Why are owners of self-service car washes and tunnel prep units swapping out their old sprayer pumps with new versions of this Hypro 2433B-P Plunger Pump? Because they're specially made for use in the car wash industry. Select this model that's precision-tooled to deliver high-pressure streams over long periods of time, capable of a maximum flow rate of 7.1 GPM as well as an upper pressure limit of 2500 PSI.