Pressure release valve?

[ninocass]

We are selling our house and due to complete next week, as luck would have it the hot water tank has decided to develop a drip!!

Its a pressurised system and the culprit is this chap:

Untitled

• ninocass
• 7 Feb 2014
• 1

I assume that its a pressure release value however there are no marking on it apart from "PC 10 BAR 10degC 05-09" I cant for the life of me find the same part online anywhere.

Is this something a novice could change, or should i get a pro in? I assume its a case of isolating the water and draining the system which shouldn't be too expensive?

Thanks!

 

[doitall]

Its an auto air vent, a pro should be able to change it without draining down as it has a shutoff valve in the bottom nut, so you leave the bottom bit where it is and change the top part.

 

[ninocass]

ah ha! excellent!

The leak is not forming on the top but rather underneath the brass lip which has the numbers stamped on it, i had a search and apparently the vents gunk up but if the leak is under the lip then i suspect its likely knackerd.

N

 

[doitall]

Looks like Boss brand so BSS or PTS plumbers merchants, yours is probaly 3/8" but may be 1/2"