Waterdrop TSA 8-Layer Under-Sink Water Filter System — PFAS, PFOA/PFOS Reduction, NSF/ANSI 42 Certified

Experience cleaner, better-tasting water from your sink

Waterdrop's TSA 8-Layer Under-Sink Filter System is designed for municipal cold water and connects directly to your faucet. The 8-stage filtration reduces PFAS, PFOA/PFOS, fluoride, residual chlorine, silt, rust, and cysts while preserving minerals that matter. The CT filter carries IAPMO certification to improve taste, and the system is NSF/ANSI 42 certified for reliable, standards-based filtration. Every drop can feel crisper and more refreshing without altering your routine.

What makes it stand out

• Eight-stage filtration targets multiple contaminants for thorough cleansing
• Reduces residual chlorine and fluoride to improve flavor and aroma
• Minerals are retained, so water remains balanced while contaminants are minimized
• Specifically designed for municipal cold water; not intended for hot water or well water
• Direct connect to faucets with 1/2" or 3/8" female NPT threads; no extra faucet is included

Flow, performance, and design

After eight-stage filtration, water may flow more slowly than direct tap water due to thorough purification. The 2026 upgrade optimizes pore structure to reduce clogging while keeping contact time essential for contaminant reduction. In practical use, a standard 12-ounce glass can fill in about 4 seconds under typical conditions, providing a steady stream without fuss.

Durability and reliability

• Rugged, age- and freeze-resistant materials with an upgraded, thicker chassis
• Burst-tested up to 400 psi and lasting performance through 100,000+ pulses at 150 psi
• Stable, leak-resistant construction designed to endure daily kitchen use

Maintenance and lifespans

The three filters offer lifespans of 6 months, 8–12 months, and 12–18 months, depending on usage. For travel, store unused filters in sealed bags in the refrigerator (not the freezer) to preserve freshness for up to 30 days.

Real-world use

Ideal for apartment kitchens, rental homes, and family homes where flavor, odor, and overall water quality matter. The system’s DIY setup is quick and user-friendly, with easy filter changes that fit into busy routines. Note: this system does not reduce TDS.