The stainless steel valves and anodized aluminum construction of the Comet APS51MF Diaphragm Pump make it particularly resistant to chemicals. This three diaphragm, high-pressure unit is ribbed for easy trailer or tractor mounting and ideal for multiple horticultural, agricultural, lawn care, hydrostatic tests, and nursery spraying and pumping applications, such as de-icing, pesticides, herbicides, liquid fertilizers, and other difficult-to-manage fluids.