Journeyman Plumber ExamGas PipingEasy
A plumber is installing a new natural gas furnace in a residential basement. The furnace requires a dedicated shutoff valve. According to most plumbing codes, what is the maximum distance allowed between the union or connector and the appliance shutoff valve?
- A36 inches
- B12 inches
- C6 inches
- D24 inches
Show answer & explanationAnswer & explanation
Correct answer: C. 6 inches
Most plumbing and mechanical codes specify a maximum distance of 6 inches between the union or connector and the appliance shutoff valve to ensure easy and quick access for servicing or in case of emergency.
Why the other options are wrong
- A. This distance is excessively far and would make emergency shutoff difficult and unsafe.
- B. This distance is too far for practical and safe accessibility to the shutoff valve.
- D. This distance is significantly too far and would violate common code requirements.
Appliance Shutoff Valve Placement
The gas appliance shutoff valve must be located within a specific, close proximity to the appliance's union or connector for safety and accessibility.
- Required for all gas-burning appliances.
- Must be readily accessible.
- Typically within 6 inches of the union or connector.
Memory trick: Keep the 'Stop' switch close to the 'Fire' machine.