Today on Boiler University's Weekly Boiler Tips, watch as Jude explains what the pump recirculation lines are and the how important they are to their operation. Weekly Boiler Tips are compiled by the knowledgeable and remarkably prolific content creators at WARE, a family owned, third-generation, 69-year-old commercial and industrial boiler rental and service firm based in Louisville KY. You can learn all about this and more at WARE's Boiler University.