Compatibility and purpose This rubber diaphragm washer is designed to work with all For Siamp ball valves and both bottom and side inlet filling valves, providing a reliable replacement for common toilet cistern leaks. Precise dimensions 28*12.3mm dimensions; engineered to exact specifications with 28 mm overall diameter and 15 mm depth, ensuring a watertight seal that stops leaks effectively in the toilet cistern system. Durable rubber construction Made from flexible yet sturdy rubber material, this diaphragm washer maintains its shape and sealing properties through repeated use, offering reliable performance over time. Easy identification and installation Features easily recognizable design characteristics that simplify the replacement process for DIY enthusiasts and professional plumbers alike. Use scenarios Home : Replacing a worn diaphragm in a For Siamp fill valve to stop a running toilet and reduce water waste. DIY maintenance: Quick, straightforward swap during routine cistern servicing or bathroom renovation. Commercial settings: Costeffective replacement in office or hotel restrooms with For Siamp valves to minimize downtime and maintenance calls.