Hydrostatic testing shall be conducted on which type of system?

Hydrostatic testing shall be conducted on which type of system?

• A. New systems only
• B. Any system that has been modified or repaired
• C. Stand-alone systems
• D. Fire pump systems only

Answer: (B)

Hydrostatic testing is used to verify the pressure integrity and leak-tightness of a piping system after changes. When a system has been modified or repaired, joints, fittings, valves, or sections may have hidden weaknesses that aren’t apparent at normal operating pressure. By filling the system with water and pressurizing it above its normal service pressure for a set period, any leaks or deformities reveal themselves, allowing corrective action before the system is put back into service. This requirement is not limited to new installations or to fire pump systems alone; it applies to any system that has been modified or repaired to ensure safety and reliability.

Hydrostatic testing is used to verify the pressure integrity and leak-tightness of a piping system after changes. When a system has been modified or repaired, joints, fittings, valves, or sections may have hidden weaknesses that aren’t apparent at normal operating pressure. By filling the system with water and pressurizing it above its normal service pressure for a set period, any leaks or deformities reveal themselves, allowing corrective action before the system is put back into service. This requirement is not limited to new installations or to fire pump systems alone; it applies to any system that has been modified or repaired to ensure safety and reliability.