Balboa AX40 Overlay [J1/J2/J3/J4] (11823) aquastar The Pentair R173576 replacement filter

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

or facilities that need regular access to the product

Supports dependable resealing during light service

making it especially useful where replacement parts need to preserve the original styling of the installation

Balboa AX40 Overlay [J1/J2/J3/J4] (11823) aquastar The Pentair R173576 replacement filterThe 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