strange humming sound from tap

[trevorbayliss]

We have a main bathroom which our little girl uses about once a week. We have a normal basic bath with a shower overhead (normal shower valve running off combo system).

Just now a humming vibration sound was coming from the taps it turns out. I thought it was the fan overhead, but when i turned that off the humming continued.

I then opened the cold tap and the noise stopped.

Any idea what this is ? I have never had this before. I wonder if it is to do with air escaping from the tap area ?

Thought appreciated. The noise came back 3 minutes later, but then went away again. Nothing happened since.

 

[oilboffin]

Bit of water hammer if the hot tap had been run it's prob the cwsc in the loft filling and the washer or diaphragm vibrating with a bit of muck under it.Bob

 

[trevorbayliss]

We don't have a filler tank as on a combi boiler system.

Still maybe a bit of much under the washer then ?