American Water Solutions Compatible to Millennium MRO-35 Water Filter

Our review of the American Water Solutions compatible filter set finds it best suited for homeowners who need an affordable, straightforward replacement for the Millennium MRO-35 system. The bottom line: this kit delivers the expected contaminant reduction and basic post-filtration polishing without fuss, making it a practical choice for people who prioritize value for money and reliable everyday performance. Installation is simple for anyone familiar with under-sink reverse osmosis components, and the combination of a carbon GAC, carbon/sediment prefilter, and a 6' quick connect inline post filter covers the key stages the MRO-35 requires.

Key Features

• Compatible filter set: Designed to fit the Millennium Reverse Osmosis MRO-35 system so replacements align with the original flow path and connections.
• Three-stage coverage: The kit includes a GAC carbon filter, a carbon/sediment prefilter and a 6' 3/8' quick connect inline filter to address sediment, chlorine taste and post-system polishing.
• Easy installation: The 3/8' quick connect inline filter simplifies swap-outs and reduces installation time for routine maintenance.
• Removes common contaminants: The included carbon elements are effective at reducing unwanted contaminants that affect taste and odor in drinking water.
• Cost-effective replacement: Packaged as a set to replace multiple stages at once, providing a straightforward way to refresh an existing RO system on a budget.

Who It's For

This kit is a sensible buy for owners of the Millennium MRO-35 reverse osmosis system who need a quick and affordable replacement set and who want the convenience of matched components for pre-, carbon and post-filtration stages. It suits renters or homeowners looking for reliable everyday water improvement without paying a premium for brand-name originals.

Those who need specialized contaminant removal (such as heavy metals testing, fluoride reduction, or NSF-certified media lists) or who require documented third-party certifications should consider OEM parts or specialty filters that explicitly state those capabilities. The kit is focused on practical, general-purpose filtration rather than advanced or certified contaminant-specific treatment.

Pros & Cons

Pros

• Good overall value for money compared with buying individual replacement elements.
• Includes the key three stages for a standard RO system: prefilter, GAC carbon and inline post filter.
• The 3/8' quick connect inline element makes post-system maintenance faster and cleaner.

Cons

• Not marketed with third-party certifications, so users seeking certified performance data should look elsewhere.

Specifications

Our Verdict

The American Water Solutions compatible set is a practical, budget-friendly replacement for MRO-35 owners who want straightforward contaminant reduction and easy installation. It is good value for routine maintenance and restores the basic filtration stages of the reverse osmosis system, though buyers seeking certified or specialized contaminant removal should verify specific media claims or choose certified alternatives.

Frequently Asked Questions

Does this kit fit the Millennium MRO-35?
Yes, the set is designed to be compatible with the Millennium Reverse Osmosis MRO-35 system.

What filters are included?
The kit includes 1 S7125 GAC carbon filter, 1 S7128 carbon/sediment prefilter, and a 6' 3/8' quick connect inline post filter.

Is installation difficult?
Installation is straightforward for typical under-sink RO systems thanks to the 3/8' quick connect inline filter and standard replacement sizes.