I have got a Potterton Puma 80. I saw the gauge in the red (low) and topped up. The hand on the gauge jumped to the (high) red straight passed the green section. How can I lower the water in the system? Do I just drain a radiator? What happens if I leave the boiler on with the level this high?

Zamir, January 2007

just drain a radiator bleed valve to pressure comes down.

hi-spec plumbing, January 2007