A Class I standpipe system must be able to flow gallons per minute for a minimum of seconds.

500;30

Explanation:

Standpipe systems are commonly used in fire service departments and it consists of different pipes which help in connecting the hose to a water source

There are three types of standpipe systems namely: Class I which uses a 2.5-inch fire hose, Class II which uses 1.5 inch fire hose and Class III which uses a combination of the Class I and Class II.

A Class I standpipe system must be able to flow 500 gallons per minute for a minimum of 30 seconds.

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all of them lol cause theres no map