MCC-NH Gas Fitters Practice Exam

When installing CSST, what must be adhered to?

1. Local building codes only

2. Manufacturer's I and O

3. Standard safety practices

4. National building standards

The correct answer is: Manufacturer's I and O

When installing Corrugated Stainless Steel Tubing (CSST), it is crucial to adhere to the manufacturer's installation and operation instructions (I and O). This is because the manufacturer's guidelines provide specific requirements and recommendations that ensure the proper functionality and safety of the CSST system. These guidelines address factors such as the correct installation technique, necessary fittings, pressure testing, and compliance with applicable operational standards. Following the manufacturer’s instructions minimizes the risk of installation errors, potential leaks, or inefficiencies in the gas supply system. As CSST has unique characteristics, such as flexibility and the need for specific grounding requirements, the correct adherence to the manufacturer's specifications is vital for both safety and compliance. While local building codes, standard safety practices, and national building standards are important and should not be overlooked, the manufacturer's instructions are tailored specifically to the product in question, making them the most critical guidelines to follow during installation.