The heating expansion vessel
A test performed on the old boilers with no room thermostat or control is to stop the unit to cool to note the pressure hot and cold once see if the pressure has dropped (eg 21.75 Psi to 7.25 Psi warm and cold).
Allow to cool for 2 to 3 hours.
How do I know if my expansion vessel is defective?
- The filling is done very quickly.
- I added to the circuit water in daily, weekly.
- My boiler will constantly safe to excess or lack of water.
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