For sale is a Graco Husky Model 515 Air Operated Double Diaphragm Pump. Pump is tagged: Part No.D51211 / Series D01D. 15 Gallons per minute maximum flow rate. 100 PSI Maximum operating air pressure. This pump is equipped with an outboard regulator valve and pressure gauge. NOTE: I will remove any outboard pipe that is not part of the pump and/or valve before shipping.It has a colored liquid inside that was used like plastidip.