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Ahh right OK thanks, I thought it was right, but you know what it's like when a bit of doubt creeps in :) Thanks

Hi, possibly a daft question this but here goes! I noticed that the pressure on my boiler was right down at the bottom of the green, so decided to put it up a bit. I took the little plastic key, put it in the hole, pushed it up and then turned it. I then turned the little plastic square...