APEC Water ULTIMATE Series FILTER-MAX90-38 – US Made 90 GPD Undersink RO Replacement, 3/8-inch Quick Connect

Five-stage filtration designed for your undersink system

The APEC Water ULTIMATE Series FILTER-MAX90-38 is a US-made, five-stage replacement kit crafted for undersink RO systems. Built around a 90 GPD membrane and standard 10-inch filters, this kit emphasizes durability, efficiency, and enhanced water quality through meticulous component choices and simple, reliable installation.

Stage 1 — sediment filtration: A high-capacity 10-inch polypropylene sediment filter captures dust, particles, and rust. Its dense depth filtration offers strong dirt-holding capacity, translating to longer intervals between changes and cleaner pre-filter water entering the next stage.

Stage 2 & 3 — carbon block filtration: Premium extruded carbon blocks tackle chlorine, tastes, odors, cloudiness, and colors. These stages also help remove VOCs and other common chemicals, contributing to a cleaner baseline for downstream filtration and a more palatable taste profile.

• Improved taste and odor control from carbon filtration
• Less turbidity and color in filtered water

Stage 4 — membrane filtration: The Dow FilmTec 90 GPD RO membrane provides high rejection across a broad contaminant spectrum. This stage targets dissolved contaminants that affect safety and flavor, helping to reduce exposure to substances often discussed in water quality guidelines.

Stage 5 — coconut shell refining carbon: The 3/8-inch quick-connect TCR (Total Contamination Removal) carbon filter helps remove any residual taste from the storage tank, contributing to a more consistent water experience at the faucet.

Real‑world use and benefits

Designed for home users seeking a robust, US-made filtration solution, this kit emphasizes reliability and long service life. Expect easier maintenance with high-capacity sediment filtration, effective chlorine and taste/odor reduction from carbon stages, and strong overall filtration performance from a trusted manufacturer.

• Long filter life through high-capacity sediment stage
• Better-tasting water with multiple carbon filtration steps
• High-performance RO membrane for broad contaminant rejection

Important notes: authenticity and warranty terms vary by purchase channel. Please purchase genuine APEC Water Systems products in new condition from official channels or authorized retailers to ensure warranty coverage and support. The information here reflects the product’s known capabilities and assembly for standard undersink RO configurations.

What you get and compatibility

• Sediment filter
• Two carbon block filters
• Dow FilmTec 90 GPD membrane
• 3/8-inch quick-connect inline carbon filter

Compatible with most 10-inch industry-standard RO systems and 3/8-inch output tubing, the MAX90-38 kit is intended for straightforward replacement in standard undersink setups. The well‑defined component lineup helps you refresh filtration while preserving system performance.

For authenticity and support, review warranty details with the seller and contact APEC Water Systems if you have questions about compatibility or installation. This kit is presented to help you explore a potential upgrade path for improved water quality in daily use, without promising guaranteed results.