104328 Bell & Gossett 3PH Ecocirc XL 45-375 Iron Body Circulator, 3 HP, 400-460/3/60. The Bell & Gossett ecocirc XL is a highly efficient circulator that enhances commercial hydronics systems with superior quality and dependability. State of the art hydraulics, advanced motor design, intelligent controls, and smart communication capabilities highlight expert engineering across a broad range of HVAC and plumbing applications.