Mandatory Downspout Disconnection

This downspout reroutes rooftop drainage pipes so rainwater drains into a permeable area, rather than the storm sewer.

It is mandatory for homeowners to ensure their downspouts (rain gutters) are disconnected from the City’s sanitary sewer system. These connections are not allowed under New York City’s Rules because they can overwhelm the sewer with rainwater and cause sewer back-ups in basements and flooding in neighborhoods. DEP plans to start enforcement of this rule.

Disconnecting downspouts is a relatively inexpensive repair and can be done quickly. You can do it yourself or hire a contractor.

Disconnecting downspouts helps protect your home, your neighbors and the sewer system.

Expand All Collapse All

Things to Consider When Disconnecting

Before starting, consider these important guidelines:

Water should flow away from a building’s foundation.
Water should not be directed onto neighboring properties or the sidewalk.
Consider using a rain barrel to capture and store rainwater for reuse (watering plants or washing cars).
Consider extending downspouts under a deck, patio or to a grassed or garden area.
Consider creating a rain garden or removing hard surfaces, such as concrete pathways or patios, to allow water to infiltrate.
Proper maintenance of your gutters and downspouts is important to ensure they are working properly.

Guidance on Disconnecting

Cut the downspout above the sewer connection.
Cap the sewer standpipe.
Attach an elbow and extension to redirect water at least 6 feet from the foundation.
Ensure water flows to an absorbent surface (e.g., lawn), not onto sidewalks or neighboring properties.

Cut the downspout above the sewer connection

Cap the sewer standpipe

Attach an elbow and extension to redirect water at least 6 feet from the foundation

Three-part image above courtesy of: City of Toronto.

Disclaimer

The instructions reflect a commonly-used method of downspout disconnection. However, the City cannot guarantee the accuracy or sufficiency of the information in its application to any particular property. Where appropriate, professional advice and service should be sought from a knowledgeable and licensed contractor or civil engineer.

The City, DEP and the Water Board expressly disclaim all liability for any loss, injury or damage arising directly or indirectly from the use of, or reliance on, this information.

Hiring a Contractor

Rather than doing it yourself, you may prefer to seek the professional advice and services of a licensed contractor to perform the disconnection. If you choose to hire a contractor, be consumer-wise. To ensure the job is completed properly:

Get at least three quotes.
Get references from other customers.
Enter into a written contract that outlines all work to be done, the cost and the payment schedule.

Be aware of any contractors who:

Quote prices before seeing the job.
Give you a “special price.”
Offer discounts if they can “use your home to advertise their services.”

Learn more from the Better Business Bureau.

How to Certify Your Disconnection

You can certify your downspout disconnection from the sanitary sewer with the NYC Downspout Disconnection Certification Form. All submissions are subject to audit.

Access the NYC Downspout Disconnection Certification Form

Non-Compliance

Non-compliance may result in fines or enforcement actions.