US Patent Issued for Outdoor Circulator with Freeze Protection

AquaMotion, a U.S. manufacturer of hot water recirculation products, plumbing and heating circulators, was awarded Patent (No. 18) for its outdoor installed recirculation pump.

The pump was designed for use with outdoor installed tankless water heaters that do not have a built-in circulator. Five kits are available. Two for dedicated return line, three kits for single pipe and on demand systems. The stainless union and flanged pumps can handle a total pipe length of 250 to 600 feet. The on demand kits include ODR bypass valves and AMK-WB on-demand controls.

Another application for the pump is for outdoor installed wood boilers. The pump’s unique design protects the pump from wind, cold, heat and water. The outdoor enclosure is sealed to the pump and is lockable. It houses the wiring, the terminals, is vented, has drains and is insect protected.

The on/off temperatures are higher to compensate for the outdoor temperatures, which can adversely affect the proper operation of the pump. In addition, the pump has built-in freeze protection; if the temperature drops below 40 F, it turns on the pump to protect it from freezing. The kits are UL and NSF listed and built in Rhode Island.