iSpring CUA4-BLK 0.01 Micron Ultra Filtration Under Sink Water Filter System, High Capacity Tankless 4-Stage Ultrafiltration Water Filter, Removes 99.99% Contaminants, Quick Filter Change with Faucet

The iSpring CUA4-BLK is a 4-stage ultrafiltration under sink water filter system featuring a 0.01 micron membrane that effectively reduces chlorine, lead, rust, and other common contaminants—while preserving beneficial minerals. Unlike RO systems, this tankless under sink water filter produces no waste water and fits neatly under most kitchen sinks. With quick twist-on filters, a lead-free brushed nickel faucet, and NSF/ANSI-compliant components, it's an excellent choice for your home water filtration system. Use it as a drinking water filter, sink water filter, or RV water filter. Installation is fast and DIY-friendly with push-to-connect fittings—no tools or plumber required.

• Powerful 4-Stage Filtration: This under sink water filter system combines PP sediment, KDF, GAC, and a 0.01 micron ultrafiltration membrane to reduce chlorine, lead, rust, chloramine, hydrogen sulfide, and heavy metals—while preserving essential minerals for healthier, better-tasting water. Note: This is not a reverse osmosis system and does not reduce TDS.
• High-Efficiency Ultrafiltration System: The 4-stage ultrafiltration water filter includes a 5-micron PP filter to capture larger particles like sand and dirt; a UF membrane for ultra-fine filtration; KDF/GAC filters for improved control of chemical contaminants such as chlorine by-products, hydrogen sulfide, and heavy metals; and an activated carbon block for final taste polishing.
• Zero Waste, Compact Design: As a tankless under sink water filter, the CUA4-BLK produces no wastewater, requires no storage tank, and fits perfectly under any standard sink—ideal for use as a kitchen sink water filter, water filter for refrigerator, RV water filter, or any compact house water filter application.
• Premium-Grade Components: Includes a lead-free faucet for clean drinking water. All filters, tubing, and water-contact components meet NSF/ANSI standards, ensuring safety and reliability in any home water filtration system.
• Quick Installation & Filter Changes: With push-to-connect fittings, this under sink filter system for drinking water installs in minutes. Twist-on, twist-off cartridges allow tool-free filter replacement. Each filter lasts 6-12 months depending on water source and usage—perfect for a low-maintenance water filter system.