Unique design allows float controlled reservoir to serve as standard breaker tank regulator for your automatic water system. In cold weather, the recirculating pump keeps heated water moving through the lines to prevent freeze ups. One Freeze-x unit is capable of servicing approximately 200 feet of 1/2" rigid PVC line. 1/2" MPT inlet and 1/2" FPT outlet is adaptable to most any connection needed. Includes submersible heater with built-in thermostat for added protection.