Abstract: A water line freeze protection system consisting of first and second branch pipes extending from a water service pipe, a water holding tank, a metering orifice between the first branch pipe and the holding tank, a pump and a check valve between the holding tank and the second branch pipe, the check valve permitting flow of water only in the direction from the pump to the second branch pipe, a float and switch secured to the holding tank to activate the pump at an upper water level and deactivate the pump at a lower water level, and an overflow pipe from the holding tank to pass water from the holding tank into a drain when the pump is none operational.