L
lame plumber
Oh for gods sake as someone who has just had a brand new boiler installed and that boiler has gone kaput because of this issue water back fill into boiler I will tell you why plumbers do this because it's easy and quick, then they are off hoping it down t back up too quickly . Oh for a plumber who takes into account this risk and installs correctly to save thier customers boiler but the they just say it's guaranteed call the manufacturer and the manufacturer says it's the plumbers fault arghh arghh you might guess me and my family are pretty upset
with a name like yours surely you could have done it correctly and btw this is a rather old thread