Are manual wet standpipes that are part of a combined sprinkler system required to be hydrostatically tested every 5 years?

Manual wet standpipes that are part of a combined sprinkler system are not required to undergo hydrostatic testing every five years. This requirement aligns with the guidelines established in relevant codes and standards, such as NFPA 25, which governs the inspection, testing, and maintenance of water-based fire protection systems.

The hydrostatic testing of standpipes is generally mandated for specific circumstances, such as when they are newly installed or have undergone significant alterations. The five-year testing period typically applies to dry standpipes and certain other components but does not extend to manual wet standpipes in combined systems unless stated otherwise by local regulations or standards.

Understanding the specific requirements for various components of fire protection systems, including their maintenance and testing intervals, is crucial for ensuring compliance with safety regulations and maintaining the operational readiness of the system. In this context, the answer reflects the ongoing practice of evaluating the testing requirements based on the type and condition of the standpipe system involved.