Hello,
I have recently noticed that the water from my cold water main sometimes contains a multitude of tiny bubbles. This gives the water a cloudy appearance and if you put your ear to it you can actually hear it fizzing. After roughly ten seconds the bubbles subside and the water then looks and sounds normal This happens with water drawn from the kitchen tap, which has passed through the stopcock and a PRV, but nothing else (i.e. not through a boiler or similar). It doesn't seem to cause any real problems, except for an intermittent crackling noise as the water passes through the tap.
I was once told that air is injected into the supply sometimes in order to keep the pressure up during maintainance work. Is this true, or is there some other reason?
I have recently noticed that the water from my cold water main sometimes contains a multitude of tiny bubbles. This gives the water a cloudy appearance and if you put your ear to it you can actually hear it fizzing. After roughly ten seconds the bubbles subside and the water then looks and sounds normal This happens with water drawn from the kitchen tap, which has passed through the stopcock and a PRV, but nothing else (i.e. not through a boiler or similar). It doesn't seem to cause any real problems, except for an intermittent crackling noise as the water passes through the tap.
I was once told that air is injected into the supply sometimes in order to keep the pressure up during maintainance work. Is this true, or is there some other reason?