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, 1x12' Hose, and Ball Valve. Top mounted on barrels or totes