Expansion Tank for Central Heating Boiler Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[cacran]

I have just bought an Expansion Tank from Toolstation.
It says that it is pressurised to 1.5 bar. The one in my Bosch System says it is .75 bar.
Should I reset the new tank to .75 or will it be okay to fit the Tank as it came 1.5 bar?

[stoneyboy]

Hi cacran
If your system runs at 0.75 bar then the pressure vessel should also be at this pressure to allow for maximum expansion/contraction.
Regards S