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I have a new boiler which supplies domestic hot water on demand and directly ie no header tank [central heating is separate sealed system] If I need to change a hot tap washer I will need to switch off all water at mains and turn off the boiler. It seems I have 3 choices to improve things and...

thanks for reply... to be clear pipe concerned is only 1/2 to 1 foot below ground protected by cement / bricks and wood over the top (ie even if someone stands there they will be standing on wood and the pipe should feel a thing Back of terrace so no vehicles and unlikely that anyone would...

It is in fact mains fed I tried to avoid giving irrelevant details but for interest now... I was the one who put in the gate valve in an attempt to increase pressure when shower wasnt working because gate valves have bigger internal diameter. I have since realised that of course flow and...

many thanks everyone for your reliable answers will change it for a 'ball valve' thingy

recently my downstairs toilet developed a problem/blockage which fortunately was before our main sewage pipe for everything else Anyway unfortunately I got a clearing rod plus tool stuck in the pipe and had to smash piping from underground in neighbours garden to get it out. I was amazed by...

Just before my electric shower I have a 15mm gate valve (standard type with red circular tap). The reasons this was fitted are not relevant to my question. Anyway recently someone at B&Q worried me (I was going to fit one somewhere else) by telling me they are not suitable for mains pressure...