The GRACO 105445 BALL (.5000) is a stainless steel inlet ball used in the fluid section of GRACO displacement pumps. It functions as a critical sealing and check valve component, ensuring proper fluid flow and preventing backflow within GRACO airless paint sprayers and similar equipment. Key Features: Inlet ball 0.5 inch (13 mm) diameter 440C stainless steel GRACO displacement pumps and large contractor airless paint sprayers Durable stainless steel construction for longevity Precision fit for reliable sealing Essential for maintaining pump efficiency and preventing leaks Applications:Used in the fluid section of GRACO displacement pumps, primarily in large contractor airless paint sprayers. Installation Notes: Using genuine GRACO parts ensures optimal performance, reliability, and compatibility with GRACO equipment. Ensure the pump is depressurized and cleaned before installation Replace the ball as part of regular maintenance or when wear is detected Follow GRACO’s recommended maintenance schedule for best results