flyaway
New Member
I have a serious thermo-siphoning issue - 25 to 30 degree overnight temperature losses from solar hot water tank. Replaced a Watts 1/2 inch check valve which was most logical culprit. Installed a new Kitz 3/4 inch check valve. Still have same problem. When I close off the glycol ball valve, my overnight heat loss is about 3 degrees; that is, no thermo-siphoning.
I do have a Metlund on demand recirculation pump installed above the solar hot water tank. I do not believe this is an issue.
System pump is a Taco. Thinking about adding a Grundfos pump with built in check valve. The entire system is essentially SunEarth components: collector, tank and controller.
Any good thoughts will be greatly appreciated. I'm stumped but determined.
I do have a Metlund on demand recirculation pump installed above the solar hot water tank. I do not believe this is an issue.
System pump is a Taco. Thinking about adding a Grundfos pump with built in check valve. The entire system is essentially SunEarth components: collector, tank and controller.
Any good thoughts will be greatly appreciated. I'm stumped but determined.