could anyone please recommend a heating engineer to replace diaphragms in the diverter valve and the flow switch, as looking back on this forum seems to be the problem. In the TYNE & WEAR area specifically shiney Row. There is also a small leak somewhere in the system for which we need to top the pressure every 2 weeks, so the leak is not that bad. How would he find the leak incidentally? Would the simple solution be a leak sealer?
