For Siamp rubber diaphragm washer — direct replacement for leaking cistern fill valves Key benefits Stops common cistern leaks: restores a reliable watertight seal to stop continuous running or slow leaks without replacing the entire fill valve. Compatible repair solution: fits For Siamp ball valves and both bottom and side inlet filling valves so you can use one part for multiple valve types. Durable performance: flexible yet sturdy rubber maintains shape and sealing properties through repeated use for dependable operation. Quick to identify and install: simple shape and standard fit make it easy for DIYers and professional plumbers to replace the worn diaphragm quickly. What it does Seals the inlet in the fill valve to prevent water bypass and maintain correct cistern fill level. Replaces worn or damaged diaphragms that cause intermittent filling, constant running, or noisy valves. Compatibility and specifications Brand compatibility: For Siamp ball valves and For Siamp bottom and side inlet filling valves. Size details: 28*12.3mm (manufactured to specification); measured overall diameter 28 mm and depth 15 mm. Material: long-lasting rubber diaphragm washer designed for repeated compression and reliable sealing. Practical use scenarios Home repair: Replace a worn diaphragm in a household toilet cistern to stop a leak and avoid replacing the whole valve. Property maintenance: Quick, low-cost part for landlords or facility managers to restore multiple bathrooms in apartments or offices. Plumber service kit: Keep as a standard spare part for on-site repairs to save time during routine maintenance calls. Installation notes Inspect old diaphragm for wear before replacement. Clean mating surfaces to ensure a good seal. Simple replacement procedure suited to basic plumbing skills; use with the corresponding For Siamp valve type as specified. Buy this For Siamp rubber diaphragm washer to restore proper cistern function with a compatible, durable, and easy-to-install sealing part.