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Preventing Backflow (Cross Connection Control)

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UPDATE 6/15/2020: 
WaterOne now has a new Annual Backflow Testing Form that is available.  The new form is active as of 6/15/2020.  It’s a web-based form that users can utilize for submitting annual backflow test results only. 

In order to ensure safe, clean drinking water for all customers, and in adherence to Kansas regulations, WaterOne is obligated to require the installation of a backflow prevention assembly (BPA) to protect the potable (drinking) water system. Generally, water quality within plumbing systems and water distribution mains is preserved as long as water pressure is maintained. However, certain hydraulic situations may cause the reversal of flow from private plumbing systems into our distribution system, or even from individual plumbing fixtures (like a toilet) into your plumbing system. This is called backflow and it's important to prevent it.

Backflow is prevented by controlling cross connections. A “cross connection” is any actual or potential connection between a public or a consumer's potable water system, and any other non-potable liquid or gas. If backflow occurs and these cross connections are not properly protected, the drinking water within the distribution system, or even your private plumbing system, could be compromised.

We require affected customers to:  

  1. Install a containment backflow prevention assembly (BPA) on water service to:
    • Commercial property
    • Dedicated commercial irrigation lines
    • Fire lines
    • Multi-Family Residential Units four stories and above
    • Single-Family Residential Units with a Dual Water Supply Agreement        
    • Other uses as determined by WaterOne
  2. Install isolation BPAs as required by the Plumbing Code and WaterOne for the protection of the customer's plumbing system
  3. Test containment and isolation backflow prevention assemblies using a certified tester:     
    • After initial installation
    • Annually thereafter
    • Use this test report form for all new assemblies
  4. Submit completed test reports to WaterOne

Staff reviews plumbing plans for the protection of the distribution system and the customer's plumbing system.

It is at the sole discretion of WaterOne’s staff to suspend water service if the premises poses a health risk to the public water supply. 

Submitting Annual Backflow Test Reports

WaterOne requires annual backflow testing on all commercial backflow assemblies. At this time, WaterOne does not require testing for residential backflow assemblies for irrigation. We recommend you check with your city codes official for residential irrigation requirements.

Annual test reports should be submitted via the online form whenever possible. Failure to submit using the online form may result in a delay in processing. Please see our FAQ Document for using the online form for automated processing. Customers will be notified when their backflow assemblies are due for testing. In order to submit an annual test report, each assembly must have a notification number assigned by WaterOne. Please do not test assemblies before they are due. For a list of assemblies currently due for testing, please refer to the Open Backflow Notification list.

NOTE: It is a violation of Kansas law for any person to knowingly sell, give or receive, for the purpose of selling or offering for sale any property or service to persons listed therein, any list of names and addresses contained in or derived from public records.

Test reports for New, Removed, or Replaced backflow assemblies can be submitted using the old form, and may be e-mailed (preferred) or faxed to Cross-Connection Control:

Fax:    913/895-1822

To learn more, contact Cross-Connection Control at 913/895-1815. 







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