What prevents any solution or water from backing up into the chlorine line?

What prevents any solution or water from backing up into the chlorine line?

• A. Auxiliary valve
• B. Check valve
• C. Release valve
• D. Blow-off valve

Answer: (B)

Backflow prevention in a chlorine line relies on a check valve, a one-way device that allows flow toward the system but automatically closes to stop any reverse flow. If pressure changes or a surge would push liquid back, the check valve seals, preventing any solution or water from backing into the chlorine line and potentially causing contamination or chemical hazards. The other valves aren’t designed to block reverse flow by themselves: an auxiliary valve is an extra control valve, a release valve vents pressure, and a blow-off valve is used for flushing or draining.

Backflow prevention in a chlorine line relies on a check valve, a one-way device that allows flow toward the system but automatically closes to stop any reverse flow. If pressure changes or a surge would push liquid back, the check valve seals, preventing any solution or water from backing into the chlorine line and potentially causing contamination or chemical hazards. The other valves aren’t designed to block reverse flow by themselves: an auxiliary valve is an extra control valve, a release valve vents pressure, and a blow-off valve is used for flushing or draining.