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Part 0278242 Inlet Valve Assembly is a one-way pump component that controls fluid intake in compatible SprayTech sprayer systems.
It allows coating material to enter the pump during the intake stroke while preventing backflow, helping maintain proper pressure and consistent priming. When the valve becomes worn or begins to leak, the sprayer may lose suction or struggle to prime correctly.
Replacing the inlet valve assembly restores reliable priming performance, improves pump efficiency, and helps maintain steady fluid delivery in compatible SprayTech AirCoat and ED655 Plus models.