air valve

corkgsxr wrote: »

Its the heating you need to drain not the cylinder.

Its probably a auto air vent to vent the coil.

sorry for so little information. Its a pressurised system and its a air valve. My copper cylinder was leaking last year and in got plumber to replace it while I was at work. When I checked it , he had it fitted with valve against stud wall. He said it would do it no harm but it has been in my head since and if I could just move it from where it is now to about 12 inches away via a half inch copper pipe with a bend on it, it would put my mind at ease.

I was also told by a plumber that I could keep this valve closed as its only for air and if it was closed all that would happen is the air would go to rad and it could be got out from there, I recently notices a little water coming out of it and that's when plumber said I could screw down the little screw fully and shut valve

JohnnieK wrote: »

It's called and automatic air vent for a reason. It automatically ex spells any air that might be in the system.

It being up against the wall will do no harm what so ever.
Who ever told you to keep it closed is wrong.

It's passing water now because the little rubber stopper inside that the float acts against is perished for one reason or another.
It would be 10mins for a plumber to replace.

You can close it for now to stop the water while you get it replaced.

and if I wanted to replace it myself, do I just take pressure off system by draining some water from system from a rad and then take old one off and put new one on

JohnnieK wrote: »

Spot on.

thanks for the help. might move it with a piece of half inch copper while I replacing it. One last thing can you tell me how to bend a 12 inch piece of copper for this job into a s shape without the professional bending gear