Pool Filter Cartridge for Pentair System 3 S7M120

Overview Keep your pool dazzlingly clear all season with the Poolzilla replacement filter cartridge for Pentair System 3 pool filter systems. Standing 24 inches tall with a 9-inch outer diameter, this is a true large-capacity cartridge — and that extra real estate means more pleated surface area working for you, which translates to longer stretches between cleanings and a pump that breathes easier. The durable pleated polyester media traps everything from leaf bits and pollen down to fine, sunscreen-grade particles, so the water your family jumps into looks and feels noticeably fresher. Reinforced end caps lock in a leak-proof seal, ensuring every drop of pool water flows through the filter media instead of sneaking around it. The result? Crystal-clear water, fewer chemical headaches, and more time enjoying the backyard. For best results, plan to rinse your cartridge every four to six weeks and replace it at the start of each swim season — or any time you notice pump pressure climbing 8–10 PSI above normal, water clarity slipping, or your chemicals working harder than they should. A fresh filter cartridge does more than polish the water; it protects your pump motor from unnecessary strain and helps your sanitizer do its job efficiently. Swapping it in is a five-minute job: power down the pump, open the filter housing, lift the old cartridge out, and slide the new Poolzilla cartridge into place. Order yours today so you're ready to open the pool to sparkling, swim-ready water the moment the weather turns warm. What's Included Your order includes the selected quantity of replacement pool filter cartridges. Each unit is individually inspected for quality before shipping.