Journeyman Plumber ExamPlumbing Code and RegulationsMedium
A plumber is installing a water heater in a residential garage. The local authority, which follows the International Plumbing Code (IPC), requires that water heaters in garages be elevated to prevent ignition of flammable vapors. What is the minimum height from the garage floor to the ignition source of the water heater, as per IPC?
- A24 inches
- B12 inches
- C18 inches
- D6 inches
Show answer & explanationAnswer & explanation
Correct answer: C. 18 inches
The IPC mandates that the ignition source of a water heater in a garage must be elevated a minimum of 18 inches above the garage floor. This is a crucial safety measure to prevent ignition of gasoline or other flammable vapors that may accumulate near the floor.
Why the other options are wrong
- A. 24 inches would meet the requirement, but 18 inches is the minimum, making this option not the 'minimum' required.
- B. 12 inches is insufficient; the standard minimum is higher for this application.
- D. 6 inches is too low and does not meet the safety requirements for flammable vapor ignition.
Water Heater Elevation in Garages
Requirement to raise the ignition source of water heaters in garages above the floor to prevent igniting flammable vapors.
- Applies to fuel-fired water heaters.
- Protects against gasoline and other heavy vapors.
- Specific height mandated by code.
Memory trick: Garage water heater: Eighteen inches high, keeps flames from floor, vapors fly by.