||Backflow Prevention Device/Req
||Backflow prevention Air gap
||restroom, public toilet tank
||I found that the water inlet tube inside the toilet tank extended down below the water level. As discussed, the water inlet tube must remain in place inside the pipe stand. This air gap must always be maintained. Failure to provide an air gap could result in the possible back flow of contaminated water into the water supply. Corrected at the time of inspection. An air gap of at least one inch has been established.