The Humboldt H-12130 Richards aspirator filter pump has a ball-type check valve to prevent water backflow on loss of pressure and is suitable for vacuum filtrations in a variety of pressure conditions. It has an integrally cast side arm, plated brass nozzle, and cast aluminum baffle tube. The nickel-plated pump resists corrosion and has a 3/8" National Pipe Taper (NPT) thread water inlet connection and a 12.5" length. Humboldt Manufacturing manufactures testing equipment for construction materials and soil. The company, founded in 1909, is headquartered in Elgin, IL.
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