What standard do Class 4 septic tanks and Class 5 holding tanks both conform to?

What standard do Class 4 septic tanks and Class 5 holding tanks both conform to?

• A. CAN3-B66 (CSA)
• B. UL 1743
• C. NFPA 13
• D. ISO 9001

Answer: (A)

Underground wastewater tanks are designed to be buried and endure soil pressure and long-term exposure, so they’re built to a specific Canadian standard that covers prefabricated septic and holding tanks. This standard, CAN/CSA-B66, sets the requirements for design, construction, testing, labeling, and performance of these underground wastewater containers. Because both Class 4 septic tanks and Class 5 holding tanks serve the same practical purpose—holding or treating wastewater underground—they conform to this standard to ensure they’re sturdy, watertight, and suitable for long-term underground use. The other standards don’t fit this application: UL 1743 relates to electrical equipment, NFPA 13 covers fire sprinkler systems, and ISO 9001 is about quality management systems, not the specific product requirements for septic and holding tanks.

Underground wastewater tanks are designed to be buried and endure soil pressure and long-term exposure, so they’re built to a specific Canadian standard that covers prefabricated septic and holding tanks. This standard, CAN/CSA-B66, sets the requirements for design, construction, testing, labeling, and performance of these underground wastewater containers. Because both Class 4 septic tanks and Class 5 holding tanks serve the same practical purpose—holding or treating wastewater underground—they conform to this standard to ensure they’re sturdy, watertight, and suitable for long-term underground use.

The other standards don’t fit this application: UL 1743 relates to electrical equipment, NFPA 13 covers fire sprinkler systems, and ISO 9001 is about quality management systems, not the specific product requirements for septic and holding tanks.