A class 1 standpipe shall provide _______ hose connections to supply water for use by fire departments and those trained in the handling heavy fire streams

A class 1 standpipe shall provide _______ hose connections to supply water for use by fire departments and those trained in the handling heavy fire streams

• A. 1 1/2 inches
• B. 3 inches
• C. 2 1/2 inches
• D. 2 inches

Answer: (C)

Standpipes intended for fire department use are built to deliver high water flow with larger hoses. For Class I, the outlets are 2-1/2 inch hose connections, which match the standard large-diameter hoses and pumping capabilities used in heavy-stream operations. This sizing ensures the required flow and compatibility with typical standpipe layouts. Smaller outlets (1-1/2 inch) are for occupants with light handlines, while 3 inch or 2 inch outlets are not the standard for Class I. Therefore, the correct outlet size is 2-1/2 inches.

Standpipes intended for fire department use are built to deliver high water flow with larger hoses. For Class I, the outlets are 2-1/2 inch hose connections, which match the standard large-diameter hoses and pumping capabilities used in heavy-stream operations. This sizing ensures the required flow and compatibility with typical standpipe layouts. Smaller outlets (1-1/2 inch) are for occupants with light handlines, while 3 inch or 2 inch outlets are not the standard for Class I. Therefore, the correct outlet size is 2-1/2 inches.