Designed and manufactured in the UK, the Hydroflo has been subjected to rigorous and exhaustive testing. It meets the requirements of BS1212 Part 4, passing 200,000 cycle endurance tests and is 100% tested before leaving the factory. As a result, durability and reliability are supplied as standard making the Hydroflo ideal for use in most domestic and commercial WC cisterns. Fixed bottom inlet versions available from (8.1/2") upto (9.1/2") WRAS approved Flow restrictor provided