Air in hot water tap after no use for a few days.

[wedge69]

Hi.

We have a sealed heating system with an invented hot water cylinder. If we go away for a few days, when we come back and turn the hot water tap on on the bath we get water flow then a stutter of air. It clears up after a few seconds and the water then flows OK. Just wondering what causes this?

Cheees

 

[buck51]

Do you turn the mains water off when you go away

 

[wedge69]

Yes. Safest thing to do, right?

 

[buck51]

The answer is simle then, you have a leak, maybe 2 leaks water getting out and air getting in,

could be as simple as dripping taps,

 

[CombustionGuy]

When you turn the water off do you drain the tank by leaving taps open?

If so it's air in the tank because of that. Nothing to worry about

 

[wedge69]

Massively delayed reply.

Turns out the utility room tap was leaking in a non obvious spot. Isolated that before going away and no issue upon return. Now just need to replace the tap.