Abstract: Apparatus for clearing frozen water lines or conduits includes a wheel mounted cart or main frame supporting a holding tank or reservoir open to the atmosphere along with means for heating the holding tank. A vertical standpipe has a top end portion open to the atmosphere and a bottom end portion which can be attached to, and longitudinally aligned with, an open end portion of an ice blocked conduit to be cleared. A first hollow return line is open from a part of the standpipe vertically above the holding tank and into the holding tank. A second hollow return line is open from a portion of the standpipe above the first return line and below the open top of the standpipe, and it, too, opens into the holding tank. An inner end of a length of flexible tubing is extended down through the standpipe and into the conduit to be adjacent to the ice to be cleared. A pump is open to the bottom of the holding tank and to an outer end of the flexible tubing.