What alarm is required for pressure system wet wells?

• A. Visual alarm only
• B. Audio alarm only
• C. Visual and audio alarm
• D. No alarm

Answer: (C)

Alarms for pressure system wet wells must provide notice in multiple ways to ensure a quick, reliable response to hazardous conditions. A visual alarm, like a flashing light, makes the warning visible to anyone nearby, even in noisy environments or when attention isn’t focused on the control panel. An audio alarm, such as a siren or horn, guarantees that the warning is heard even if someone isn’t looking at the lights or if visibility is limited—for example at night or in poor weather. Using both together creates redundancy and maximizes the chance that staff will notice and act promptly to conditions like high water levels or pump failures, helping prevent overflows and safety risks. Relying on only one type could miss detections in certain scenarios, and having no alarm would pose a serious safety hazard.