It's always been on, since we moved in in July. It just seems to have got louder and really vibrates the pipes. What does the pump do? Is it for the heating?
I have an indirect heating and hot water system - I think. There is a Grundfos Mark II Class F pump on it. It seems to be on all the time and is vibrating the pipes.
Should it be on all the time?
How do I stop the noise?
Nathan