I have an old Thorn m series boiler. The label stating the burner gas pressure has long fallen off. Can anyone tell me the correct operating pressure please? I think it is an M54 or maybe M44.
TIA
Bob
I have an old Thorn m series boiler. The label stating the burner gas pressure has long fallen off. Can anyone tell me the correct operating pressure please? I think it is an M54 or maybe M44.
TIA
Bob
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