WC Flush Valves

Find replacement WC flush valves for repairing or upgrading toilet cisterns. The flush valve is the outlet mechanism that releases stored water into the toilet pan when the button, lever or cable is operated. A worn seal, damaged mechanism or incorrect adjustment can cause constant water loss into the pan, unreliable flushing, a sticking button or an incomplete flush.

Our range includes single-flush and dual-flush valves, telescopic and cut-to-height mechanisms, cable-operated valves and models with adjustable flush volumes. Before ordering, compare the existing valve’s outlet size, overall height, overflow arrangement and operating method. Check whether the flush button operates directly from above, off-centre or through a cable, and confirm that the replacement will fit the cistern opening and available internal space.

Adjustable dual-flush mechanisms can help reduce water use by allowing a smaller flush for liquid waste and a full flush when required. Selected products also include useful installation features such as adjustable dead-water level, off-centre button adjustment, supplied sealing washers and WRAS or NF approval where specifically stated on the product page.

Compatibility varies between ceramic and plastic cisterns, so dimensions and connections should always be checked rather than relying on appearance alone. If the cistern continually refills, inspect both the flush-valve seal and the filling valve because either component may be responsible. GetPlumb stocks dependable WC cistern repair parts for plumbers, maintenance teams and household repairs. If you are unsure which flush valve is required, send us clear photographs of the existing mechanism, flush button and any visible manufacturer or model markings.