Which feature can trigger the high hazard classification for a pedicure chair water inlet?

• A. Spray hose
• B. High pressure
• C. Large diameter piping
• D. High temperature

Answer: (A)

The key idea is how the water inlet can contaminate the potable supply through backflow and aerosolization. A spray hose on a pedicure chair can produce fine droplets and splashes, which increases the chance that contaminants from the basin or non-potable fluids could be drawn back into the water system or spread into the surrounding area. That potential for introducing contamination makes the inlet a high-hazard feature.

The other features don’t inherently create that same backflow and aerosol risk. High pressure, large-diameter piping, or high temperature may require special controls or materials, but they don’t by themselves elevate the hazard classification in the same way a spray nozzle does.