I'm changing my bathroom round and want to put the bath where the sink was. The hot water supply to the sink is a 15mm spur from the 22mm supply that enters the bathroom. Do I need to replace all the 15mm pipework to where the bath will be with 22mm, or is it only necessary to add a small section of 22mm to connect to the bath tap?
Don't use flexi hoses -they're rubbish, have seen/known of many splitting. This happened in my house, I installed the upstairs bathroom, 2 years later the flexi hose split - luckily we had just went to bed after using this bathroom and I heard the water running - if we'd been asleep the ceilings downstairs would have come down and who knows what other damage would have been caused.