APEC FILTER-MAX90 90 GPD Complete Replacement Filter Set - Long Life

In this review the APEC FILTER-MAX90 complete replacement set is examined for homeowners and renters who rely on an under-sink reverse osmosis system and want durable, high-quality filtration. The bottom line: this USA made 5-stage kit and the included 90 GPD Filmtec membrane deliver consistently clean, great-tasting water and longer service intervals, making it a sensible choice for anyone prioritizing reliability and low maintenance in potable water treatment.

Key Features

• USA made 5-stage set: The complete kit is manufactured in the United States to provide consistent component quality and compatibility for standard 50-90 GPD RO systems.
• Filmtec 90 GPD membrane: The Dow Filmtec membrane is individually lab tested for high rejection rates, which helps remove up to 99% of impurities for safer drinking water.
• Longer service life: Premium pre-filters are designed to last over 12 months while the membrane and post carbon filter last 3-5 years, reducing the frequency of replacements.
• Includes full cartridge set: The kit contains sediment and carbon block pre-filters, the membrane, and an inline post carbon filter to address particles, chlorine, and taste.
• Replacement O-ring set: The add-on set of three 3.5 in OD O-rings is made from NSF-compliant materials for standard APEC RO housings and simplifies routine maintenance.

Who It's For

The FILTER-MAX90 is well suited for homeowners with an under-sink RO unit rated around 50-90 GPD who want a long-lasting, high-rejection membrane and matched pre- and post-filters. It is also a good pick for anyone who prefers components made in the USA and expects fewer filter changes over time.

It is less appropriate for users with nonstandard housings or systems that require different sized cartridges, and those looking for an economy, short-term filter option may prefer single-piece cheaper cartridges rather than a higher-capacity set designed for longevity.

Pros & Cons

Pros

• High-quality, USA made components that contribute to reliable performance and longevity.
• Filmtec 90 GPD membrane with strong impurity rejection improves water taste and cleanliness.
• Long service intervals for pre-filters and membrane reduce maintenance frequency and downtime.
• O-ring set included and NSF-compliant materials make routine replacements straightforward and safe.

Cons

• The upfront cost reflects higher-quality parts, so value perceptions vary among users.
• Compatibility requires standard 3.5 in OD housings, so confirm fit before purchase.

Specifications

Our Verdict

The APEC FILTER-MAX90 replacement set is recommended for users who want dependable, long-lasting filtration and a high-performance Filmtec membrane to maximize impurity removal and water quality. While not the cheapest option, the reduced replacement cadence and USA made components offer good value for households that prioritize ease of maintenance and consistently clean, great-tasting drinking water.

Frequently Asked Questions

Is this set compatible with my RO system?
It fits standard under-sink RO systems with 1/4 in output and 3.5 in OD housings such as APEC RO-90 and RO-PERM; check housing diameter before ordering.

How often will I need to replace the filters?
Pre-filters typically last 12+ months while the membrane and post carbon filter last about 3-5 years depending on water quality and usage.

Are the O-rings safe and easy to install?
The set of three 3.5 in OD O-rings is lightweight, NSF-compliant, and intended for straightforward installation and replacement during routine service.