How often should you have to top up the pressure on the central heating by opening the pressure valve to let in more water? or should you have to do it at all?
the pressure on my system over 15 months has gone from 1.3 to 0.6 - any comments on this. 15 months ago I had sealant put in and before that I would have needed to top up much more regularly.
thanks
the pressure on my system over 15 months has gone from 1.3 to 0.6 - any comments on this. 15 months ago I had sealant put in and before that I would have needed to top up much more regularly.
thanks