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Starting a new thread as the topic is fairly different from the last one. Tracing the level of our oil tank to the boiler, the bottom outlet on the tank is about 10cm higher than the burner. The oil line drops almost straight down, is buried for about 20m, then comes up and into the house at...

Hi all We have an old Worcester 20/25 oil fired combi. Not sure how old it is but I'd guess about 23/24 years. It started losing pressure, gradually getting worse over a few months, now it won't hold even for an hour or 2. A local plumber came and took it apart, and said that the water...