Hi there The pressure on our combi boiler keeps dropping. We re-pressurise in the normal way but it falls again quite quickly. The central heating is not being used at the moment. There are gurgling noises in the boiler when hot water taps are used - and this is when the pressure drops most noticeably - suggesting a connection there! Is this URGENT - it's Bank Holiday tomorrow! Any advice will be appreciated, thanks, as always. Boiler is a Grant Vortex Combi, fitted only 3-4 years ago and serviced annually.