12VDC Electric Diaphragm Pump with reciprocating, spring driven configuration that maintains constant pressure regardless of load. Pump automatically goes neutral when the end of hose valve is shut off. Glass-reinforced polypropylene pump housing provides integrity and excellent material compatibility inside and out. Santoprene Diaphragms, EPDM Elastomers and 2" bung adapter integral to the inlet. Includes Telescoping Polypropylene Suction Tube, 1"x12' Hose, and Ball Valve. Top mounted on barrels or totes