HANXER Pool Filter Cartridge Set S7M120 — Sta-Rite System 3 Replacement, 300 sq.ft., Trilobal

HANXER S7M120 inner and outer pool filter set is a direct replacement kit for Sta-Rite System 3 cartridges, offering 300 sq.ft. combined filtration with trilobal media and reinforced construction.

Designed to match Sta-Rite part numbers 25021-0200S (inner) and 25022-0201S (outer), this HANXER kit restores filtration performance in compatible pool and spa systems. The pair combines a 100 sq.ft. inner element and a 200 sq.ft. outer element made from advanced trilobal fabric, delivering fine particle capture while resisting pressure and wear. Components are manufactured and tested to NSF-compatible safety standards for long-term water contact.

How does this replacement set fit my existing Sta-Rite System 3 equipment?

The HANXER S7M120 set is engineered to match the critical dimensions and connections of the original Sta-Rite cartridges so installation is straightforward. Always compare the physical measurements and part numbers before ordering to confirm compatibility.

• Inner: 24" length, 9" outer diameter, 100 sq.ft. filtration area.
• Outer: 18" length, 16" outer diameter, 200 sq.ft. filtration area.
• Replaces Sta-Rite 25021-0200/25021-0200S (inner) and 25022-0201S (outer).

What kind of dirt and particles will these filters capture?

The trilobal filtration fabric traps a wide range of common pool contaminants while maintaining good flow characteristics. A dedicated 50-micron high-efficiency layer targets small debris, helping clear hair, leaves, sand, sediment and fine dust from circulation water.

• Trilobal fibers for increased surface capture and particle retention.
• 50-micron high-efficiency layer for fine particulate removal.
• Suitable for pools, hot tubs and similar recreational water systems.

How durable and serviceable are these cartridges?

HANXER engineered this set with reinforced materials and improved bonding to extend usable life under normal conditions. The design includes thickened polyester, reinforced end caps, an ABS internal frame and upgraded adhesive belts to resist tearing, cracking and delamination.

• Triple reinforcement: durable cloth, strong end caps, ABS inner support.
• High-adhesion support bands with >30% stronger bonding compared to standard methods.
• Simple rinse-clean maintenance; avoid backwashing to prevent damage.

What certifications and support come with the filters?

These HANXER cartridges are produced and tested to meet NSF-compatible safety requirements as verified by IAPMO testing, ensuring materials are suitable for long-term water contact. A six-month after-sales warranty covers quality-related replacements and technical support.

• IAPMO-tested in accordance with NSF safety standards for water contact.
• Six-month warranty with replacement for verified manufacturing defects.
• Customer technical support available for fitment or performance questions.

Who is this for: Pool and spa owners, maintenance professionals and service technicians who need a reliable, high-capacity replacement for Sta-Rite System 3 cartridges. Choose this set if you require a matched inner and outer cartridge with high-efficiency trilobal media, reinforced construction for longer service life, and certified materials suitable for regular water contact. Always verify part numbers and physical dimensions against your existing cartridges before purchase to ensure proper fit and function.