Which standpipe class has a riser that feeds the sprinkler system?

Which standpipe class has a riser that feeds the sprinkler system?

• A. Class IV Standpipe.
• B. Class I Standpipe.
• C. Class II Standpipe.
• D. Class III Standpipe.

Answer: (A)

A standpipe class is defined by how it delivers water and who it serves, with one class specifically designed to feed the building’s sprinkler system. In this class, the standpipe riser is tied into the sprinkler system so water can supply both the standpipe and the sprinklers. That makes Class IV the correct choice. Class I and Class II are focused on firefighter use and occupant use, respectively, with no direct sprinkler-feed through the standpipe. Class III combines 2.5-inch standpipe outlets with 1.5-inch hose outlets but still isn’t defined by feeding the sprinkler system through the riser in the same way Class IV does.

A standpipe class is defined by how it delivers water and who it serves, with one class specifically designed to feed the building’s sprinkler system. In this class, the standpipe riser is tied into the sprinkler system so water can supply both the standpipe and the sprinklers. That makes Class IV the correct choice.

Class I and Class II are focused on firefighter use and occupant use, respectively, with no direct sprinkler-feed through the standpipe. Class III combines 2.5-inch standpipe outlets with 1.5-inch hose outlets but still isn’t defined by feeding the sprinkler system through the riser in the same way Class IV does.