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I now know that you should use two 2 way switches and one intermediate however I have already replaced three old switches with three intermediates. Yes I know i should have done more research before buying the new switches or after I realised they were so different to the old ones! The...

Hi all, I'm not very clued up on boilers and would really appreciate some help with this before I call someone in. My boiler was dripping a small amount of water out the plastic cover on the bottom everytime the HW was switched on. Two days later and the pressure dropped from 0.8 to 0.4...