unvented system problem!

[Johnny]

hi all.

i got called to a house today where water is dripping from the tundish

iv checked the TPRV valve and recharged the expansion vessel with no success

iv only recently gained my g3 and i was sure this would of sorted the problem but it has'nt

im confused of what to try next??

All thoughts would be appreciated

thanks
Johnny

 

[AWheating]

first identify where the water is coming from?? this may mean removing pipework to access the prv and tprv valves before they join together.

Also check the pressure reducing valve is working and not letting too much pressure passed.

if the expansion vessel is set correct and the pressure reducing valve is good then its most likely the valve thats passing is faulty.

 

[nysk2008]

have the customers been messing round the valve as sometimes they dont re-seat properly