{"product_id":"poolzilla-replacement-inner-outer-filter-cartridges-for-sta-rite-system-3-s7m120-24-9-18-16-trilobal-fiber","title":"Poolzilla Replacement Inner \u0026 Outer Filter Cartridges for Sta‑Rite System 3 S7M120 — 24\"×9\" \u0026 18\"×16\", Trilobal Fiber","description":"\u003cp\u003e\u003cstrong\u003ePoolzilla replacement inner and outer cartridges restore filtration for Sta‑Rite System 3 S7M120, delivering clearer pool water with easy cleaning and reliable fit.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese two OEM‑compatible cartridges (one inner and one outer) are made for the Sta‑Rite System 3 S7M120 modular media filter. Manufactured with a trilobal fiber structure in the United States, they are designed to trap fine particles while resisting clogging and simplifying rinsing compared with older point‑bonded styles. This listing includes the inner cartridge sized 24\" long by 9\" outer diameter and the outer cartridge sized 18\" long by 16\" outer diameter, offering a direct swap for model numbers 25021‑0200\/25021‑0200S (inner) and 25022‑0201S (outer).\u003c\/p\u003e\n\n\u003ch3\u003eHow do these cartridges improve my pool's clarity?\u003c\/h3\u003e\n\u003cp\u003ePoolzilla cartridges capture suspended solids such as sand, silt, scale particles and rust that cause cloudy water. The trilobal fiber weave increases surface area, so more debris is intercepted before it reaches the tank bottom. Over time, consistent filtration reduces visible turbidity and can lower taste and odor caused by chlorine byproducts.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHigh surface area media for finer particle capture\u003c\/li\u003e\n  \u003cli\u003eRemoves sediment, sand, silt and rust particulates\u003c\/li\u003e\n  \u003cli\u003eHelps reduce chlorine taste and odor with regular use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these fit my Sta‑Rite System 3 S7M120 without modification?\u003c\/h3\u003e\n\u003cp\u003eYes — the cartridges are manufactured to match the dimensions and design of the original Sta‑Rite System 3 S7M120 replacement parts. They are sold as a set (one inner, one outer) to maintain the filter’s intended flow path and performance. No trimming or adhesive is required when you install them according to your filter's manual.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInner cartridge: 24\" length × 9\" outer diameter × 4\" inner diameter\u003c\/li\u003e\n  \u003cli\u003eOuter cartridge: 18\" length × 16\" outer diameter × 10\" inner diameter\u003c\/li\u003e\n  \u003cli\u003eDirect swap for part numbers 25021‑0200\/25021‑0200S and 25022‑0201S\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I clean and maintain these replacement cartridges?\u003c\/h3\u003e\n\u003cp\u003eRinse the cartridges with a garden hose after backwashing to dislodge trapped debris, paying attention to pleat valleys. Periodically soak in a cartridge cleaner to remove oils and scale if you notice reduced flow. Inspect seals and end caps for wear and replace cartridges when pleats become damaged or permanent staining occurs.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHose‑off weekly or after heavy debris events\u003c\/li\u003e\n  \u003cli\u003eUse a commercial cartridge soak for oils and mineral buildup\u003c\/li\u003e\n  \u003cli\u003eReplace when pleats tear or flow loss persists after cleaning\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat benefits come from the trilobal fiber design?\u003c\/h3\u003e\n\u003cp\u003eThe trilobal filament geometry increases effective media area and sheds debris more readily than typical point‑bonded cartridges. That design reduces clogging, shortens rinse times, and can extend usable life between replacements. It also maintains structural stability to preserve even flow through the filter.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eGreater filtration area per pleat for improved capture\u003c\/li\u003e\n  \u003cli\u003eLess point bonding = easier cleaning and debris release\u003c\/li\u003e\n  \u003cli\u003eDurable construction for consistent flow and longevity\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Poolowners and service technicians who run a Sta‑Rite System 3 S7M120 and need a dependable, easy‑to‑clean cartridge set. These Poolzilla replacements are suited for seasonal maintenance, midseason performance refreshes, or whenever worn cartridges reduce circulation and clarity. If you want American‑made media with a design focused on higher capture efficiency and simplified upkeep, this inner and outer cartridge set provides a practical, drop‑in solution.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these cartridges made in the USA?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. These Poolzilla cartridges are manufactured in the United States.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need both inner and outer cartridges for replacement?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The set includes one inner and one outer cartridge designed to work together for proper filtration.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Poolzilla","offers":[{"title":"Default Title","offer_id":56805513625940,"sku":"B0CJVN56QV","price":538.2,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/poolzilla-front-packaging-sta-rite-s3-filter-set.jpg?v=1786805553","url":"https:\/\/gardenluxe.co.uk\/products\/poolzilla-replacement-inner-outer-filter-cartridges-for-sta-rite-system-3-s7m120-24-9-18-16-trilobal-fiber","provider":"Gardenluxe Uk","version":"1.0","type":"link"}