going from hot water line in house and require a low voltage low volume inline pump to slowly draw hot water from hot water tank into a fin rad and back in a loop to hot water tank. 2-4 gallons an hr would be sufficient. Does anyone have this type of pump i could purchase.

Hydronic system running a First Co. 24MBXR-3HW air handler in the attic, with a Honeywell L6006C-1018 aquastat attached. (I think that might be a commercial unit, but it is installed in my home). This season, the air handler seems to be cycling on and off too quickly. The aquastat was set to 175, and inside is a notched wheel (the differentiator?) which is set to 5. I tried setting the 170 up and down 5 degrees, but no help - too high, and it didn't come on at all. Lower, and it didn't make a difference. Am I looking at the right setting? Should I change the differentiator setting? Thanks, JimR