The Honeywell Home Two-Port Zone Valve is a 28mm valve designed for use with storage tank water heaters, specifically in a heating system with a boiler. It features a metal tank lining, a compact water heater profile, and is compatible with smart home systems. With a manufacturer warranty of 1 year, this corded electric valve operates on 240V and is ideal for indoor mounting. It is energy-efficient with an A rating, making it a reliable choice for managing hot water flow in a heating system. also comes with multifunction valve