Pentair Autofill, Gray | T40BG Natural Chemistry This gasket is typically replaced

This gasket is typically replaced during blower service or when air leaks are detected

Their service kits support ongoing maintenance and repair

Fits the Anchor AG Step within the Main Access system

The part number 400-4000 describes a Union Fitting that connects two 1-1/2 in socket ends

Pentair Autofill, Gray | T40BG Natural Chemistry This gasket is typically replacedWhat This Part Is Used For The Pentair T40BG Autofill Gray maintains proper pool water level automatically. It compensates for evaporation through a mechanical float system. Why This Part Matters Consistent water level prevents suction issues and equipment strain. An autofill reduces manual filling and stabilizes operation. It supports reliable skimmer and pump performance. Key Features and Specifications Pentair manufacturer part number: T40BG