Recent content by Desktopmonkey

There is a valve on the vent/expansion pipe [there seems to be valves everywhere!], which I have PARTIALLY closed to minimise the intake of air.

Thanks for the response. The vent pipe sucked up a pint of water in less than 10 secs. Closing the valve on the vent pipe stops the rushing sound, but I'm not convinced that this is a good permenant solution!?. I used X100 inhibitor by the way.

My system is an open one, gas fired, 7 rads, grunfos super 4 pump and a worcester cbi boiler. expansion tank in loft. The system is I think, 20 years old, but we replaced the boiler 4 years ago. THE PROBLEM started about 4 months ago and is that the pump is very noisy when running, and the...

The pump is a Grundfos Super 4

The boiler is a model ref 9/14CBi

Hello!. First time here and looking for help. I have a Worcester gas fired boiler (4 yrs old) located downstairs, 7 rads, unsure of pump type. At initial startup, I get a rushing noise from the pump and de aerator which ceases after about 5 mins. 2 upstairs rads need daily bleeding, air has a...