Most People Fail This Plumbing Quiz — Can You Pass?

Which valve automatically prevents reverse water flow?

60%

Correct!

Incorrect!

Check valves allow water to flow in only one direction, preventing backflow into pipes. Many people assume a regular valve can stop backflow, but only a check valve performs this function reliably. Proper installation is key to keeping systems safe.

Which valve automatically prevents reverse water flow?

Gate valve

Check valve

Ball valve

Globe valve

60%