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I have a friend who's got conventional boiler and there is no hot water. i checked and the water coming into the cylinder is a liitle bit warm but not hot. the pressure of the hw is very low but it was like that even before the hot water packed up. what could be the problem?!

what is a shank adaptor please?

what is a bypass valve,please?

I am not the person who you replied to but i would also be interested please. my email is [email protected]

Why do you have to repeat the process?

sorry for butting in, but i did not understand simon's final reply