Pentair Sta-Rite System 3 S7S50 21" Lateral [Qty 16] (24900-0002) watertestkits Air controls like this are

Air controls like this are used to manage the amount of air introduced into the system

Maintains compatible larger-system valve layout

Precision-built motors ensure consistent system output

A main drain like this is useful because it restores the core drain fitting while preserving the original size

Pentair Sta-Rite System 3 S7S50 21" Lateral [Qty 16] (24900-0002) watertestkits Air controls like this areThis replacement part supports a cleaner, more dependable service outcome when the existing component is worn, missing or difficult to reuse. Replacing worn filter hardware helps maintain pressure control, secure sealing and dependable filtration performance. Whether the job involves a filter, pump, valve or cleaner repair, details such as size, seal style, pressure rating and model family matter. This item helps keep the repair aligned with the