Side-Entry vs Bottom-Entry Fill Valves: Which One Does Your Cistern Need?
How to tell a side-entry fill valve from a bottom-entry one, and what to check on a UK or European cistern before you buy a replacement.
Cistern parts
How a toilet tank fills, holds, and flushes.
Guides to the fill valve, the flush valve, and the repair kit inside a toilet cistern. The pages explain the parts. They are not a catalog, a certificate list, or a shop.
Specifications and certifications are confirmed on request.
Latest guides
Repair notes for fill valves, flush valves, water level, and kits.
How to Adjust the Water Level in a Toilet Tank (Float Ball, Float Cup and Side-Entry)
Water running into the overflow or a weak flush? Learn how to adjust the float on ball-arm, float-cup and side-entry fill valves, step by step.
European vs American Toilet Tank Parts: What's Different and Why It Matters
Push buttons vs levers, canister valves vs flappers, BSP vs ballcock threads: the key differences between European and American toilet tank parts.
How to Replace a Toilet Fill Valve (Bottom-Entry and Side-Entry)
Step-by-step guide to replacing a toilet or cistern fill valve: choosing the right type, removing the old valve, fitting the new one and setting the level.
How to Replace a Toilet Flush Valve: Flapper and Dual Flush Types
When to replace just the flapper or seal, and when to replace the whole flush valve. Step-by-step for lever toilets and push-button dual flush cisterns.
Toilet Keeps Running? How to Find the Cause and Fix It
Diagnose a running toilet or cistern in minutes: fill valve, flapper, dual flush seal or water level. Step-by-step fixes and safety tips.
Toilet Tank Repair Kit: How to Choose the Right One
What's in a toilet tank repair kit, which type fits your toilet, and how to check sizes, threads and flush type before you buy.
For distributors in Europe and Latin America
Wholesale terms for distributors in Europe and Latin America are on the distributor page. Territory and Incoterms are confirmed when you inquire.