Today on Weekly Boiler Tips, learn about the types of sight glasses used in boilers, their maintenance needs, and durable options for high-pressure systems. Find out how to extend the life of your sight glass with minimal upkeep. 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.