Zurn PEX Performa Radiant Heat Barrier Tubing is 30% more flexible than other barrier tubing products, making it easier to handle and less time-consuming to install, the company says. It has an ...

Although it’s less flexible than type A, PEX type B offers a good balance between stiffness and flexibility. Kinks are fixable with type A, but working them out with a heat gun is a pain.