The Taco 0015e3® ECM High-Efficiency Circulator is a variable speed, high-efficiency wet rotor Circulator with an ECM permanent magnet motor. It’s ideal for hydronic systems zoned with Circulators or zone valves or used on potable water systems for domestic water recirculation. With 3 easy settings, the 0015e3® ECM High-Efficiency Circulator delivers performance, reliability and ease of installation that made the 00® famous. Install it, forget it!®