What is the maximum allowable distance for a passageway to access a water heater in an attic?

The maximum allowable distance for a passageway to access a water heater in an attic is 20 feet. This requirement is established to ensure that the service personnel can safely and easily access the water heater for maintenance and emergencies. Long and complicated routes can lead to safety risks, such as tripping hazards or insufficient space for carrying tools and equipment required for servicing the heater.

The 20-foot limit promotes accessibility while also considering the structural limitations and the potential hazards of working in confined or elevated spaces like attics. By adhering to this guideline, plumbing code ensures that the installation is both functional and compliant with safety standards, thereby protecting the service personnel and the property.

Access routes longer than this can complicate repair or maintenance work and increase the risks of accidents, which is why 20 feet is considered the maximum allowable distance for effective and safe access.