For your self-service car wash or tunnel prep unit, selecting this Hypro 2340B-P Plunger Pump is a wise move. With a flow rate of 4.2 GPM and a maximum pressure rating of 2500 PSI, this product was specifically tooled for use in the car wash industry, consistently delivering high pressure. And with their rugged, durable construction, they're made to be tough and long-lasting.