Balboa AX40 Overlay [J1/J2/J3/J4] (11823) aquastar Matching the proper capacity matters

Matching the proper capacity matters if you want the spa to perform the way it was originally intended

The Pentair R173576 replacement filter cartridge is designed for compatible spa and pool systems where the filter media element needs replacement

supporting smooth water flow and reliable installation

Proper circulation and pressure require components built for accuracy and durability

Useful when the original clamp ring is damaged or worn

Balboa AX40 Overlay [J1/J2/J3/J4] (11823) aquastar Matching the proper capacity mattersThe Balboa AX40 overlay is designed for compatible topside control applications where the original graphic button layer needs replacement. An overlay is useful because it helps clearly identify the available control positions while restoring a cleaner finished look to the panel surface. This replacement is especially useful when the original overlay is faded, peeling, cracked, or no longer easy to read. Matching the correct J1, J2, J3, J4 layout helps