Springfield Utility Board

Cross Connection Control and Backflow Prevention

Anytime you tap into the community’s drinking water system (to put in new irrigation pipes, for example), state law requires that you install a backflow assembly. Backflow assemblies prevent water from “flowing back” into the drinking water lines, potentially contaminating the water system.

Prior to installing a backflow assembly:

Step 1: Contact SUB’s Water Division 541-726-2396 to discuss your plumbing construction or modification plans.

Step 2: Familiarize yourself with how to install a backflow assembly that meets the requirements of SUB’s Cross Connection Control (CCC) Program Standards.

Step 3: Understand your responsibilities for protecting the public water supply and your own plumbing. Read the Customer Stewards in Preventing Cross Connections. Also, the installation of a backflow assembly may alter the customer system operating pressure, flow, and/or influence other hydraulic functions. Additional plumbing adjustments may be required to prevent thermal expansion damage. Please refer to the thermal expansion brochure Protect Your Water Heater from Thermal Expansion.


Installation of Backflow Assembly:

Step 4: Obtain a permit from the City of Springfield.

Step 5: Refer to the following publications and standard drawing to correctly install your backflow assembly. SUB will not be held responsible for plumbing corrections or delays in obtaining or continuning water service due to backflow assembly installations that do not meet SUB’s CCC Program Standards.

Residential and Commercial Informational Flyers:

Residential Irrigation System Backflow Assembly Installation

Residential Fire System Backflow Assembly Installation

Commercial, Industrial and Public Backflow Assembly Installation

Commercial, Industrial and Public Fire System Backflow Assembly Installation

Domestic and Irrigation Service Backflow Assembly Standard Drawings

Reduced Pressure Backflow Assembly (RPBA) 2″ & smaller (FF11DE90)…………W2.00

Reduced Pressure Backflow Assembly (RPBA) larger than 2″ (FF11DE91)……….W2.01

Fire Sprinkler System Backflow Assembly Standard Drawings

Double Check Detector Assembly (DCDA) 2″ & larger (FF11DE92)……………….W2.02

Reduced Pressure Detector Assembly (RPDA) larger than 2″ (FF11DE93)……….W2.03

Double Check Valve Assembly (DCVA) 2″ & smaller (FF11DE88)………………….W2.04

Double Check Valve Assembly (DCVA) larger than 2″ (FF11DE89)………………..W2.05

Airgap Backflow Protection (FF11DE94)……………………………………………………..W2.06

After the assembly is installed: 

Step 6: Inspection of the assembly installation is required by SUB’s Water Division Cross Connection Specialist and the City of Springfield’s Plumbing Inspector. For the inspections call SUB’s Water Division at 541-726-2396 and the City’s 24-hour building inspection request line at 541-726-3769.

Step 7: Testing of the assembly is required to be performed by an Oregon Health Authority Certified Backflow Assembly Tester with a copy of the test results provided to SUB’s Water Division. Download a list of certified testers here.  Also available is the Water Division’s Certified Backflow Assembly Tester Code of Conduct here.

For more information about backflow prevention, assemblies, and testing – including printed materials – call SUB’s backflow experts at 541-726-2397.

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