Vexca Swimming Pool Filter Cartridge for Sta‑Rite System 3 S7M120 — 50‑Micron Trilobal Pleat

Vexca® Swimming Pool Filter Cartridge compatible with Sta‑Rite System 3 S7M120 and similar models is a drop‑in replacement cartridge engineered for finer 50‑micron filtration and improved dirt‑holding capacity.

This replacement cartridge is built to fit System 3 S7M120, SR300, 25021‑0200S and 25022‑0201S housings and uses a trilobal, three‑leaf pleat fabric to increase filtration surface area while resisting deformation. Constructed from chlorine‑resistant end caps and BPA‑free components, the cartridge is IAPMO‑tested to NSF/ANSI 50 standards. It’s a non‑OEM, compatible option intended to deliver consistent particle removal and straightforward maintenance for above‑ground and in‑ground spa and pool filter systems.

How does this cartridge deliver better filtration than a standard replacement?

The Vexca cartridge employs advanced pleating and "Dirt Lock" design principles to trap smaller particles and hold more debris between cleanings. A 50‑micron rating offers finer capture than many basic cartridges, while the multi‑leaf fabric expands effective surface area without increasing outside dimensions.

• Filtration rating: 50 microns for finer particle capture.
• Trilobal three‑leaf fabric increases pleat density and surface area.
• Dirt Lock pleat structure retains debris for longer service intervals.
• Approximately 30% greater dirt‑holding than standard cartridges (manufacturer comparison).

Will this cartridge fit my System 3 or SR300 filter housing?

Measure your existing cartridge to confirm fit: the inner filter measures 25 1/4" long with an 8 3/4" outside diameter, while the outer filter measures 18 3/4" long with a 16 1/2" outside diameter. This cartridge is manufactured to match the dimensions used by Sta‑Rite System 3 S7M120 and compatible SR300 models, but you should verify sizing before purchase.

• Inner cartridge: 25.25" length, 8.75" OD, ~100 sq ft filtration area.
• Outer cartridge: 18.75" length, 16.5" OD, ~200 sq ft filtration area.
• Compatible with 25021‑0200S and 25022‑0201S style housings.
• Not intended for backwashing—do not use in backwash processes.

How easy is installation and routine cleaning?

Installation is tool‑free and straightforward: lift the old cartridge out and seat the replacement in the housing. The trilobal fiber surface sheds debris when rinsed, making regular maintenance quick; a pressure rinse every two weeks is recommended under typical conditions.

• Tool‑free swap reduces downtime and effort.
• Rinseable pleat surface releases trapped dirt easily.
• Super adhesive band keeps pleats separated for better flow.
• Remove cartridge before adding oxidizing disinfectants to avoid damage.

What materials and safety certifications does the cartridge have?

Vexca cartridges use BPA‑free plastics and chlorine‑resistant end caps to resist cracking and degradation. The product has been tested by IAPMO to NSF/ANSI 50 standards, providing independent verification of material safety and structural performance for pool and spa applications.

• IAPMO‑tested to NSF/ANSI 50 standards.
• BPA‑free components for safer contact with pool water.
• Chlorine‑resistant end caps for extended durability.
• High‑strength adhesive band prevents pleat collapse.

Who is this for? This Vexca replacement cartridge is suited for pool and spa owners who need a compatible, higher‑performance alternative to original replacement parts for Sta‑Rite System 3 S7M120 and similar models. It’s ideal for operators wanting finer filtration, longer dirt‑holding capacity, and easy maintenance—provided you confirm dimensions and avoid backwashing use.