½" and ¾" sizes (packs of 10). These are essential spares for maintenance and fitting.
Service valves are typically installed before appliances such as wash basins, taps, toilets, washing machines, dishwashers, water heaters and boilers. By isolating the appliance locally, plumbers and householders can carry out repairs or replacements without affecting the rest of the system.
Installing a service valve is straightforward and can usually be done with basic plumbing tools. Simply cut the pipe at the required point, fit the valve into position, and secure it using the compression nuts or press-fit connection. Once in place, tighten the fittings and check for leaks before turning the water supply back on.
Service valves are available in a range of sizes to match different pipework and appliances. The most common options are 15mm for standard domestic pipework and 22mm for larger supply lines. Threaded ends are typically ½” BSP for taps and appliances or ¾” BSP for washing machines and similar connections. Always match the valve size to your existing pipework to ensure a secure and leak-free fit.
Have a question or need help? Call our friendly team on 0800 801090 and we’ll be happy to assist.
For over 50 years, BES has been trusted by plumbers, installers, and trade professionals in the UK with quality brassware and plumbing fittings. When you order with us, you get:
A wide stock range of trade-quality brassware service valves for all applications
Fast delivery – next working day on most items
Competitive pricing with bulk pack options available
Reliable customer service and straightforward returns (30 days for refunds and replacements)
Whether you’re fitting a new bathroom, replacing a washing machine, or carrying out commercial maintenance, BES has the service valves and accessories you need to get the job done right. Order online with confidence.
What is a service valve?
A service valve is a small isolation valve fitted to pipework, allowing the water supply to an individual appliance to be shut off.
What’s the difference between straight and angled service valves?
Straight valves are used when the pipework runs in a direct line, while angled valves are ideal when the pipe needs to change direction into the appliance.
How do you operate a service valve?
Depending on the type, operation can be via a screwdriver slot, lever handle, or ball valve mechanism. Lever and ball types are quick to use, while screwdriver types are tamper-resistant.
Are service valves required by regulations?
While not always mandatory, service valves are recommended best practice in UK plumbing to allow quick isolation of individual appliances.
Do I need fibre washers with service valves?
Yes, fibre washers are often required to ensure a watertight seal during installation or maintenance.