What type of water based fire protection system will have the proportioning valve?

What type of water based fire protection system will have the proportioning valve?

• A. Deluge
• B. Wet-Pipe
• C. Foam
• D. Dry-Pipe

Answer: (C)

Foam systems include a foam concentrate that must be mixed with water to form a foam solution. To ensure the concentrate is added at the correct proportion, these systems use a proportioning valve (proportioner) to meter the concentrate into the water supply. Other common water-based systems—deluge, wet-pipe, and dry-pipe—carry only water in the pipes and do not require mixing additives, so they do not include a proportioning valve.

Foam systems include a foam concentrate that must be mixed with water to form a foam solution. To ensure the concentrate is added at the correct proportion, these systems use a proportioning valve (proportioner) to meter the concentrate into the water supply. Other common water-based systems—deluge, wet-pipe, and dry-pipe—carry only water in the pipes and do not require mixing additives, so they do not include a proportioning valve.