Pentair Black AutoFill Lid w/Screw (T10BK) valveparts An impeller is useful because

An impeller is useful because it is one of the most important hydraulic components in the pump

or no longer powers the cleaner as intended

This replacement is especially useful when the original box is corroded

The spring helps the check valve open and close as intended

Supports more efficient plumbing repair in supported systems

Pentair Black AutoFill Lid w/Screw (T10BK) valveparts An impeller is useful becausePentair Black AutoFill Lid w Screw is a genuine Pentair AutoFill replacement component for compatible pool water leveling systems. AutoFill parts help protect the fill assembly, maintain a finished appearance, and support reliable water level management. Replacing a missing, cracked, faded, or damaged cover component helps keep the system accessible and properly protected. This part is a useful choice for pool maintenance, repair, or color matching