Sprinkler System Requirements Flashcards

What is the maximum distance allowed between sprinkler heads in a light hazard occupancy under NFPA 13?

Answer: 15 feet

NFPA 13 allows a maximum of 15 feet between sprinkler heads in light hazard occupancies.

Which type of sprinkler system uses air pressure to hold water back from the piping until a head activates?

Answer: Dry pipe system

A dry pipe system uses pressurized air or nitrogen to keep the valve closed until a sprinkler opens, allowing water to flow.

According to NFPA 13, what minimum clearance must be maintained between the top of storage and sprinkler deflectors?

Answer: 18 inches

NFPA 13 requires at least 18 inches of clearance between the top of storage and sprinkler deflectors to ensure proper water distribution.

A sprinkler system inspector tag is required to be posted at which location?

Answer: At the main riser or control valve

NFPA 25 requires inspection tags to be posted at the main riser or control valve where they are easily visible.

What is the purpose of a fire department connection (FDC) on a sprinkler system?

Answer: To supplement the water supply from a fire truck

The FDC allows fire department pumpers to augment the water supply feeding the sprinkler system during a fire.

Under NFPA 25, how often must gauges on a wet pipe sprinkler system be inspected?

Answer: Monthly

NFPA 25 requires gauges on wet pipe sprinkler systems to be inspected monthly to verify proper system pressure.

Which sprinkler head orientation is required when the deflector must be positioned within 1 to 12 inches below the ceiling?

Answer: Pendant

Pendant sprinklers are installed with the deflector 1 to 12 inches below the ceiling to distribute water in a downward spray pattern.