Unless hard water in your heating system is treated, scale builds up in the heat exchangers pipework and immersion heater elements. Only 1.5 mm of scale build up will increase your energy consumption by 12% per year.

This 10in Clear Unit uses polyphosphate in a dilute form and acts as a sequester preventing precipitation of calcium scale as well as offering a level of protection against corrosion.

The polyphosphates forms bonds with the scale causing minerals, which make them more water soluble. The hard minerals remain in the solution as opposed to depositing scale on heat exchangers. This means that the treatment is permanent so storage of water in tanks and thermo stores remains protected at all times

These kits are easily installed just in front of the boiler on the cold water inlet feed or at the mains for whole house protection. 15 mm or 22 mm versions available. This unit has significantly lower running costs as the internal dispenser is refillable allowing you to buy Polyphosphate refills that contain more dosing capacity than disposable refill cartridges.

It is advised that you should have a separate tap of untreated water before the polyphosphate dosing system for your drinking water.