Standard for Installation of Fire Safety Devices based on Use and Occupancy Article 219
The installation of foam based hydrant shall comply with the following subparagraphs:1. The discharging pressure of foam nozzle (head) shall be more than 3.5kg/cm2 or 0.35MPa (inclusive).2. The installation of indoor foam based hydrant shall apply mutais mutandis to the case as referred to in Article 34.1.1 and 35; outdoor foam based hydrant equipped shall apply mutais mutandis to the case as referred to in Article 40.1 and 40.4.