What is the minimum gauge pressure that must be exceeded during hydrostatic testing of fire protection systems?

During hydrostatic testing of fire protection systems, it is essential to ensure that the system can hold the water pressure without any leaks or failures. The NFPA 24 standard specifies that the minimum gauge pressure for this testing should be at least 50 psi. This pressure level is designed to test the integrity of the system and to ensure that all components, including pipes and fittings, can withstand operational pressures without risking failure.

Setting the pressure at 50 psi during testing is a critical safety measure. It exceeds the typical operating pressure for many fire protection systems, providing a robust assurance against potential leaks or weaknesses in the system. Moreover, achieving this minimum pressure helps validate the design and installation of the system, ensuring compliance with safety standards and protecting both life and property in case of a fire emergency.