H
holty
has anyone come across one of these.went to a customers today he put a new rad on but the system was airlocked to s@;t,due to a 15mm feed and no vent.three hours later geting airlocks out of the old back facing bleed valves,was wandering who made these monsters of a boiler and if the 15mm which should have at least been 22mm combined feed, was like the servowarms.