Flushing trough

A flushing trough is a long cistern which serves several WC pans. It is designed to allow more frequent flushing.

Common uses

Flushing troughs are commonly used in places such as schools, colleges, public toilets, factories and public buildings where quick refill of the flushing cistern is required. Siphonic action is started in the same way as an ordinary flushing cistern and as the water is siphoned, the water level falls only inside a timing box designed to permit the required flush only. Thus, when the timing box has been siphoned of water, air gets in through an air pipe to break the siphonic action. After a short period of time, the timing box refills with water through a hole in its side. The cistern is then ready for flushing again.