Super-Pro XtremeBlue A7 for Pentair Clean & Clear 520 - Filter Cartridge 4 Pack | X15-ULT-A7-M-Q4 Ladder & Rail Mounting Hardware This kit provides a complete

This kit provides a complete 4-inch thermoplastic PVC socket-style flange connection with all required hardware included

Pentair Max-E-ProXF VS Max-E-ProXF VS Riser plate for XF to Challenger conversion

Brand Equipment Line Model / Part Number Notes Pentair FNS Plus Filter — FNS Plus Series FNS PLUS 48 Standpipe outlet assembly

When the gasket deteriorates

Super-Pro XtremeBlue A7 for Pentair Clean & Clear 520 - Filter Cartridge 4 Pack | X15-ULT-A7-M-Q4 Ladder & Rail Mounting Hardware This kit provides a completeSuper Pro X15 ULT A7 M XtremeBlue A7 Single Replacement Filter Cartridge, for use with Pentair Clean & Clear Plus 520 Cartridge Filter. This is a FOUR cartridge replacement pack. Clean & Clear Plus 520 requires four to fully service. We recommend replacing all cartridges at once to ensure even and regular servicing of your filter. For the single filter cartridge, see this product.