Journeyman Plumber ExamPlumbing Code and RegulationsEasy
A plumbing contractor is preparing to install a new water service line from the public main to a commercial building. The local plumbing code, based on the International Plumbing Code (IPC), specifies that all underground potable water service pipes must maintain a minimum horizontal distance from any building sewer or septic tank. What is this minimum horizontal separation distance?
- A2 feet (0.6 meters)
- B15 feet (4.5 meters)
- C10 feet (3.0 meters)
- D5 feet (1.5 meters)
Show answer & explanationAnswer & explanation
Correct answer: C. 10 feet (3.0 meters)
According to the IPC, underground potable water service pipes must be installed a minimum of 10 feet horizontally from any building sewer or septic tank to prevent contamination in case of a leak.
Why the other options are wrong
- A. 2 feet is typically the minimum separation for water lines from other non-sewer utilities.
- B. 15 feet is an unnecessarily large separation distance, exceeding code requirements.
- D. 5 feet is insufficient for protecting potable water from sewage.
Potable Water Line Separation
The minimum required distance between potable water lines and potential sources of contamination, such as sewers or septic tanks, to protect public health.
- Prevents contamination of drinking water.
- Horizontal and vertical separation requirements exist.
- Specific distances are mandated by plumbing codes (e.g., IPC, UPC).
Memory trick: Ten Feet Keeps Water Clean and Neat!