This is a tool, either in physical form or software, utilized to determine the available water flow from a fire hydrant. It estimates the volume of water that can be supplied at a specific location, expressed typically in gallons per minute (GPM), by measuring the pressure drop between a static hydrant and a flowing hydrant. This calculation provides essential data for fire suppression planning and water system evaluation.
Understanding the available water supply is crucial for effective firefighting operations. Knowing the flow rate assists in determining the appropriate firefighting tactics, selecting the correct equipment, and ensuring adequate water pressure to combat potential fires effectively. Historically, these calculations were performed manually using complex formulas. Modern tools offer simplified calculations and improved accuracy. Data derived from these tests is used to evaluate the performance of the municipal water system and to identify areas where improvements are needed to meet fire protection demands.
