A water service and sewer cross within a congested trench. Which separation or protection rules govern the layout?
- AUse paint color as the only protection
- BLet the pipes touch if both are plastic
- Apply the required separation and approved crossing or protective details
- DPlace the water line at the trench bottom for the described plumbing system and documented site conditions
Why C is correct
The best answer is: Apply the required separation and approved crossing or protective details. Separation and crossing requirements reduce the chance that sewage contamination reaches potable piping during leakage or repair. Pipe material or color alone does not manage that public-health hazard. The transferred field condition applies the same plumbing design, installation, service, or safety principle to a different project setting. The alternatives omit a prerequisite, conflict with the approved method, or fail to control the stated sanitation or physical hazard.