I've got a two up two down end of terrance. 2 rads upstairs 2 downstairs. Boiler is in the kitchen, pump is in the cupboard on the landing. I think it's called an open system. When the heating comes on I can hear water running in the loft - there is hot water coming out of the copper pipe that is bent over the F and E tank. All the rads get hot and none have air in. When the heating switches off it sounds like the system is refilling and bubbles are going back up the pipes from the boiler in the kitchen.
18 months ago I had a new pump fitted, 2 years before that I had a pump fitted, three way valve (1 in 2 exits) and the system flushed by a national cowboy company who not only got water every where but put the pump on at an angle so it made a hell of noise (that resulted in an insurance claim). The plumber I use last time was excellent, he fitted the pump the right way up so it is almost silent and made no mess what so ever.
What would cause the water to go up the copper pipe into the F and E tank? The pump is on the middle setting. The thermostat on the boiler is set at 4, 6 is the highest.
I'm not sure if it did this before as I've only notice did it this winter. Any help would be appreciated.
18 months ago I had a new pump fitted, 2 years before that I had a pump fitted, three way valve (1 in 2 exits) and the system flushed by a national cowboy company who not only got water every where but put the pump on at an angle so it made a hell of noise (that resulted in an insurance claim). The plumber I use last time was excellent, he fitted the pump the right way up so it is almost silent and made no mess what so ever.
What would cause the water to go up the copper pipe into the F and E tank? The pump is on the middle setting. The thermostat on the boiler is set at 4, 6 is the highest.
I'm not sure if it did this before as I've only notice did it this winter. Any help would be appreciated.