Pentair Spa/Pool Replacement Filter Cartridge (R173216) nutsboltsscrews or damaged enough to reduce

or damaged enough to reduce effective flow and debris capture

Matching the existing plumbing style often leads to a smoother and more confident service experience

AquaStar generic white lower body for compatible Hayward-style cleaners

or no longer properly matched to the supported 1

Designed for compatible high-capacity in-line heating applications

Pentair Spa/Pool Replacement Filter Cartridge (R173216) nutsboltsscrews or damaged enough to reduceThe 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