We purchased a Grander W100 Water Treatment System from Douglas Gordon in May 2005. Prior to that date we had continuous major problems with our household hot and cold water systems caused by extremely hard water in our area. We had had to replace the hot water cylinder owing to the fact that it was totally clogged up with lime scale, and we were continually having to de-scale kettles, etc.
Since we installed the system we have had no problem with our hot water system, and any deposit that forms on the kettle is of a soft nature that can be removed very easily with a wash-up brush. We are very happy with our purchase.