Air sepatator

[eyespy999]

Hi I have drained and topped up my heating system after a repair. I have an air separator in my boiler with a red cap like a tyre dust cap. Does this need to be left loose or tight? No water cones out of it.

Thanks

 

[Fluffster]

I think you maybe confusing this with the expansion vessel or even an automatic air vent usually located on top of the pump as these both have dust style caps. Post a pic to confirm.

Pete

 

[Agile]

Some later Biasi models had a red "cap" but this was NOT a screw on tyre type but a click up/click down.

Yet another example of why if the OP told us what boiler model he has it would have saved all of us time and trouble.

Tony

 

[45yearsagasman]

999, if you are referring to an auto air vent, then leave the dust cap loose.
Tightening it will prevent it working correctly.

 

[eyespy999]

Thanks Pete that is really helpful thank you.