During inspection of main relief valves and circulation relief valves, damaged or missing components shall be repaired or replaced in accordance with whose instructions?

During inspection of main relief valves and circulation relief valves, damaged or missing components shall be repaired or replaced in accordance with whose instructions?

• A. Owner's instructions
• B. Installers instructions
• C. Manufacturer's instructions
• D. Contractor's instructions

Answer: (C)

The main concept is that safety-critical relief valves must be repaired or replaced using the manufacturer’s instructions. When a main relief valve or circulation relief valve has damaged or missing components, only the manufacturer’s service guidelines specify the exact parts, torque values, seating surfaces, spring settings, and testing procedures needed to restore the valve to its rated performance. Following these instructions preserves the valve’s pressure-relief characteristics, ensures compatibility with the system, and maintains listing and warranty. Using owner, installer, or contractor instructions may lead to incorrect parts or settings, improper sealing, or inadequate relief capacity, which can cause overpressure, leaks, or valve failure.

The main concept is that safety-critical relief valves must be repaired or replaced using the manufacturer’s instructions. When a main relief valve or circulation relief valve has damaged or missing components, only the manufacturer’s service guidelines specify the exact parts, torque values, seating surfaces, spring settings, and testing procedures needed to restore the valve to its rated performance. Following these instructions preserves the valve’s pressure-relief characteristics, ensures compatibility with the system, and maintains listing and warranty. Using owner, installer, or contractor instructions may lead to incorrect parts or settings, improper sealing, or inadequate relief capacity, which can cause overpressure, leaks, or valve failure.