Discharge nozzles shall be made of which materials?

Discharge nozzles shall be made of which materials?

• A. Brass, Stainless Steel
• B. Plastic
• C. Aluminum
• D. Wood

Answer: (A)

Discharge nozzle material is specified to be corrosion-resistant and compatible with the extinguishing agent, so the nozzle remains durable and functional under discharge conditions. Brass and stainless steel meet these needs well; they resist corrosion from the wet chemical agents used in Class K systems and hold up to the pressure and wear of discharge, preserving the correct spray pattern. Plastic, aluminum, and wood don’t fit because plastic can degrade or soften, aluminum may corrode with the agent, and wood is neither durable nor fire-safe for a discharge path.

Discharge nozzle material is specified to be corrosion-resistant and compatible with the extinguishing agent, so the nozzle remains durable and functional under discharge conditions. Brass and stainless steel meet these needs well; they resist corrosion from the wet chemical agents used in Class K systems and hold up to the pressure and wear of discharge, preserving the correct spray pattern. Plastic, aluminum, and wood don’t fit because plastic can degrade or soften, aluminum may corrode with the agent, and wood is neither durable nor fire-safe for a discharge path.