MULTI PURPOSE ONE WAY VALVE FOR WATER AND WASTE PIPES

Multi hose size for 13 20 and 26mm pipes SPECIALIST VALVE FOR SMALLER BORE PIPES

Flap valves need only low pressure to open, your mouth will blow them open easily. They need reasonable back pressure to seal and may still allow a trickle past, more so if used for waste and a bit gunged up.

170mm long with central flange flap valve.