This new release from BWT replaces the MC450 Water Softener. Comes complete with a Full Installation kit - Everything you need to install the unit no matter what system you have! Installation kit includes components you need to install on: - Conventional vented system - Combi Boiler - Unvented System - Pressurised System - Megaflow System ....a saving of up to 60! BWT WS455 Luxury Water Softener - Delivering Irresistibly soft silky luxury water Now Includes Free Commissioning What does the Free Commissioning Involve This new free service will see a commissioning engineer taking on the customer service element of the new installation. The engineer's visit can be booked with the BWT commissioning team by either the installer or the customer directly. During the .