Leak coming from near HWC

[necronaut]

Hey just put the heating on for the first time this season. I have a small dripping coming from a couple of these gold things I have in my airing cupboard next to my HWC. The drip is coming from the little black plastic screw on these gold things. They were loose but now i've tightened them and still dripping slightly.

Can anyone tell me what they are and if this is normal?

 

[Phill Peck]

They are to automatically let air out of your system

If water is coming out they have failed and need replacing

It is worth noting though that the failure of these is usually caused by dirty system water

 

[45yearsagasman]

They are auto air release valves. They should not drip and the cap should normally be loose. Yours need changing.

 

[necronaut]

Very strange that they should both fail simultaneously

 

[adamsheating]

Very strange that they should both fail simultaneously

The likelihood is that they are The same product fitted at the same time to the same system, so the chances are they are experiencing the same fault. Not a massively odd coincidence. Every one of these I've seen recently has been leaking. Simple to swap, but get an RGI if you're not confident. Might need a draindown unless there are gate valves, or it could be bunged.