CSLB C-46 Solar ContractorElectrical and Plumbing CodesEasy
A solar contractor is installing a new solar thermal system on a commercial building. The system includes a closed-loop, non-potable heat transfer fluid. According to the California Plumbing Code (CPC), what is the minimum required separation distance between the non-potable fluid piping and any potable water piping?
- A1 inch
- B3 inches
- C2 inches
- D4 inches
Show answer & explanationAnswer & explanation
Correct answer: A. 1 inch
The California Plumbing Code (CPC) specifies a minimum separation distance of 1 inch between piping containing non-potable fluid and piping containing potable water to prevent cross-contamination.
Why the other options are wrong
- B. 3 inches is not the specified minimum separation distance for this scenario.
- C. 2 inches is a common separation for other types of piping, but not specifically for non-potable/potable separation.
- D. 4 inches is not the specified minimum separation distance for this scenario.
CPC Non-Potable/Potable Separation
The minimum distance required by the California Plumbing Code between piping carrying non-potable fluid and piping carrying potable water.
- Applies to solar thermal systems with non-potable fluids.
- Prevents cross-contamination.
- Ensures public health and safety.
Memory trick: Clean water needs a little space to stay safe.