Just fitted worcester 37cdi boiler. Central heating working great, hot water flow rate not 16litres a minute, only half even though the incoming mains is good. Can anyone help?
Hi, I work on new builds, we use 10mm for radiators which are pulled back to a 22mm run for the central heating. As long as you have a 22mm run it doesn't matter if you have 10 or 15mm to radiators.[/b]