Tubing is an essential part of every hydronic radiant heating system. Like veins, it transports warm fluid, and the heat output, throughout your floors, turning them into comfortable, warm surfaces. We offer the best PEX and PERT tubing for our hydronic systems, available in a variety of sizes, ranging from 3/8″ to 1″. These tubes provide excellent performance in radiant applications and provide the system designer with the greatest options for component selection. With five sizes available, how do you know which one is best for your project? These general rules can help.