Hi, I've a new home and had trouble with a resonating noise from the pump (as it's installed on a studded wall in the airing cupboard) My problem isn't necessarily about the vibrations but more your opinions on one of the suggested solutions, having already tried several other attempts to reduce the vibrations. The builders have had a meeting about this and the decision is to try turning the pump around and thus reversing the flow. The system uses an unvented cylinder (Tribune HE) with an expansion tank and the boiler is a Glow Worm Ultracom 18hxi. I'm just concerned that the system is designed to flow one way with regard to the flow of water through the cylinder, the temperature the pump may get if it's receiving the water from the boiler rater than feeding it the cooler water. Also does it matter to any temperature sensors in the boiler ? Would really appreciate any advice and if the proposed solution is something worth a try - is it a known way to reduce vibrations ? Thanks !