Hi if feeding baths off un-vented hot water so mains pressure (well 3 bar after the reducing valve on the cylinder). Do baths require 15mm or 22mm supply's. I know from a combi 15mm is ok to a bath, but what about an uvented hot water cylinder?
Bath pipe size for unvented hot water
- Thread starter dextur
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From what I've read you'd be best sticking to 22mm for the flow.
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28mm on my bath 
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28mm on my bath
Worth the extra cost?
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