POOLPURE Antimicrobial Spa Filter 5x9 Drop-In | Replaces Pleatco PRB35-IN-M, Unicel C-4335RA & More

Clearer water, stronger filtration for your spa

Meet the POOLPURE Antimicrobial Spa Filter, a drop-in cartridge designed to replace common models while delivering enhanced filtration and simpler maintenance. The filter uses a Trilobal Fabric that helps deter microbial growth and provides steady performance through regular spa use. With a focus on reliable water clarity, this cartridge supports your routine so you can enjoy relaxing soaks with less fuss and more consistency.

Key benefits you may notice

• Certified filtration performance — NSF/ANSI 50 tested and IAPMO-certified filtration capacity for clean, inviting water.
• Trusted industry standards — Proud member of the Pool & Hot Tub Alliance (PHTA) for consistent performance and quality.
• Athlete-endorsed reliability — Real-world testing in training environments and visibility in media coverage reflect dependable filtration where it matters.
• Antimicrobial fabric — Fabric infused to inhibit growth of unwanted organisms, contributing to ongoing protection during the filter’s lifetime.
• Longer service life — Designed for extended use with straightforward cleaning to recondition performance between replacements.
• Easy to clean — Trilobal fabric structure helps release trapped debris; regular cleaning keeps your spa circulating water efficiently.
• Compatibility and cross-reference — Replaces several popular models, simplifying shopping with a single, versatile option.
• Usage note — Not designed for backwashing; follow recommended cleaning cycles for best results.

In practical terms, this means calmer, clearer spa water during weekend soaks, after long days, or during post-workout recovery—without making promises about outcomes. It’s one possible step toward steady filtration performance, backed by industry standards and real-world testing.

How it fits into your spa routine

• Maintenance cadence — Many users rinse every two weeks to maintain flow and filtration efficiency, extending the time between full cartridge changes.
• Water experience — A cleaner intake can help reduce impurities, supporting a more inviting soak and easier chemical balance checks.

Specs at a glance

• Length: 9 1/4 inches
• Outer diameter: 5 inches
• Top/bottom opening: 2 1/8 inches
• Filtration area: 35 sq. ft.
• Compatible replacements include widely used models; POOLPURE remains an independent, compatible option

For spa owners seeking a reliable filtration option with a focus on ease of maintenance and real-world performance, POOLPURE offers a practical choice that aligns with standard replacement needs and a straightforward cleaning routine.