Which of the following is true about the installation of CSST?

The statement regarding the installation of CSST, which stands for Corrugated Stainless Steel Tubing, correctly identifies the need for additional grounding. CSST systems are made of flexible tubing that can be exposed to electrical surges, which can create a risk of damage or fire if not properly grounded. To mitigate this risk, local codes and safety standards often require that CSST systems be grounded to prevent electrical hazards. Grounding provides a safe path for stray electrical currents, reducing the risk of arcing at the connections and ensuring the overall safety of the gas piping system.

In contrast, the other statements are not accurate. CSST is indeed suitable for use in residential applications, providing a lightweight and flexible alternative to traditional steel piping. Although flexible, CSST is designed to withstand various pressures and is generally considered easier to install in tight spaces than rigid steel pipe. Lastly, CSST installations must be protected from physical damage, especially in areas where the tubing may be exposed to potential impacts or abrasion. This protection is typically ensured through the use of protective measures like conduit or rigid materials when installed in vulnerable areas.