Hi, I want to try adding Fernox leak sealer to my vented heating system. Would it be ok to use the Fernox F4 superconcentrate sealer via a radiator on a vented system.
Oh and if you say to fix a leak I won't be amused lol
It will not cure your air problem. Air in a system needs further investigation to find the cause.
OK thanks very much for that. I have a divert valve and the cylinder is fed from a it's own tank in the loft. So a guess that is indirect right ?
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