Oso unvented. Cold water through tundish

[armyash]

Had a customer ask me to look at her unvented cylinder.

Cold water running through tundish. Isolate supply to cylinder and the water stops running, needs new combi valve.

She did have insurance who refused to touch it because it hadn't been serviced for 2 years.

I've advised to change t and p valve and expansion valve also so all the components are new and saves something else going in the near future. Would you say that is good advice? The parts are not cheap, would be direct from manufacturer.

Labour wise I'm thinking 2 hours and will do a service certificate as I go so should she need insurance again she is covered.

 

[markfxy]

I had one recently the prv was running intermitently turns out it was the basin mixer tap the mains pressure was lifting the ceramic disc and pressurising the cylinder I put an nrv on the hot feed to the tap and problem solved.
Took me a while to sus it out though

 

[armyash]

Job done. It was the combi valve. Gave the customer the option to change the t and p also or not she said change it anyway.

Back Wednesday evening to service the boiler too.
Icos