A non return valve is used (mostly with pumps) to ensure within a suction or delivery line that water is not returned back through to the water source, leaving the pump unprimed, or back through the pump, reversing the impellers and damaging your pump. 

In irrigation, a non-return valve (also known as a backflow prevention device) comes directly off the tap to ensure that from mains water, there is no water sucked back into the town water line.

Non-Return Valves (One Way)

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Dual Check Valves
From $27.23 $30.25
Backflow Prevention Kit
From $55.92 $109.00
Philmac Non Return Valve
From $28.14 $32.32
Brass Spring Check Valve
From $8.06 $8.95
Brass Swing Check Valve
From $9.70 $10.77
PVC Slip Swing Check
From $39.22 $39.63
Wilkins Double Check Valve
From $227.70 $311.01
Wilkins RPZ
From $425.70 $534.49

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