How to pressurise expansion vessel?

Many thanks for the information To both Dave M and a ''heating engineer''
Could Dave M please clarify first words ''Locate Sharadar Valve'' I am not familiar with the term Sharadar Valve Many thanks Donald Finlayson

Donald Finlayson
December 2009

locate sharadar valve [air side] usinng a car tyre foot pump preferabley with system no pressur on it [test for no water in air side apply a small screw driver into same mutch lick letting a car tyre down.pump up vessel to 1 bar or 14.2 lb/ sq ins. once re pressurised top up system and vent rads.

dave m
December 2009

all you need is a tyre press gauge & a bicycle pump, when press is zero pump vessel to 1/2bar(7-8 psi) then pressurise system from cold feed to 1bar. job done. but if you have water coming out of the air valve when you depress it, your expansion vessel is kaput & needs to be replaced. you MUST also put some more corrosion inhibitor in the system. No dont ask me, its too complicated for the layman.

a heating engineer
December 2009