I am selling my Sandpiper dual diaphragm pump 2 inch inlet and 2 inch outlet... runs on air so air compressor is needed ... I bought it awhile back to use for a business that i was gunna start ... but didn't ..this pump can pretty much pump anything from water to driveway sealer with sand in it ... it works as it should ...this pump new today is over $4,000 my loss is your gain