Okay I'm here...we live in a hard water area and have installed a Culligan Water Genie, this is connected to the inlet flow into house under the kitchen sink. We have also has a separate filter system for the drinking water.
The water genie is brilliant and I must admit to leaving on when I wash the car as it makes a world of difference as it deson't streak and also the water marks instead of marking the car can now be removed easily.
They cost about a £1k all in with fitting etc but shop around as some companies will do you a good deal on them, the only thing you need to factor in is the salt about 1 bag every couple of months and an annual service plus the new filter for the drinking water system.
http://www.wrekinwatersofteners.co.uk/wrekinwatersofteners/final.asp?id=95This is a link to the company that supplied, fitted and look after ours....very helpful, ask for Graham if you call for any advice...tell Sonia and Wayne gave you the details...
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Sorry for not much detail as I'm on a neighbours PC due to mine dying.....
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