(A) Commercial, industrial and multi-family service connections shall be subject to a survey for cross-connections. If a cross-connection has been identified, an appropriate backflow prevention assembly and/or method shall be installed at the customer’s water service connection within 120 days of its discovery. The assembly shall be installed downstream of the water meter or as close to that location as deemed practical by the public water system. If the assembly or method cannot be installed within 120 days, the town will take action to control or remove the cross-connection, suspend service to the cross-connection or receive an alternative compliance schedule from the State Department of Public Health and Environment.
(B) (1) In no case shall it be permissible to have connections or tees between the meter and the containment backflow prevention assembly.
(2) In instances where a reduced pressure principle backflow preventer cannot be installed, the owner must install approved backflow prevention devices or methods at all cross-connections within the owner’s plumbing system.
(C) Backflow prevention assemblies and methods shall be installed in a location which provides access for maintenance, testing and repair.
(D) Reduced pressure principle backflow preventers shall not be installed in manner subject to flooding.
(E) Provisions shall be made to provide 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 waters of the state.
(F) All assemblies and devices shall be protected to prevent freezing. Those assemblies and methods used for seasonal services may be removed in lieu of being protected from freezing. The devices must be re-installed and then tested by a certified cross-connection control technician prior to the service being activated.
(G) 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, a device for controlling pressure shall be installed.
(H) All backflow prevention assemblies shall be tested at the time of installation and on an annual schedule thereafter. Such tests must be conducted by a certified cross-connection control technician whom is approved and licensed by the town.
(I) The town will require inspection testing, maintenance and, as needed, repairs and replacement of all backflow prevention assemblies and methods, and of all required installations within the owner’s plumbing system in the cases where containment assemblies and or methods cannot be installed.
(J) All costs for design, installation, maintenance, testing and as needed repair and replacement are to be borne by the customer.
(K) No grandfather clauses exist except for fire sprinkler systems where the installation of a backflow prevention assembly or method will compromise the integrity of the fire sprinkler system.
(L) (1) For new buildings, all building plans must be submitted to the town and approved prior to the issuance of water service.
(2) Building plans must show:
(a) Water service type, size and location;
(b) Meter size and location;
(c) Backflow prevention assembly size, type and location; and
(d) Fire sprinkler system(s) service line, size and type of backflow prevention assembly.
1. All fire sprinkling lines shall have a minimum protection of an approved double check valve assembly for containment of the system.
2. All glycol (ethylene or propylene) or antifreeze systems shall have an approved reduced pressure principle backflow preventer for containment.
3. Dry fire systems shall have an approved double check valve assembly installed upstream of the air pressure valve.
4. In cases where the installation of a backflow prevention assembly or method will compromise the integrity of the fire sprinkler system, the public water system will not require the backflow protection. The public water system will measure chlorine residual at the service connection once a month and perform periodic bacteriological testing at the site. If the public water system suspects water quality issues, the public water system will evaluate the practicability of requiring that the fire sprinkler system be flushed periodically.
(Ord. 04-2016, passed 1-13-2016) Penalty, see § 53.99