hi yes he can as long as he knows how its done the boiler must be isolated and drained down to zero pressure then a tyre pressure gauge will tell what if any pressure is in it most hold around 0.7bar you can pump it up with a bike pump if any water comes out when the shrieder valve is pressed then its capput and needs replacing and then that can be a different thing because on some boilers the gas valve has to be removed to gain acsess then it will need a corgi engineer
Is working on the expansion vessle not technically working on the boiler tho and the apprpriate FFD and burner pressure checked needing to be done after??
Is working on the expansion vessle not technically working on the boiler tho and the apprpriate FFD and burner pressure checked needing to be done after??
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