The over-pressurization of foam concentrate pumps must not exceed what?

The over-pressurization of foam concentrate pumps must not exceed what?

• A. The working pressure of the foam concentrate piping system.
• B. Twice the working pressure.
• C. The maximum water pressure.
• D. The system discharge pressure.

Answer: (A)

Foam concentrate piping is designed to carry concentrate at a specific working pressure, and the pump delivering the concentrate must stay within that limit. Exceeding the foam piping’s rated working pressure risks rupturing joints, leaks, and improper foam proportioning, which can compromise the system’s effectiveness and safety. The other options point to pressures on the water side or to an undefined multiplier, which do not define the allowable limit for the concentrate piping. Since the concentrate system has its own pressure rating, the over-pressurization must not exceed that working pressure.

Foam concentrate piping is designed to carry concentrate at a specific working pressure, and the pump delivering the concentrate must stay within that limit. Exceeding the foam piping’s rated working pressure risks rupturing joints, leaks, and improper foam proportioning, which can compromise the system’s effectiveness and safety. The other options point to pressures on the water side or to an undefined multiplier, which do not define the allowable limit for the concentrate piping. Since the concentrate system has its own pressure rating, the over-pressurization must not exceed that working pressure.