A. Every lot, parcel or piece of land upon which a residential unit will be constructed shall construct, install, or connect to a pressurized irrigation system. In the case of residential subdivision developments, a pressurized irrigation system shall be constructed and installed simultaneously with the domestic water lines, but not in the same trenches. There shall be no cross connections between the domestic water lines and the irrigation lines.
B. All buildings, lots, or parcels of land within a subdivision which are connected to a common landscape sprinkler irrigation system may be permitted to utilize a single connection to the city's domestic water system. Any system which is allowed a single connection shall have a backflow prevention device which is approved by the city. This single or joint use connection shall be limited to providing irrigation water during the time the common landscape irrigation system has no water supply. However, a joint use connection shall not be allowed for any subdivision, building, lot or parcel which is supplied with irrigation water from a groundwater well. If irrigation water is available from another source, city water will not be used for irrigation purposes. The off-on control valve of this joint use connection shall be under the control of the city public works supervisor.
C. Backflow prevention devices shall be installed at any location on the premises or in the system where, in the judgment of the city public works supervisor, the nature and extent of the activities, or the materials stored on the premises, would present an immediate and dangerous hazard to health and/or be deleterious to the quality of the water should a cross connection occur. Even though a cross connection may not exist at any particular time, backflow prevention devices shall be installed under the following circumstances. This list is meant to be illustrative and not exhaustive:
1. Backflow prevention devices shall be installed on premises having an auxiliary water supply.
2. Backflow prevention devices shall be installed on premises having internal cross connections that are not correctable, or intricate plumbing arrangements which make it impractical to ascertain whether or not cross connections exist.
3. Backflow prevention devices shall be installed on premises where entry is restricted so that inspections for cross connections cannot be made with sufficient frequency or at sufficiently short notice to assure that cross connections do not exist.
4. Backflow prevention devices shall be installed on premises having a repeated history of cross connections being established or reestablished.
5. Backflow prevention devices shall be installed on premises on which any substance is handled under pressure so as to permit entry into the public water supply, or where a cross connection could reasonably be expected to occur. This shall include the handling of process waters and cooling waters.
6. Backflow prevention devices required by this section shall be installed at the meter, at the property line of the premises when meters are not used, or at a location approved by the city public works supervisor. The device shall be located where it is readily accessible for maintenance and testing and where no part of the device will be submerged.
7. Backflow prevention devices required by this section shall be installed under the supervision of and with the approval of the city public works supervisor.
8. Any protective device required by this section shall be of a model approved by the city public works supervisor. A device shall include a double check valve assembly or a reduced pressure valve. A principal backflow prevention device will be approved if it has successfully passed performance tests of the state of Idaho or other testing laboratories satisfactory to the state of Idaho and the city public works supervisor. These devices shall be furnished and installed by and at the expense of the customer.
9. Backflow prevention devices installed pursuant to this section shall be inspected and tested annually, or more often if necessary. Inspections, tests and maintenance shall be at the customer's expense. Whenever the devices are found to be defective, they shall be repaired, overhauled or replaced at the customer's expense. Inspections, tests, repairs, and records thereof shall be accomplished under the city's supervision by certified testers.
10. No underground sprinkling device shall be installed without adequate backflow prevention devices at the point from which the water for irrigation is taken from the public water supply.
11. Failure of the customer to cooperate in the installation, maintenance, testing or inspection of backflow prevention devices required by this section shall be grounds for terminating water service to the premises or, in the alternative, the installation of an air gap separation at the customer's expense.
D. Any violation of this section shall be a misdemeanor punishable in accordance with the misdemeanor statutes of the state of Idaho. (Ord. 424, 4-10-2007)