This Hypro 2535S Plunger Pump, rated with a maximum pressure of 1200 PSI and an upper flow rate of 38 GPM, was especially designed for use in the car wash industry. That's why it outperforms other versions that were merely adapted for use in car washes. Choose it for its durability, unparalleled performance and ease of repair and maintenance, fabricated to fight corrosion and stand up to rough operation and abuse.