5.22 Backflow Prevention

1) All backflow assemblies shall be testable and include provisions for testing by a certified backflow testing person or organization.

2) An approved backflow prevention assembly with an approved metering system shall be required for each use in the following instances:

a) When a private line must be extended from or looped between two (2) or more City mains in order to obtain the required flow and the resultant loop is not beneficial to the City grid system.

b) On all fire services, which shall also include a detector loop & meter configuration as approved by the Public Works Director.

c) On all private water lines or private distribution system attached to the City's distribution system.

d) When an auxiliary water supply exists on the property being served.

e) As determined by the City Cross-connection Control Inspector and Oregon State Health Division requirements.

3) An approved reduced pressure backflow prevention assembly with an approved metering system shall be required for service connections in high hazard areas as determined by the Director.

4) The backflow assemblies must meet the City approved assembly standards, which standards are taken from the current approved list of assemblies maintained by the OHA-DWS.

5) All backflow assemblies shall be installed in a box or vault approved by Public Works.

1) The approved backflow prevention assembly shall be installed on the property being served in place accessible for City inspector and testing and located as follows:

a) Before any branch, immediately downstream of the meter; or

b) If not meter, at the property line; or

c) If in the building, before the first branch or hazard being controlled or as determined by the City Cross-connection Control Inspector.

2) If installed outside the building being served, it shall be placed at or adjacent to the property line or easement line in a vault or structure in accordance with the manufacturer's recommendations and as approved by the Director. Vaults must have a sump and be watertight.

a) A public utility and access easement to the City shall be provided to and around any backflow assembly set on private property (i.e. when installed outside of the building being served). The easement shall be sized to provide a minimum of five (5) foot clear around the box or vault on all sides.

1) The distance from a fire hydrant to the FDC shall not exceed 40 feet unless otherwise approved in writing by the Fire Chief, but in no case shall a distance of greater than 60 feet be allowed.

2) FDCs connections/risers and FDC supply lines shall be installed in conformance with provisions of the Oregon Fire Code and applicable NFPA standards (including but not limited to installation of accessible ball drip valves, cover depths for freeze protection, etc.), with specific location and configuration subject to approval by the Fire Chief.