i removed a radiator to decorate behind it and i read somewhere on here that you need to repressurise/refill the system after doing so. pressure should be 1 bar apparently?
problem is, the pressure gauge on my boiler (worcester bosch highflow 400) has two needles - one red, one black.
what is each needle for? and what pressure should they be showing?
the black one is currently on a quarter, the red one on one and an half
many thanks in advance
problem is, the pressure gauge on my boiler (worcester bosch highflow 400) has two needles - one red, one black.
what is each needle for? and what pressure should they be showing?
the black one is currently on a quarter, the red one on one and an half
many thanks in advance