The SP818 backpack sprayer has a 2-piston pump powered by a 4-cycle air-cooled Robin engine. Pump is capable of delivering pressure up to 310 PSI. The 6.2-gallon polyethylene tank uses Viton® seals and Nytril O-rings. Can be used to disinfect animals, stables, warehouses and more. Hose can be attached to either right or left side; unit can also be operated with two hoses simultaneously. Low center of gravity minimizes operator fatigue.