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Backflow Prevention

Each backflow prevention assembly that is required must function properly at time of installment. Each customer will be required to test, maintain, and repair each assembly required which is a part of the customer's private water system. A certified backflow prevention technician may only conduct such test. Testing shall be done immediately following installation of any backflow prevention assembly and on an annual or semiannual basis depending the degree of hazard.

Backflow Prevention Documents
 TitleSize
City of Concord Backflow Prevention Manual 2-14-08852.28 KB
Above Ground 2 Half Inch to 10 Inch DCVA (DWG)129.20 KB
Above Ground 2 Half Inch to 10 Inch DCVA (PDF)56.53 KB
Above Ground 2 Half Inch to 10 Inch RP (DWG)173.19 KB
Above Ground 2 Half Inch to 10 Inch RP (PDF)57.70 KB
Above Ground 3-4 Inch to 2 Inch DCVA (DWG)364.23 KB
Above Ground 3-4 Inch to 2 Inch DCVA (PDF)58.06 KB
Above Ground 3-4 Inch to 2 Inch RP (DWG)137.20 KB
Above Ground 3-4 Inch to 2 Inch RP (PDF)45.55 KB
Below Ground 2 Half Inch to 10 Inch DCVA (DWG)189.41 KB
Below Ground 2 Half Inch to 10 Inch DCVA (PDF)59.10 KB
Below Ground 2 Inch DCVA (DWG)256.93 KB
Below Ground 2 Inch DCVA (PDF)61.88 KB
Below Ground 3-4 Inch to 11-2 Inch DCVA (DWG)274.66 KB
Below Ground 3-4 Inch to 11-2 Inch DCVA (PDF)56.57 KB
Fire Service Above Ground 2 Half-Inch to 10 Inch DCDA (DWG)151.02 KB
Fire Service Above Ground 2 Half-Inch to 10 Inch DCDA (PDF)65.44 KB
Fire Service Above Ground 2 Half-Inch to 10 Inch RPDA (DWG)150.58 KB
Fire Service Above Ground 2 Half-Inch to 10 Inch RPDA (PDF)66.08 KB
Fire Service Below Ground 2 Half Inch to 10 Inch DCDA (DWG)151.55 KB
Fire Service Below Ground 2 Half Inch to 10 Inch DCDA (PDF)65.87 KB
Indoor 2 Half Inch to 10 Inch DCVA (DWG)127.95 KB
Indoor 2 Half Inch to 10 Inch DCVA (PDF)56.95 KB
Indoor 2 Half Inch to 10 Inch RP (DWG)134.55 KB
Indoor 2 Half Inch to 10 Inch RP (PDF)60.32 KB
Indoor 3-4 Inch to 2 Inch DCVA (DWG)232.46 KB
Indoor 3-4 Inch to 2 Inch DCVA (PDF)48.83 KB
Indoor 3-4 Inch to 2 Inch RP (DWG)136.52 KB
Indoor 3-4 Inch to 2 Inch RP (PDF)48.83 KB
Test Cock Assembly (DWG)236.80 KB
Test Cock Assembly (PDF)24.11 KB