Air separator - is ti really needed?

[jeff the gasman]

Combined vent and feed is fine. Boiler must have a limit stat though. The introduction of combined vent and feeds coincided with the introduction of them.
I find they are less likely to suffer magnetite build up due to expansion and contraction.
Jeff

 

[Richardthe3rd]

Combined vent and feed is fine. Boiler must have a limit stat though. The introduction of combined vent and feeds coincided with the introduction of them.
Jeff

Ah yes, that was when they were introduced if I'm not mistaken.

 

[newbuildinstaller]

If its 22 m or larger then I can envisage it can vent steam as well as letting water run down at the same time.

Not something we often see though!

My local plumber concurs with above statement, must be true if at least two plumbers agree!

Agile aint a plumber hes a GAS ENGINEER!! which means he dont know about cold feed and vents but he can play with boilers