Bleeding Oil Boiler Line

mjr101 · 2026-01-07T19:51:12+0000

Hi Folks, I need to run a new oil flexi-hose into my Firebird oil boiler and will likely need to bleed the supply. I'm just not sure where to bleed air from - any views on whether it's A, B or C in the diagram please? When the unit is fitted back in, A is underneath (next to the line in), B & C are facing out. If I bleed using A or B, can someone also advise on what C is/does please?

Thanks in advance.

Exedon · 2026-01-07T22:13:23+0000

The one you tagged B
A is return port
C is pressure adjustment don't touch without a pressure gauge Connected to B and combustion analysis equipment to make sense of any adjustments.

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Bleeding Oil Boiler Line

mjr101

Exedon

DIYnot Local

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