9mm (3/8″) Non-return valves
If you are unable to situate your Air Pump above the pond water level it is essential that a non return valve is fitted, so if the pump is turned off water will not syphon down the airline and enter the pump causing damage.
Non-return value (Brass)
Hose tails sold seperately - please note you will require two hose tails for the non return valve which are sold separately
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