The "C" version of the Hypro 6500 roller pump is recommended if you are only going to pump water. The "C" can be used in agricultural applications. For longer life you can switch to the "N" or "XL" versions. Wettable powders will shorten the life of the rollers because of the increased friction. Parts and repair kits are available from Rittenhouse. You will need a reverse rotation version of the 6500 if you are driving it with a gas engine and you are pointing the shafts directly at each other. These pumps are design for a tractor PTO which turns opposite to a gas engine. Instructions are included to reverse the pump.