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I have replaced a whole house pump with a new one as I required a greater pressure to run a second shower. The original pump was 1.1 bar and the new one is 2 bar. The plumbing around the pump has remained pretty much unchanged after the pumps were swapped. The hot water from the pump supplies...

Hi, The problem I have is that sometimes when the central heating is on I get a noise that sounds somewhat like a dive bombing aircraft. By that it seems to start steadily and then increase in loudness. It doesn't seem to happen all the time though. The noise is the the flow and return...