i did mine some years ago ( done it twice in 12 years ) .its DIY but quite difficult due to space limitations . make sure you use new fibre washers on all pipework and be aware that new valves are v expensive .... the diaphram in the middle of it ( the bit that breaks / tears ) is about 12 quid !!! and simple enough to replace with a bit of care while you`ve got the thing off . There`s a switch behind the valve held in place with a circlip .
dave s, April 2011
