What type of appliance requires a manual shut-off valve in its installation?

A manual shut-off valve is a critical safety feature for many gas appliances, particularly in commercial and industrial settings. These environments often utilize high-capacity gas appliances that require strict safety measures due to the larger volumes of gas being used and the potential risks involved. The manual shut-off valve serves as a precautionary measure, allowing for immediate shut-off in case of an emergency, maintenance, or when the appliance is not in use.

In addition to being necessary for safety, the presence of such valves complies with various regulatory and safety codes governing the installation of gas appliances in commercial and industrial facilities. While residential appliances do have safety mechanisms in place, the need for a manual shut-off valve is particularly emphasized in commercial and industrial contexts due to the scale and complexity of the systems involved.

While it's important for all gas appliances to be installed according to safety standards, the specific requirement for a manual shut-off valve is more rigorously defined for commercial and industrial appliances, which often deal with larger gas flows and associated risks.