B
bikerbas
Try the link provided its a lot easy to work out.
45m seems a lot of pipework and elbows
http://www.ukcopperboard.co.uk/lite...ion-Tips/Domestic-gas-planning-and-sizing.pdf
45m seems a lot of pipework and elbows
http://www.ukcopperboard.co.uk/lite...ion-Tips/Domestic-gas-planning-and-sizing.pdf