Leak in Hot Pressure - Pressure Related

Gavin1

Sorry for the title, I cannot change it.

I opened my hot press this afternoon to find a constant drip off a joint on the pressure relief pipe.

The system is a pressurised system feeding a solar tank. There are some is a pressure reducer on the line from the tank in the attic from what I can see on and a pressure relief also.

The solar panels are active today and when I looked to see what impact they where having to the temp in the tank I noticed the leak.

I was stumped for a while and closed off the feed into the tank. However when there was a draw on the tank the leak stopped.
Would the increased temp in the tank generate enough pressure to open the pressure relief valve?

Also I need a decent plumber on the northside of Dublin (Dublin 13) to sort this out. Any suggestions by PM would be appreciated.

Thanks.

nmacc

Hi Gavin,

It might help if you could post a drawing or perhaps a link to some photos. I've spent many years installing solar panels, but frankly I can't fully understand your description.

Now I know that I'm thick, but I also know that I'm not the only one.

Gavin1

Hi again.

I got a plumber out, eventually.

The issue was that there was an expansion tank on the hot tank (large solar tank) was no longer pressurised and the bladder had ruptured. From what I am told as there no longer was an route for expansion the pressure relief would lift when the tank got hot.

Thanks