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

or damaged enough to reduce effective flow and debris capture

The 3/4 inch format gives this part practical value because flow-sensing components work best when the replacement matches the original plumbing and control relationship closely

and 115 or 230 volt compatibility

1/4 pound air configuration supports intended flow control

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