I bought an Aqualisa electric shower and paid a lot to have it professionally fitted . Almost immediately, when switched on, water began gushing out of the back and down the wall. I looked online and found several postings, including one which explained this was due to a pressure relief valve opening and described how to fix it. Basically, you switch off the electricity, take off the cover, unscrew the valve (difficult) and push a plastic ball back into its tube and then reassemble. OK for a month then it happened again. I phoned Aqualisa customer services and asked for a fitter to repair it under the 2 year guarantee, which they did. Six weeks later same problem. This time customer services said they will make a total of 2 repair visits and thereafter, until the 2 year guarantee has expired, they will post you a new valve which you will have to fit yourself. So what happens after 2 years? You have to buy them and keep changing them yourself or you don't have a shower. It is clearly a design fault, but customer services say it isn't, and "it isn't part of the shower because it's a safety feature", even though it is inside the shower under the cover. What utter nonsense ! I now have a shower that fails every six weeks and the manufacturer won't honour the guarantee. I want my money back but don't know how to get it without spending even more money There are quite a lot of internet postings on Aqualisa electric showers describing exactly the same fault - take a look. Don't buy Aqualisa showers.