This transfer pump is suitable for oil, diesel fuel, or water. Can transfer hot or cold oil to and from the engine oil pan. Ports are 3/8" internal and 3/4" garden hose thread fittings. 3-position switch with lock is directionally oriented for easy operation. Generates up to 15 psi. Self-priming and reversible (drain and fill). Reversible pump and motor with supply and drain hoses. Electrical components and fittings. Motor is standard with a built-in switch guard and fuse.