Greenpipe and Climatherm product lines now include large diameter pipes. These new sizes are ideal for water mains, high-rise buildings, district energy systems and large chilled water systems. Designed for HVAC applications, the Climatherm SDR 17.6 is now available in sizes ranging from 6 to 24 in., while Greenpipe is available in SDR 11 from ½ to 18 in.