The Dropson limescale descaling unit is the perfect solution for homes in areas where the water supply is high in lime deposits or hard. By introducing the Dropson to your domestic water system you will add much greater longevity to your washing machine, dishwasher, shower and main heating system. This system prevents limescale buildup throughout your domestic water system by binding the calcium ions (CA) and the carbonate ions (CO3), crystallising them in a non-scaling structure, leaving them suspended in the water and incapable of binding to your plumbing system and appliances. By removing limescale buildup from your domestic water supply, heating costs can also be greatly reduced as your main heating element is not heating through limescale. The EMI4000 is recommended for any large house with more than 3 bedrooms and 2 bathrooms.