What should happen if repairs are made after the initial pressure test?

When repairs are made to a system after the initial pressure test, only the affected piping must be retested to ensure its integrity and safety. This approach is rooted in practical safety measures and regulatory standards which recognize that not all components of a system are impacted by every repair.

Retesting only the affected areas saves time and resources while ensuring compliance with safety protocols. The underlying principle is to verify that any modifications do not compromise the performance or safety of the system, focusing on the portions of the system directly involved with the repair work. This targeted testing approach reassures that insufficient pressure or leaks do not develop in isolated areas of the piping that were not involved in the repairs.

In contrast, requiring the entire system to be retested would be inefficient and unnecessary if only minor repairs were enacted, and stating that minor repairs do not need retesting could overlook crucial safety checks. Similarly, all new connections being subject to a fire safety check, while important in general practice, does not specifically address the implications of repairs on existing systems. Thus, retesting only the affected piping is the correct response to ensuring continued safety and integrity of the overall system after modifications have been made.