A _______ is used to relieve pressure after the discharge valve has been closed?

• A. Bleeder valve
• B. Relief valve
• C. Check valve
• D. Gate valve

Answer: (A)

Relieving any trapped pressure after a discharge valve is closed is done with a bleeder valve. This small valve allows you to vent off the residual pressure in the line, or release small amounts of fluid and air, so the system can be depressurized safely before maintenance or further work. It provides a controlled, manual depressurization path that isn’t intended for ongoing protection or flow control.

A relief valve, by contrast, is an automatic safety device that opens to protect the system if pressure gets too high, not for deliberate depressurization after a valve is closed. A check valve prevents backflow, not pressure relief. A gate valve is used to start or stop flow by fully or partially closing the path, not to vent pressure.