The vertical piping to which the one-way check valve, alarm valve, and main drain are attached is called what?

The vertical piping to which the one-way check valve, alarm valve, and main drain are attached is called what?

• A. Standpipe
• B. Cross mains
• C. Feed main
• D. Riser

Answer: (D)

Risers are the vertical runs in a fire protection system that carry water upward to sprinklers or hose outlets on different levels. The one-way check valve, alarm valve, and main drain are all mounted on this vertical pipe, which serves as the spine of the standpipe system. The term standpipe refers to the entire system, including horizontal feed mains and hose outlets, while the vertical portion itself is specifically called the riser. That's why the vertical piping in question is identified as a riser.

Risers are the vertical runs in a fire protection system that carry water upward to sprinklers or hose outlets on different levels. The one-way check valve, alarm valve, and main drain are all mounted on this vertical pipe, which serves as the spine of the standpipe system. The term standpipe refers to the entire system, including horizontal feed mains and hose outlets, while the vertical portion itself is specifically called the riser. That's why the vertical piping in question is identified as a riser.