Pentair Spa/Pool Replacement Filter Cartridge (R173216) laingthermotech This slip-to-slip union provides a

This slip-to-slip union provides a straightforward connection for same-size plumbing

Helps simplify larger rigid plumbing layouts

This BP7 Retro Spa Control System is designed for that stage of ownership

0 HP Executive wet side needs a clean

Pentair Spa/Pool Replacement Filter Cartridge (R173216) laingthermotech This slip-to-slip union provides aThe Pentair R173216 replacement filter cartridge is intended for compatible spa and pool filtration applications where the cartridge element needs renewal. A cartridge like this is useful because it serves as the main filtering medium inside the housing, helping trap debris while supporting circulation quality. This replacement is often chosen when the original cartridge is heavily loaded, damaged, softened by age, or no longer filtering effectively