The three-diaphragm, high-pressure design of the Comet APS71 Diaphragm Pump features anodized aluminum heads, a universal drive face, and an internal manifold to reduce leakage. The unit is perfect for high-pressure applications such as hydrostatic testing, weed and pest control, lawn care, and agricultural spraying. This pump manages various hard-to-handle chemicals, such as de-icing materials, herbicides, abrasives, pesticides, and liquid fertilizers.