The Little Giant 566612 1/28 HP Direct Drive Circulating Pump is a compact pump designed to circulate water through compatible HVAC hydronic systems. Its direct-drive motor powers the impeller, moving water continuously through piping to maintain consistent flow and heat distribution. Commonly used in boilers, radiant heating systems, and other hydronic applications, it supports effic... https://www.partshnc.com/little-giant-566612-1-28hp-direct-drive-circulating-pump