Salt free approach to reducing limescale in your home ! Used but clean & working Monarch Scaleout for 4-bed home (22mm pipework), includes new flexihoses X2 and isolation valves X2 plus non-return valve & tool for replacing filter. Add to the rising main to reduce scale formation in your pipework, hot water tank, boiler etc. Needs replacement resin every 3-5 years and new filter annually - new filter just fitted. New cost nearly £600.