Buyer Guides
Everything you need to make the right choice — types, features, and what actually matters.
How Long Do Water Filters Last? (2026 Guide)
How long do water filters last? A type-by-type breakdown in gallons and months, plus the signs your filter is spent even when the water still tastes fine.
How to Choose a Water Filter (2026 Buyer's Guide)
Match the right water filter to your contaminants: pitcher, faucet, under-sink, RO, or whole house. NSF certs, cost of ownership, and when you don't need one.
How to Test Your Tap Water Quality (2026)
How to test your tap water: EWG database, Consumer Confidence Reports, DIY kits, TDS meters, and certified lab panels. What to test for and how to read results.
How to Install an Under-Sink Water Filter (Step by Step)
Step-by-step guide to installing an under-sink water filter yourself. Tools, shutoff valves, tubing, flushing, and when to call a plumber.
How to Maintain Your Water Filter (Replacement Schedule Guide)
Water filter maintenance and replacement schedules for pitchers, faucet, under-sink, reverse osmosis, and whole-house systems, plus an annual cost breakdown.