What is the maximum recommended pressure in psi for air-pressurized standpipes?

The maximum recommended pressure for air-pressurized standpipes is 25 psi. This pressure is standardized to ensure the efficient operation of the system while maintaining safety. Air-pressurized standpipes are designed to use compressed air to help push water through the system when it is activated, and 25 psi is considered optimal for ensuring that enough force is available to deliver the water effectively without risking damage to the system.

Operating at or below this pressure threshold helps prevent potential failure of the standpipe system and minimizes the risk of leaks or ruptures in the piping that could arise from excessive pressure. Properly managing air pressure is crucial for maintaining reliable and effective fire protection, giving firefighters adequate water flow when needed.