RSV4G40HDF40EZ This series pump is designed to direct drive on gasoline engines ranging from 5 & dash; 13 h.p. Intended use for medium to heavy tasks; this triplex plunger pump features the latest in design and technology. Life tested over 500 hours at maximum performance of 4 GPM at 4,000 psi. The RSV is a result of our combined 60 years of pumps building experience and expertise