For a safe installation, gas piping must be how far from the appliance when using shutoff valves?

For a safe installation, it is crucial that gas piping is positioned no more than 3 feet from the appliance when using shutoff valves. This distance ensures that the shutoff valve is easily accessible in case of an emergency, allowing for a quick disconnection of gas supply to the appliance.

Having the shutoff valve within this range facilitates prompt action during a malfunction or gas leak, which is vital for ensuring safety in residential and commercial settings. Furthermore, the proximity helps in maintaining the integrity of connections, reducing the risk of leaks due to extended piping runs.

While the other distances might seem appropriate, they do not adhere to the safety guidelines established by industry codes or best practices. For instance, being too far from the appliance could make it inconvenient or unsafe to access the shutoff valve quickly in an emergency. Thus, the specification of a maximum of 3 feet ensures not only safety but also practical usability for maintenance and emergency situations.