Hi
When I have my multi burner stove on at a high temperature the water gets hot and circulates upstairs via a gravity feed (Pipe 1 in the attached image, this pipe gets really hot, this is fine. I turn the pump on (P) in my image attached, and the water is circulated through my house, this is still fine.
However when I turn the pump off when the stove is still hot, pipe 1 becomes stone cold and pipe 3 (feed from upstairs return im assuming) gets very hot as if the water is falling back down and reversing the original pump flow. After a while the pipes start banking as if boiling water is in the back boiler and is forced up pipe 1 (I know it does as ive had my hand on it when it was stone cold, then bang, boiling water went up and burned my hand!)
I do not understand why when the pump is turned off the water flow suddenly gets reversed. And even against the natural hot water goes up convection. Makes me wonder if my pipes are all wrong.
The fire and pipes were fitted before I moved in. I also have other queries, which ill post seperately.
In the image attached im assuming pipes
1: goes upstairs to the radiators and coils through the hot water tank to provide some heat there, then returns in pipe 3
Pipe 2 must be the downstairs feed
Thank You for any help you can provide
When I have my multi burner stove on at a high temperature the water gets hot and circulates upstairs via a gravity feed (Pipe 1 in the attached image, this pipe gets really hot, this is fine. I turn the pump on (P) in my image attached, and the water is circulated through my house, this is still fine.
However when I turn the pump off when the stove is still hot, pipe 1 becomes stone cold and pipe 3 (feed from upstairs return im assuming) gets very hot as if the water is falling back down and reversing the original pump flow. After a while the pipes start banking as if boiling water is in the back boiler and is forced up pipe 1 (I know it does as ive had my hand on it when it was stone cold, then bang, boiling water went up and burned my hand!)
I do not understand why when the pump is turned off the water flow suddenly gets reversed. And even against the natural hot water goes up convection. Makes me wonder if my pipes are all wrong.
The fire and pipes were fitted before I moved in. I also have other queries, which ill post seperately.
In the image attached im assuming pipes
1: goes upstairs to the radiators and coils through the hot water tank to provide some heat there, then returns in pipe 3
Pipe 2 must be the downstairs feed
Thank You for any help you can provide