Flush Valves & Toilet Spares

Learn more about flush valves & toilet spares

A flush valve sits inside the cistern and controls the flow of water into the toilet pan. When you press the button or lever, the valve opens and lets the stored water drain to clear the pan, then seals again so the cistern can refill. It works with the toilet fill valve, which controls the incoming supply and shuts off when the cistern reaches the correct level.

The flush valve and the fill valve do different jobs. The flush valve releases water on demand. The fill valve manages the incoming supply. Knowing which part needs replacing helps you avoid changing more than you need to.

Compatibility and fit

The right flush valve depends on the toilet flush mechanism and the cistern specification, so check the existing setup before you select a part. Measure the valve height, cistern depth, fixing method and overflow arrangement so the new valve seats and seals correctly. Confirm whether the cistern is concealed or close coupled, because those layouts use different access methods and parts. If the make and model are available, use them to narrow the choice and reduce the risk of ordering the wrong flush valve.

Typical uses

• A close coupled toilet flush valve suits cistern on pan toilets where the operating button or lever is mounted on the cistern lid.

• A concealed cistern flush valve suits installations hidden behind a wall or service panel.

• Dual flush valve options allow a full or reduced flush for buildings where you want two flush volumes.

• Single flush valve replacements suit straightforward like for like swaps.

• Bottom entry flush valve and pneumatic flush valve arrangements suit cisterns and button mechanisms that call for them.

• Commercial washrooms and other busy buildings often need the right flush valve type for repeated use across multiple cisterns.

How to choose the right flush valve & toilet spares

• Identify the cistern type first, close coupled, concealed or otherwise, as this dictates the valve style and access method.

• Check the outlet style and overflow arrangement so the new valve matches how the cistern drains.

• Measure the valve height and cistern depth to confirm the part will seat and seal correctly.

• Decide between dual flush and single flush based on the application.

• Match the operation to the existing button or lever, particularly on pneumatic and concealed systems.

• Compare the product specifications with the fitted toilet spares before you order, so you can avoid wastage and repeat visits.

• If you are unsure, use your local branch team to help you narrow the choice before you place the order.

Before you order

• Measure the valve and cistern, and note the fixing method and overflow style before you buy.

• Confirm whether the part is for a concealed or close coupled cistern, as the two are not interchangeable.

• Check compatibility with the toilet spares already fitted, including the fill valve and the flush button or plate.

• Note the make and model of the existing toilet flush system where you can, since matching parts speeds up selection.

• Always isolate the water supply before you start work and follow the fitting instructions for the specific part. 

• Use the product specifications to check suitability for the cistern and the intended application.

Explore our range of flush valves & toilet spares

Our range includes flush valve replacement parts for quick like for like swaps on common cisterns. We also stock concealed cistern flush valve models for wall hung and panelled installations, close coupled toilet flush valve options for standard cistern on pan toilets, and dual flush and single flush choices to suit different water use requirements. 

You can also find related toilet spares, including toilet cistern valve and toilet fill valve parts, so you can complete the toilet flush system in one order. 

Use the product specs to compare the fitting details, then order online or collect from your local branch once you have matched the cistern specification.