The Reverso OP-6 is a useful transfer pump suitable for oil, diesel fuel or water. The OP-6 can transfer hot or cold oil quickly and cleanly to and from the engine oil pan. Both ports are 3/8” (Int) and 3/4”(Ext) garden hose thread fittings. The three position switch has a safety lock that prevents accidental activation. The switch is directionally oriented (flow is in direction of switch) for easy operation. The pump will generate up to 15 PSI of pressure. Meets ISO 8846 standards.