Viqua VT1 Copper Series UV Water Filter System 1gpm - 120 Volt VT Entry level point-of-use UV system for recommended flow rates up to 1 gpm (4 lpm). Small, durable, easy to install, and features an on indicator light. Perfect for a single faucet, water fountain or low-flow application. 120 VAC North American Plug (European models sold separately).