G
gastastic
I have just fitted a combi 33kw in to a small semi detached home with a cooker and gas fire, piped it up in 22mm from meter as you do and found it struggled to reach the minimum workin pressure at gas valve of 18mbar so i banged in 28mm from meter to a length of about 1.5 metres and it still only just managed it! does anyone actually bother pipe sizing in small homes!!!