Journeyman Plumber ExamWater Supply SystemsEasy
A plumber is installing a new water service line to a single-family dwelling. The local plumbing code specifies a minimum burial depth of 12 inches for water service piping. However, the trench depth available due to existing underground utilities is only 8 inches. What is the most appropriate action the plumber should take?
- AWrap the pipe in insulation to protect it from freezing temperatures.
- BUse a larger diameter pipe to compensate for the reduced burial depth.
- CInstall the pipe at 8 inches and backfill, as it's the best available option.
- DConsult with the local plumbing inspector for an approved alternative or variance.
Show answer & explanationAnswer & explanation
Correct answer: D. Consult with the local plumbing inspector for an approved alternative or variance.
Plumbing codes must be followed. When site conditions prevent compliance, the correct procedure is to seek approval from the local authority, not to proceed with a non-compliant installation or implement unauthorized modifications.
Why the other options are wrong
- A. Insulation might help with freezing but does not address the code requirement for burial depth, which is often for protection from physical damage as well.
- B. Pipe diameter does not compensate for insufficient burial depth; this is irrelevant to the problem.
- C. Installing below code minimums without approval is a code violation and could lead to fines or re-work.
Plumbing Code Compliance
Adherence to local, state, and national regulations governing the design, installation, and maintenance of plumbing systems.
- Codes ensure safety, health, and welfare.
- Deviations require official approval (e.g., variance).
- Ignorance of the code is not an excuse for non-compliance.
Memory trick: When code blocks the way, consult the authority, don't just stray.