The CDS-John Blue DP-687-P Poly Diaphragm Pump is a high flow commercial pump suited for a wide range of low-pressure applications, including gardening, liquid transfer, and powering large sprayers and washers. From its pre-formed diaphragm material to its short crankshaft stroke, this pump is designed with longevity in mind, and its plastic coated components can withstand corrosion from most industrial and agricultural chemicals. With a high flow rate of up to 68 gpm it outperforms it's peers in the poly pump market.