Final answer:
Gas utilization equipment in a residential garage should be located at least 18 inches above the floor to minimize hazards and allow for easier maintenance and inspection.
Step-by-step explanation:
In a residential garage, gas utilization equipment must be located at least 18 inches above the floor. This requirement is to ensure that the equipment is kept away from any potential hazard, such as flammable materials or water leakage.
By placing the equipment at a certain height, it minimizes the risk of damage or ignition in case of a spill or leak. It also allows for easier maintenance and inspection of the equipment.
For example, a gas water heater should typically be mounted at least 18 inches above the floor in a residential garage.