By preventing backflow and maintaining proper fluid intake

Receptacles

Cylinder and piston rod are tempered with a proprietary heat-treating process that increases pump life up to 150% longer than competitive pumps

and Mi-T-M pumps

Cat Pumps Pressure Washer Pump - 2000 PSI, 2.0 GPM, Direct Drive, Electric, 1180-1885 By preventing backflow and maintainingThis Cat Pumps Electric Pressure Washer Pump provides a fast changeover even in the field. Pre plumbed and pre tested. Fit 4 bolt engine face plates. Bolts not included; use existing bolts from old pump to install new pump. This is a triplex [three plunger rods] positive displacement, reciprocating, plunger pump, constructed of a brass manifold, 304SS valve assemblies, solid ceramic plungers and standard NBR [Buna N] seals and o rings. This is a