Current through Register Vol. XLI, No. 50, December 13, 2024
Section 64-15-6 - Type of Protection and Circumstances When Protection Is Required6.1. The type of protection required under this rule depends on the degree of hazard that exists or may exist, as determined by the Commissioner, or his or her designee, and shall involve the installation of: 6.1.1. An approved air gap separation when the Commissioner, or his or her designee, determines that contamination with substances could cause a severe health hazard;6.1.2. An approved air gap separation or approved reduced pressure principle backflow prevention assembly when the Commissioner, or his or her designee, determines that contamination with substances could cause a health hazard; or6.1.3. An approved double-check valve assembly, approved reduced pressure principle backflow prevention assembly, or an approved air gap separation when the Commissioner, or his or her designee, determines that contamination with substances could degrade the water quality of the public water system.6.2. When the Commissioner, or his or her designee, does not approve any point of connection between a public water system and an auxiliary water supply, the water customer shall install an approved air gap separation or an approved interchangeable connection with a reduced backflow prevention assembly.6.3. When a water customer installs a booster pump on the premises served by a public water system, or on the service line to the premises, the customer shall install a check valve on the discharge and a low-suction pressure cut-off controller designed to shut off the booster pump when the pressure in the service line on the suction side of the pump drops to 20 pounds per square inch gauge or less.6.4. On premises where backflow prevention assemblies are required by this rule, and the public interest requires continuous uninterrupted service, the water customer shall install two approved backflow prevention assemblies in parallel and shall properly valve them to permit continuous operation, or service to the premises shall be from two separate water service lines each protected by an approved backflow prevention assembly.6.5. Water customers that are open to the public shall be required to install internal backflow prevention methods as part of the public water system's approved backflow prevention program in section 8 of this rule.