Backwater valves, also known as backflow prevention devices, are installed on a sewer lateral that connects the building to the public sewer in the street. A properly working backwater valve allows flow to go in only one direction (out), preventing wastewater from entering your building during surcharges of the public sewer system or back-ups caused by storms.

DC Water has expanded its backwater valve rebate program beyond the limited combined sewer areas to now reimburse eligible residents who have documented sewer back up from both the July 1, 2012 and the September 10, 2020 storm, up to $6,000 for the purchase and installation of a backwater valve. More specifically, the expanded program offers the following:

1. For those property owners in the combined sewer area who have not yet taken part in the program, and had a documented sewer back-up since 2012, the reimbursement rate continues to be 100 percent, up to $6,000.
2. Those who have experienced a documented sewer back-up related to the September 10, 2020 storm, are now eligible for  a rebate of 100 percent of the cost associated with installing a backwater valve, up to $6,000 per property.

Backwater Valve Rebate Program

• To determine the eligibility of your property, please click on the  “New Backwater Valve Request Form” button below. If you need assistance in using this form, please contact Emanuel Briggs at 202-787-2003 or edbriggs@dcwater.com. 
  New Backwater Valve Request Form 
   
• To check status of a previously submitted backwater valve request, please have your claim number (contained in email acknowledgement of request submittal) available, and click on "Requested Backwater Valve Status Inquiry" below. If you're unable to locate your claim number please contact Emanuel Briggs at 202-787-2003 or edbriggs@dcwater.com. 
  Requested Backwater Valve Status Inquiry 
   
• For home-owners or plumbers who have completed their backwater valve installation, use the link below to upload the required documentation for review and payment. 
  Completed Backwater Valve Payment Request Submittal

Please note that DC Plumbing Code requires a permit for this work, which must be obtained by a DC-licensed Master Plumber (This applies to the installation of the valve itself, not to the preparation or any floor work.)

Additional Resources:

• Department of Consumer and Regulatory Affairs
• Rebate application, waiver and plumber's invoice
• DC Water/Backflow Prevention Institute Guide to Preventing Sewer Backups