If the water inlet for a pedicure chair is below the flush level rim, it is treated as which hazard level?

If the water inlet for a pedicure chair is below the flush level rim, it is treated as which hazard level?

• A. Low hazard
• B. Medium hazard
• C. Not hazardous
• D. High hazard

Answer: (D)

At the heart of this is backflow risk from a cross-connection. When the water inlet for the pedicure spa is below the flush level rim, there isn’t a reliable air gap to prevent water from the basin from flowing back into the potable supply. If supply pressure drops or the basin becomes contaminated, water can be siphoned back into the drinking-water lines, creating a direct contamination path. Because this setup allows contaminated water to backflow into the potable system, it’s classified as high hazard. To prevent this, a high-hazard backflow prevention method is required, such as a reduced pressure principle backflow preventer or another approved device, with appropriate testing and maintenance.

At the heart of this is backflow risk from a cross-connection. When the water inlet for the pedicure spa is below the flush level rim, there isn’t a reliable air gap to prevent water from the basin from flowing back into the potable supply. If supply pressure drops or the basin becomes contaminated, water can be siphoned back into the drinking-water lines, creating a direct contamination path. Because this setup allows contaminated water to backflow into the potable system, it’s classified as high hazard. To prevent this, a high-hazard backflow prevention method is required, such as a reduced pressure principle backflow preventer or another approved device, with appropriate testing and maintenance.