Non-Return Valves (One Way)
A non-return valve is used most commonly with household pressure pumps and on garden taps in irrigation systems. On a pump, a swing or spring check is commonly used, ensuring that water, in the suction line, is not sent back through to the water source, leaving the pump unprimed, or on the delivery side back through the pump, reversing the impellers and damaging your pump.
In irrigation, a non-return valve - can also known as a backflow prevention device - comes directly off the tap to ensure that mains or town water remains uncontaminated from bacteria, insects or bio-matter living in your gardens.
