Vacuum Hydro Aspirator Filter Pump - Humboldt-
The hydroaspirator will perform under both high and low water pressure conditions. The pump features a ball-type positive action valve in the suction tube which will prevent water backflow if the pressure is reduced.
The water inlet connection thread is a standard 3/8" NPT taper.The hydro aspirator vacuum filter pump is manufactured in the U.S.A. by Humboldt.
At a water pressure of 30 psi this aspirator will reduce atmospheric pressure by 29.5" Hg.
The actual vacuum attained with this pump is directly proportional to the water pressure and current barometric pressure!