Abstract: An anti-freeze apparatus for use with a recreational vehicle water system having a main water storage tank, a water pump, a hot water heater and domestic cold and hot water supply lines. The invention comprises an anti-freeze storage tank containing a supply of anti-freeze, a first valve mechanism in fluid communication with the anti-freeze storage tank and interposed between the water storage tank and the water pump and a second valve mechanism providing fluid communication between the water heater water inlet, the water heater hot water outlet and the domestic hot water line.

Abstract: A control device is designed for center pivot irrigation units of the type having an elongate water carrying pipe with a plurality of support vehicles spaced therealong, and wherein each of the vehicles includes a double acting hydraulic cylinder mounted thereon for moving the vehicle and the water pipe over the ground. The irrigation unit includes a device for aligning the vehicles, a hydraulic pump with pressure and return lines, and power and retract manifolds respectively interconnecting power and retract sides of the cylinders. The control device includes a hydraulic valve with three positions which communicate the pressure line with the power manifold, the retract manifold, and the pump return line respectively.

Abstract: A liquid transport container unit carried by a vehicle for transporting liquid products such as water or gasoline is disclosed, such unit utilizing an elongated base section positioned parallel to the direction of movement of the vehicle. This base section contains an internal chamber for containing the liquid to be transported. An elongated upper section positioned substantially parallel to the base section is also mounted to the vehicle. This upper section is elevated with respect to the base section and also has an internal chamber for receiving the liquid. A plurality of return portions are connected between the base section and the upper section and are adapted for communicating the liquid between the internal chambers of the upper and base sections.