15 to 22mm ?
Posted: Wed Oct 27, 2010 4:47 pm
Hi I have a 15mm mains cold water supply going directly to a hot water heater in the kitchen, electric shower, and of course toilet and 2 sinks in total. I am re routing the pipework (new kitchen) so would there be any reason at all for stepping up to 22mm along the run and if so why.