Cross mains are used to service what in a sprinkler system?

Cross mains are used to service what in a sprinkler system?

• A. They provide the service to a number of branch lines on which sprinklers are installed
• B. They hold backflow preventers
• C. They connect to the main water supply only
• D. They store spare sprinkler heads

Answer: (A)

Cross mains serve as the distribution network that carries water from the main supply to multiple branch lines where sprinkler heads are installed. This layout lets a single feed serve many sprinklers across different areas, ensuring adequate flow and pressure along all connected branch lines. The other statements don’t fit: backflow preventers are separate devices to prevent contamination, not a function of the cross mains; cross mains aren’t only connected to the main supply but extend out to branch lines; and they don’t store spare sprinkler heads, which are kept in a cabinet or designated storage area.

Cross mains serve as the distribution network that carries water from the main supply to multiple branch lines where sprinkler heads are installed. This layout lets a single feed serve many sprinklers across different areas, ensuring adequate flow and pressure along all connected branch lines. The other statements don’t fit: backflow preventers are separate devices to prevent contamination, not a function of the cross mains; cross mains aren’t only connected to the main supply but extend out to branch lines; and they don’t store spare sprinkler heads, which are kept in a cabinet or designated storage area.