Dental Units

Section 890.745  Dental Units a)         A reduced pressure principle backflow preventer assembly conforming to ASSE 1013, or a fixed air gap, shall be installed on each dental unit or group of dental units. b)         Dental vacuum systems connected to the water supply shall be provided with backflow protection. c)         If a dental unit has a water outlet below the flood rim level of a cuspidor, then an approved reduced pressure principle backflow preventer assembly, a fixed air gap, an air vent hole on the outlet, or an approved vacuum breaker shall protect the water supply from each dental unit.