Today on Weekly Boiler Tips, Jude talks about a common misconception that you can interchange a head for a McDonnell Miller 150 and 93/94 Head. Safety notice: Always consult experts for complex repairs. 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.