Whale 1/2 inch Non-return Valve in White

When fitted in line on the suction side of the pump, Whale non-return valves will ensure maintenance of prime, particularly if pump valves are weak. Particularly useful with electric pumps and worth fitting as close to water tank as possible. The latter is recommended where hose clips have to be made very tight. The plastic non-return valve incorporates a specially moulded base to prevent it being sucked flat to the base of a water tank when used in the end of a supply hose.