AO Smith Under Sink Water Filter AO-US-200 | Reduces PFAS, Lead & Chlorine

Pure water, right at your tap

Meet the AO Smith AO-US-200, a two-stage under-sink filtration system designed for busy kitchens. It connects to a dedicated faucet via a quick-install tee and the included tubing, so you can start filtering in minutes without calling a plumber.

What it filters and preserves

This filtration setup targets a broad set of contaminants while preserving minerals that contribute to taste and hydration. It reduces lead, PFAS (PFOA and PFOS), chlorine, mercury, asbestos, chloramines, and select pharmaceuticals, while intentionally not lowering total dissolved solids (TDS).

• Certified performance to NSF/ANSI standards 42, 43, and 401
• Long-lasting filters, up to 6 months or 500 gallons

Maintenance and cost efficiency

Designed for steady performance with minimal waste, this system delivers water at about 0.5 gallons per minute, ensuring a reliable flow for daily use. Replacement costs stay predictable, around $120 per year when following the recommended schedule.

• No water waste; filtration adds no harmful contaminants
• Compact, under-sink design fits most kitchens

Why choose AO Smith AO-US-200

Beyond filtration, the system emphasizes reliability, certified quality, and straightforward setup. It delivers filtered water to a dedicated faucet for drinking and cooking, enhancing the everyday water experience without making promises you can’t test in your own home.