REF #2944
Non-Return
Non-return valves — also known as one-way valves, reflux valves or foot valves — allow flow in one direction only, closing automatically when flow stops or attempts to reverse. They require no manual operation and no external power, making them a reliable passive component for backflow prevention across a wide range of systems. Applications include pump discharge lines, industrial process pipework, compressed air circuits and domestic appliances such as dishwashers and washing machines. The Hosemaster stocks non-return valves in both female-to-female and male-to-female BSP connections, across a range of standard diameters in brass construction.-
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REF #2943
Female x Female Non Return Valve
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£12.76 INC VAT
£10.63 EXC VAT
Non-return valves: passive backflow prevention
A non-return valve is a simple device that solves a straightforward problem — it stops flow going the wrong way. There's no actuator, no power supply and no manual operation involved. When flow is in the correct direction, the valve opens. When it stops or reverses, the valve closes. That's it.
The value of that simplicity is reliability. Non-return valves don't need maintenance cycles or operator attention. They sit in the pipework and do their job continuously. Where they matter most is in pump systems — without a non-return valve on the discharge side, a pump can lose prime when it stops, or backflow can spin the impeller in reverse and cause damage. In compressed air systems, a non-return valve prevents air from a downstream receiver from flowing back into a compressor or secondary circuit.
The range here covers BSP connections in female-to-female and male-to-female configurations across standard diameters. Brass construction suits most water, air and general industrial duties. If you need a non-return valve for a specific medium or elevated temperature application, check the product specification or contact the team.
Frequently Asked Questions
What is a non-return valve?
A non-return valve (also called a one-way valve or check valve) allows fluid or gas to flow in one direction and automatically closes to prevent flow in the opposite direction. It requires no manual operation — it responds to changes in flow direction and pressure.
Where are non-return valves used?
Common applications include pump discharge lines (to prevent backflow when the pump stops), compressed air circuits, heating systems, domestic appliances such as dishwashers and washing machines, and industrial process pipework where backflow would contaminate or damage the system.
What connection types do your non-return valves come in?
We stock female-to-female and male-to-female BSP (British Standard Pipe) connections across a range of standard diameters. Check the product listings for the specific sizes available.
What is the difference between a non-return valve and a check valve?
They are the same thing. 'Non-return valve' and 'check valve' are both widely used terms for valves that allow one-directional flow. Other names include one-way valve, reflux valve and foot valve. The terminology varies by industry and application.