ProFlex CSST

Gas Pipe Fittings & Tubing

501 IN-341
47949 Hillsboro
United States

Pro-Flex® CSST (Corrugated Stainless Steel Tubing) offers a reliable, flexible, and labor-saving solution for natural gas and propane piping. Acquired in 2014 by the ownership of Sioux Chief Manufacturing, Pro-Flex is based in Hillsboro, Indiana, and has been serving the plumbing, HVAC, and gas piping industries for over two decades. Known for its quality and performance, the Pro-Flex CSST system continues to be a trusted name in both residential and commercial gas installations.



Unlike traditional black steel pipe systems that require time-consuming cutting, threading, and the use of numerous fittings, Pro-Flex CSST significantly reduces installation time and complexity. Its flexible design allows for fewer fittings and easier routing through walls and around obstacles, resulting in up to 75% savings in labor. This efficiency makes it an ideal choice for both new construction and retrofit projects.



Pro-Flex CSST is made from durable stainless steel, ensuring long-lasting performance and resistance to corrosion. The system is engineered to deliver safe and consistent gas flow, whether used for natural gas or propane. Additionally, it is often preferred over alternatives like polyethylene gas pipe, especially in applications where ease of installation and long-term reliability are priorities.



The Pro-Flex® Advantage: Leak-Free Connection—First Time, Every Time



At the core of the Pro-Flex system is its highly reliable fitting technology. Designed for simplicity and leak prevention, the Pro-Flex® fitting system offers secure, worry-free connections with minimal tools and effort. HVAC professionals, plumbers, and commercial installers consistently turn to Pro-Flex for its proven performance in demanding environments.



With a strong commitment to quality, safety, and ease of use, Pro-Flex® CSST continues to set the standard for flexible gas piping solutions.

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