Which material is not approved for a temporary emergency waterline?

• A. PVC
• B. Polyethylene
• C. Rubber Hoses
• D. Steel

Answer: (C)

For a temporary emergency waterline, the material used must be approved for potable water and capable of withstanding the expected pressures while allowing proper disinfection. Rubber hoses don’t fit this requirement because they’re not designed for potable-water distribution as a long-term or even reliable temporary solution. They’re flexible, not rated for sustained pressures, prone to cracking and leaks, and their fittings aren’t compatible with standard distribution joints. They also present challenges for effective disinfection and contamination control.

In contrast, materials like PVC, polyethylene, and steel are manufactured and rated for potable water use, come with known pressure ratings, are easier to disinfect, and can be installed with proper joints and restraints. They provide a safer, more durable, and code-compliant option for temporary emergency installations.