18-29-608.12 Pumps and other appliances.

   Water pumps, filters, softeners, tanks and all other devices that handle or treat potable water shall be protected against contamination.

18-29-608.13 Backflow protection.

   Means of protection against backflow shall be provided in accordance with Sections 18-29-608.13.1 through 18-29-608.13.6.

18-29-608.13.1 Air gap.

   The minimum required air gap shall be measured vertically from the lowest end of a potable water outlet to the flood level rim of the fixture or receptacle into which such potable water outlet discharges.

18-29-608.13.2 Reduced pressure principle backflow preventers.

   Reduced pressure principle backflow preventers shall conform to ASSE 1013, AWWA C511 or CSA CAN/CSA B64.4. These devices shall be permitted to be installed in areas subject to continuous pressure conditions. The relief opening shall discharge by air gap and shall be prevented from being submerged.

18-29-608.13.3 Backflow preventer with intermediate atmospheric vent.

   Backflow preventers with intermediate atmospheric vents shall conform to ASSE 1012 or CSA CAN/CSA B64.3. These devices shall be permitted to be installed in areas subject to continuous pressure conditions. The relief opening shall discharge by air gap and shall be prevented from being submerged.

18-29-608.13.4 Barometric loop.

   Barometric loops shall precede the point of connection and shall extend vertically to a height of 35 feet (10.67 m). A barometric loop shall only be utilized as an atmospheric-type or pressure-type vacuum breaker.