4mm Airline Non Return Valve

4 mm Airline Non Return Valve

These valves prevent water back siphoning to the air pump and potentially damaging it.

If there’s a power failure, or if you switch the air pump off water will travel back down the airline.

If you cannot site your air pump higher than the water level then these are recommended.

Simple to fit, push on connection into the airline.

Make sure it’s fitted correctly, the non return valve has a direction indicator on the side.

Power failures do happen.