ReadyTemp

http://www.readytemp.com/ contains information about hot water circulating pumps, recirculating pump

Manufacturing ReadyTemp Hot Water Circulation systems for commercial and residential structures. Providing convenient hot water to consumers while saving thousands of gallons of water annually from each system. ReadyTemp also is the #1 solution to preventing pipes from freezing in Snow Cabins, RV's, residential and commerical properties using a fraction of the energy consumed by heat tape.