I believe the ones at HD are made by Laing. The standard one is an AutoCirc1 with a timer and the AutoCir2 is the newer style where the pump mounts on top of the water heater and the part under the sink is just a non-electric thermostatic valve. The #2 makes it a little easier to get power to the pump. The first time I saw an AutoCirc2 installed I wondered how the heck anyone thought a circ pump on a non-circulating system would work. Then I found the thermostatic mixer under the MB lav and figured it out. I was not able to test it but I sure would have liked to have given it a test run just to see if it worked.
No announcement yet.
Hot Water pump