My friends dad had a system boiler installed in replacment of an old floor standing boiler. The unvented cylinder is right next to the boiler. The firm has fitted the system boiler. But ignored the fact the pressure relief is dripping on the cylinder. As the expansion vessel has lost its charge they even tested the expansion vessel and said it had no air in it. However they didn't recharge they just fit the new system boiler and left. Isn't this really bad practice on there front? Thanks.