Warren Rupp”s SANDPIPER HDB air-operated, double-diaphragm ball valve pumps are designed for thin-to-viscous and small solids-laden fluids. The pumps provide solid suction-lift capability and variable-porting options (side, top, bottom, and dual). HDB pumps are thick-wall constructed of sand casted aluminum, cast iron, stainless steel, or Alloy C, with elastomer TPE (thermal plastic elastomers) and PTFE options in diaphragms and check valves. An extended-wear package is also available.