Which statement is true about pressure-relieving valves?

Which statement is true about pressure-relieving valves?

• A. They relieve pressure for outlets that may see outlet PSI greater than 100
• B. They measure water temperature
• C. They increase system pressure constantly
• D. They filter impurities

Answer: (A)

Pressure-relieving valves automatically vent the fluid when system pressure reaches a preset limit, preventing overpressure and protecting pipes, pumps, and downstream components. They open to release excess pressure rather than measuring temperature, increasing pressure, or filtering impurities. In many setups, outlets can see pressures above safe levels, so a relief valve is set to a limit (such as around 100 psi) to open and relieve the excess, keeping the system within safe operating bounds. The exact setpoint depends on the system design.

Pressure-relieving valves automatically vent the fluid when system pressure reaches a preset limit, preventing overpressure and protecting pipes, pumps, and downstream components. They open to release excess pressure rather than measuring temperature, increasing pressure, or filtering impurities. In many setups, outlets can see pressures above safe levels, so a relief valve is set to a limit (such as around 100 psi) to open and relieve the excess, keeping the system within safe operating bounds. The exact setpoint depends on the system design.