Filter Tested
Independent, hands-on reviews of water filters, water softeners, and reverse-osmosis systems — tested for contaminant reduction, flow, capacity, and long-term value.
Water Filter Reviews
Hands-on reviews of filters, softeners, and RO systems.
Head-to-Head
Direct comparisons of the systems people cross-shop.
Buying Guides
How to choose by contaminant, water source, and budget.
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Our top faucet-mounted water filter picks.
Latest reviews and guides
All articles →- 3M Aqua-Pure AP903 Whole-House Sediment Filter
In-depth review of the 3M Aqua-Pure AP903 whole-house sediment filter. 20 GPM, 100,000-gallon capacity, NSF/ANSI 42 certified, Sanitary Quick Change design.
- 3M Aqua-Pure AP903 Review (2026)
3M Aqua-Pure AP903 whole-house water filter review. Stainless steel housing, 100,000 gallon capacity, and sediment removal tested.
- Activated Alumina for Fluoride Removal
Complete guide to activated alumina for fluoride removal. Learn how this porous aluminum oxide media works, optimal.
- Activated Carbon Water Filter: Complete Guide
Learn how activated carbon water filters work, what they remove, types of carbon media, NSF certifications, and how to choose the right system for your home.
- Alexapure Pro Review — Filter Tested
In-depth Alexapure Pro gravity water filter review. Tested 4-stage ceramic/carbon/zeolite/silver filtration, 5,000-gallon life, 99.9% fluoride removal, 2.
- Alexapure Pro Water Filter Review (2026)
In-depth Alexapure Pro review: specs, contaminant removal, cost per gallon, and how it compares to Berkey and Propur gravity filters.
- ANSI Water Quality Standards: What They Mean
ANSI water quality standards explained: NSF/ANSI 42, 53, 58, 401, P473, P231 and more. Learn how ANSI accredits.
- APEC RO-90 Review — Best 90 GPD RO | FilterTested
APEC RO-90 review: the best 90 GPD budget reverse osmosis system. Same 5-stage design as the ROES-50 but 80% more water production. Perfect for families of 3+.
- APEC ROES-50 Review (2026)
In-depth review of the APEC ROES-50 5-stage RO system. 50 GPD, NSF/ANSI 58, WQA Gold Seal, made in USA, 0.0001 micron TFC membrane. Tested 18 months.
- APEC Ultimate RO-90 Review (2024)
In-depth review of the APEC Ultimate RO-90 5-stage reverse osmosis system. 90 GPD, NSF/ANSI 58 certified, 0.0001 micron filtration, made in USA.
- APEC vs iSpring: RO System Comparison (2026)
APEC ROES-50 vs iSpring RCC7 reverse osmosis system comparison. Side-by-side specs, filter costs, installation difficulty, and warranty coverage for 2026.
- AquaBliss SF100 Shower Filter Review (2026)
In-depth review of the AquaBliss SF100 12-stage shower filter. 10,000-12,000 gallon capacity, 90%+ chlorine reduction.
- Aquasana Clean Water Machine Review 2026
In-depth review of the Aquasana Clean Water Machine powered countertop filter. Claryum 4-stage filtration, NSF/ANSI.
- Aquasana Rhino EQ-1000 Whole-House Filter Review
In-depth review of the Aquasana Rhino EQ-1000 whole-house water filter. 1,000,000-gallon capacity, 3-stage filtration, 7 GPM, NSF/ANSI 42, 53, P473 certified.
- Aquasana Rhino 1,000,000-Gallon Whole-House
In-depth review of the Aquasana Rhino 1,000,000-gallon whole-house water filter. 3-stage filtration, NSF/ANSI 42, 53, P473 certified, 7 GPM, 6-year warranty.