All regulators should be certified and properly sized to provide the required flow across the extremes of inlet pressures.

All regulators should be certified and properly sized to provide the required flow across the extremes of inlet pressures.

• A. False
• B. Partially true; certification is required but sizing is optional.
• C. True only for new installations.
• D. True; regulators must be certified and sized for extremes.

Answer: (D)