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Dear all, When I flush my toilet lately I get a loud groaning noise within the floor as it fills back up. Is this water hammer? Do I need to replace the diaphram/flapper valve. Any ideas please? Paul

I have a boiler to heat my hot water tank and my heating, it is not a combi boiler though. This morning my water was hardly hot at all, just warm even though the boiler had come on. Any ideas of the first place to look, any simple things before calling plumber? I have yet to try the...