What must not be twisted or kinked during installation?

During the installation of underground storage tanks (USTs), it is crucial that flexible connectors are not twisted or kinked. Flexible connectors are designed to accommodate movement, thermal expansion, and vibrations without compromising their integrity. If they are twisted or kinked, it can lead to stress concentrations, which may result in cracks or leaks. This is critical because any leaks can pose significant environmental hazards and regulatory compliance issues, as well as potentially compromising the operation of the UST system.

While other elements like back-fill materials, protective covers, and compacted bedding are important to the installation process, they do not directly rely on being free of twists or kinks for their purpose. Back-fill materials provide structural support, protective covers serve to shield the tank from physical damage or environmental conditions, and compacted bedding creates a stable base for the tank; however, their installation does not involve the same risk factors associated with flexible connectors. Therefore, ensuring that flexible connectors remain straight and unimpeded is a vital aspect of UST installation.