Editing Standpipe (firefighting) (section)

==Standpipe classes==
Under NFPA 14, standpipes designs are classified as Class I, II, or III based on intended user, size of hose connections and design pressure.<ref name="ifsta 2011">{{cite book |last1=Fortney |first1=Jeff |last2=Clausing |first2=Clint |last3=Burnside |first3=Elkie Burnside |last4=Powell |first4=Pam |title=Fire And Emergency Services Orientation and Terminology |date=February 2011 |publisher=International Fire Service Training Association |isbn=9780879394035 |pages=245-248 |edition=5th |chapter=7 - Fire Detection, Alarm, and Suppression Systems}}</ref><ref name="nfpa 14">{{cite web |last1=National Fire Protection Association (NFPA) |author1-link=National Fire Protection Association |title=NFPA 14 (2024) - Standard for the Installation of Standpipe and Hose Systems |url=https://www.nfpa.org/codes-and-standards/nfpa-14-standard-development/14 |website=nfpa.org |publisher=National Fire Protection Association |access-date=23 April 2025 |date=2024|url-access=registration}}</ref>
===Class I===
Class I standpipe systems are intended for use by firefighters, and consists of {{convert|2.5|in|mm}} hose connections to accommodate the fire hoses used by fire departments.
Class I systems must be constructed with {{convert|4|in|mm}} pipe, and at least {{convert|6|in|mm}} in buildings with fire sprinkler systems to ensure adequate water supply during usage, and water pressure at the hose connection must be between {{convert|100|-|175|psi|bar|abbr=on}}.<ref name="nfpa 14"/>

===Class II===
Class II systems are intended for use by building occupants, such as employees, residents or members of the public, and include a hose station containing a {{convert|1.5|in|mm}} fire hose and nozzle pre-connected to the standpipe.<ref name="nfpa 14"/> Class II systems have become less common in recent years, but are still found in buildings.<ref name="ifsta 2011"/>
{{convert|1.5|in|mm}} hose no longer than {{convert|100|ft|m}} must be installed and ready for firefighting usage in Class II systems.<ref name="nfpa 14"/>

Class II systems are required to be 'wet', except in regions subject to freezing temperatures and on-site personnel, such as an industrial fire brigade, are trained how to activate the system without assistance from the local fire department.<ref name="nfpa 14"/> Pipes supplying hose stations on Class II systems do not have a specified size, and must be calculated based on the needs of the specific system. Water pressure at hose connections must be between {{convert|65|-|100|psi|bar|abbr=on}}.<ref name="nfpa 14"/>

===Class III===
Class III systems are designed to include both Class I and Class II: An occupant operated {{convert|1.5|in|mm}} fire hose and {{convert|2.5|in|mm}} hose connections for firefighters. The system must be able to operate both the occupant hose and a firefighter's hose simultaneously, and comply with the design standards for both systems.<ref name="ifsta 2011"/><ref name="nfpa 14"/>