15-23-8 Backflow Prevention Assembly Installation Requirements.
A. Backflow prevention assemblies shall be installed and maintained by the customer, at the customer’s expense and in compliance with the standards and specifications adopted by the Utility, at each service connection. The customer is responsible for notifying the Utility of any installation, repair, relocation or replacement.
B. The backflow prevention assembly shall be installed on private property in an accessible location above ground, as close as possible to the service connection with proper clearances in accordance with the current set of standard details approved by the Utility for backflow prevention assemblies (see Appendix A, on file in the office of the Town Clerk). The backflow prevention assembly shall be installed immediately following the meter and in all cases before the first branch line. The assembly shall have a diameter equal to or greater than the diameter of the service connection. Each service connection will require its own backflow prevention assembly.
C. When a customer requires a continuous water supply, two (2) or more backflow prevention assemblies of the same type shall be installed parallel to one another at the service connection to allow a continuous water supply during testing of each individual backflow prevention assembly. When backflow prevention assemblies are installed parallel to one another, the sum of the cross-sectional area of the assemblies shall be equal to or greater than the cross-sectional area of the service connection or service line piping at the point of installation.
D. For an air gap (AG) installation, all piping installed between the customer’s connection and the receiving tank shall be entirely visible unless otherwise approved in writing by the Utility.
E. A PVB or SVB assembly may be installed for use on a landscape water irrigation service if all of the following criteria are met. In all other circumstances, an RP assembly is required:
1. The water use beyond the assembly is for irrigation purposes only;
2. The PVB/SVB is installed in accordance with manufacturer’s specifications;
3. The irrigation system is designed and constructed to be incapable of inducing backpressure;
4. Chemigation, the injection of chemical pesticides and fertilizers, is not used or provided for in the irrigation system; and
5. No other source of water is available on the premises.
F. No person shall alter, modify, bypass or remove a backflow prevention method without the approval of the Utility.
G. Installation of the backflow prevention assembly must be completed within the time specified by the Utility. A time extension may be granted by the Utility.
H. If a customer fails to install a backflow prevention assembly pursuant to this article, the Utility shall discontinue water service and assess a compliance fee pursuant to this article.
I. If the Utility determines, after inspection of the customer’s system, that a backflow prevention method less restrictive than that required in Section 15-23-6(A) will provide adequate protection of the public water supply, the Utility may, at its sole discretion, modify or waive the requirements of Section 15-23-6(A) accordingly. In determining, waiving, or modifying backflow requirements, the Utility shall consider the hazard potential to the public water system based on the design of the customer’s water system. Written notification of the decision will be provided to the property owner. ((O)07-21, 03/21/2007; (O)98-03, 01/07/1998. Formerly 15-23-6)