reducing pressure on air side of external expansion vessel

[tomtimag]

Im fitting an external expansion vessel to my boiler. Have read all the posts and im ready to go , one question. The elbi ex vessel i have purchased is precharged to 1.5 bar. Operating pressure in the manual says no more than 1 bar. How do i decrease the pressure and how do i know what presure is left in it

cheers

 

[Burnerman]

Reduce the pressure by pressing the central pip of the car tyre type schraeder valve on the top of the EV.
Check its pressure with an ordinary tyre pressure gauge.
Pump it back up with a hand or foot pump if you overdo it!
John

 

[tomtimag]

cheers john just examined the new vessel the valve is hidden underneath a black plastic screw on cover. cheers for the fast response now good to go.

many thanks