ISOTECH® IEJ-CS-Weld Externally Pressurized Expansion Compensator Designed to seamlessly integrate with HVAC piping systems, the IEJ-CS Expansion Compensator series allows for axial expansion and contraction, protecting pipes from stress and damage. Equipped with durable bellows, these expansion joints ensure flexibility and reliability in diverse applications. Available in copper, carbon steel, and stainless steel, they come with a range of connection types and diameters to suit project-specific needs. With pressure ratings of 150, 200, and 300 PSI, ISOTECH’s IEJ-CS joints provide superior performance for HVAC systems, ensuring long-term operational efficiency.