Posted on 23/12/2013 12:36pm
our system goes through a 4-storey house from the basement. When it starts up there is a lot of noise - I think from gas/air in the pipes. Sometimes this triggers a hammer effect in the radiator thermostat valves which then make a loud buzzing noise.
There is one air release trap on the top floor. Do we need to fit another or is there a better answer?