SAS
Member
Our previous house had a hot water recirculation system with a dedicated return line. This worked great (except that when I moved in I had to change the pump to a stainless steel one because the prior owner used a cast iron pump). Our new house does not have a return line, so I am looking at the option of using a crossover under the sink farthest from the hot water heater. With the recirculation line, I controlled the pump with a thermostatic control that attached to the copper pipe and cut power to the pump when the temperature was about 90-100 degrees. In the current scenario, what confuses me is how the thermostatic crossover works. I've read it shuts down at about 90-100 degrees, but it does not shut down the pump. Can the pump continue to operate if all of the hot water outlets are closed? Does the valve never completely shut?
Also, is any brand better than another? In my old house I installed a Grundfos pump. In 7 years it never gave me any trouble. I noticed that Watts pumps are relatively inexpensive, easily available and made by Grundfos. What about Taco?
Also, is any brand better than another? In my old house I installed a Grundfos pump. In 7 years it never gave me any trouble. I noticed that Watts pumps are relatively inexpensive, easily available and made by Grundfos. What about Taco?