12-3-5: REQUIREMENTS:
A. All properties that are connected to the town's water system, except single-family residential uses without a fire suppression system, shall be subject to a survey for cross-connections.
B. If a cross-connection has been identified, the responsible party shall install an appropriate backflow prevention assembly and/or method at the responsible party's water service connection within one hundred twenty (120) days of its discovery.
C. The responsible party shall ensure that any backflow prevention assembly is installed in the following manner and/or location:
1. Downstream of the water meter or as close to that location as deemed practical by the town.
2. Provides access for maintenance, testing, and repair.
3. Provides adequate drainage from the discharge of water from reduced pressure principle backflow prevention assemblies. Such discharge shall be conveyed in a manner which does not impact the waters of the state.
4. Protected in a manner to prevent freezing. Those assemblies and methods used for seasonal services may be removed in lieu of being protected from freezing; provided, however, that devices must be reinstalled and then tested by a certified cross-connection control technician prior to the service being activated.
5. Does not have connections or tees between the meter and the containment backflow prevention assembly.
6. Provides a pressure controlling device where a backflow prevention assembly or method is installed on a water supply system using storage water heating equipment such that thermal expansion causes an increase in pressure.
7. Reduced pressure principle backflow preventers shall not be subject to flooding.
8. In instances where a reduced pressure principle backflow preventer cannot be installed, the responsible party shall install approved backflow prevention devices or methods at all cross-connections within the responsible party's plumbing system.
D. Existing buildings shall comply with all requirements of this chapter except for fire sprinkler systems where the installation of a backflow prevention assembly or method will comprise the integrity of the fire sprinkler system.
E. For new buildings, all building plans must be submitted to the town's building official for review and approval in accordance with the adopted building codes in title 8, chapter 1, as amended from time to time. In addition to requirements of this section, the plans must show:
1. Water service type, size and location;
2. Meter size and location;
3. Backflow prevention assembly size, type and location; and
4. Fire sprinkler system(s) service line, size, and type of backflow prevention assembly.
a. All fire sprinkling lines shall have a minimum protection of an approved double check valve assembly for containment of the system.
b. All glycol (ethylene or propylene) or antifreeze systems shall have an approved reduced pressure principle backflow preventer for containment.
c. Dry fire systems shall have an approved double check valve assembly installed upstream of the air pressure valve.
d. In cases where the installation of a backflow prevention assembly or method will comprise the integrity of the fire sprinkler system the town will not require the backflow protection. The town will measure chlorine residual at the service connection once a month and perform periodic bacteriological testing at the site. If the town suspects water quality issues, the town will evaluate the practicability of requiring that the fire sprinkler system be flushed periodically. (Ord. 6, Series 2023)