Leak via tundish

muckybutt

Not quite sure on this one so throwing it to the plumbing bods.

We have an albion ultrasteel cylinder (unvented) that does or hot water - the heating side of things via the three P V has been disconnected as we just use the immersion to heat the water so we have pressurised HW.

Anyhow I noticed today water dripping from the discharge pipe outside, upon looking in the cupboard I could see water dripping through the tundish. Two PRV's go into this, one from the hot water side ( 7 bar 90 deg overtemp / pressure ) and one from the incoming cold water supply. I put my finger into the water and it was cold so am assuming its from the cold water PRV and not the hot water side. I put my finger over the end of it and got a slight weep from the bottom of the cold PRV.

On the expansion side of things I also noticed that the tank on the cold water side was cold and appeared to be full of water, am I right in thinking that shouldn't be like that ?

Opinoins please as to fault and fixability for me to do.

southcoastrgi

MI here if you don't have them, servicing should be carried out by a installer with a G3 cert, page 7, on how to check & re-pressure the EV which should be 3 bar

muckybutt

I don't think there's any pressure in the expansion vessel other than that of the water that's in it.