A NYC DEP water service connection can involve a new tap or wet connection, repair or relay of an existing service line, plugging an old service, or work involving a private water main. In practical terms, a tap and a wet connection are different DEP-permitted methods for physically connecting a building’s water service to the water main. The correct method depends on the existing main, service size, and project conditions, and should be confirmed by the Licensed Master Plumber and DEP. DEP controls the City water-system connection and related water-service permits, while DOB, FDNY, and DOT may control separate parts of the same project.
DEP currently uses PARIS for important water-service permit workflows, including repair and relay applications. The exact filing path depends on whether the project is creating a new connection, changing service size, repairing or replacing an existing line, or connecting to private infrastructure.
For the complete DEP topic hierarchy, see NYC DEP Permits, Filings and Compliance.
DEP’s current guidance requires supporting information for tap or wet-connection work, including an approved DOB site plan showing the plumbing riser, required service size, fronting City main, proposed service connection, and related information. A backflow approval or exemption may also be required depending on the property and system.
The project team should confirm whether the proposed service is domestic, fire, combined, or otherwise specialized because that can affect DOB, DEP, FDNY, backflow, metering, and plumbing coordination.
DEP distinguishes repairs from relays. Its current guidance states that repairs are not permitted on lead service lines and that relay is required where lead is present. DEP also notes that certain emergency repair activity may proceed under DOT emergency permitting, while a DEP permit is still required for a relay.
Fixture counts and service sizing can become important when a service is relayed or changed. The filing should be based on current property and plumbing conditions rather than assumptions from an old tap card or historical plan.
Construction of a private water main requires separate DEP approval. DEP identifies an owner application for approval to build a private water main and requires a pre-construction meeting after plan approval and before construction. Connections to an existing private or internal main can also require owner consent or other supporting documentation.
DEP directs repair and relay permit applications to PARIS. Certain self-certified water-service work also requires a Tap Card documenting completion. DEP’s current guidance states that the authorized Licensed Master Plumber must return the Tap Card within the required timeframe and that online permits require online Tap Card submission.
SLK Buildings assists property owners, developers, business operators, design professionals, contractors, and project teams with water service connection research, filing preparation, agency coordination, comments, approvals, compliance, and related NYC agency requirements within the confirmed service scope.
Disclaimer: SLK Buildings is a private consulting and construction-management firm and is not affiliated with NYC DEP or any government agency. This content is educational and is not engineering, architectural, legal, environmental, plumbing, or other professional advice. Applicability, design, licensed work, technical calculations, filing eligibility, inspections, and compliance requirements must be confirmed for the specific project by the appropriate qualified professionals and agencies.
NYC Department of Environmental Protection (DEP) requirements can affect property owners, developers, business operators, design professionals, contractors, and project teams when work involves water or sewer connections, hydrants, backflow protection, stormwater, wastewater, asbestos, air emissions, construction noise, drilling, records, violations, or other environmental requirements administered by DEP.
Before relying on a filing path, the project team should confirm the regulated activity, existing infrastructure and property records, required DEP program, current portal or submission method, licensed professional or trade requirements, inspections, testing, and related DOB, DOT, NYS DEC, FDNY, or OATH coordination.
At SLK Buildings, we assist with NYC DEP permit expediting, agency filings, Site Connection Proposals, sewer and water coordination, hydrant work, backflow, stormwater, drainage, wastewater, asbestos, air, noise, drilling and excavation coordination, records research, violations, hearings, and related multi-agency project requirements within the confirmed service scope.
Whether you are beginning a new DEP application, responding to agency comments, researching existing water or sewer conditions, coordinating licensed professionals and contractors, correcting a compliance issue, or carrying a DEP approval into related construction permitting, SLK Buildings can help organize the records, filings, coordination, and next actions needed to move the project forward.
SLK Buildings provides free educational content to help property owners, developers, business operators, design professionals, contractors, and project teams understand NYC DEP permitting, filing systems, water and sewer approvals, stormwater, environmental compliance, inspections, records, and related agency requirements.
For those who prefer professional assistance, SLK Buildings is available to coordinate DEP application strategy, filing preparation, portal submissions, agency comments, records research, licensed-professional and contractor coordination, approval tracking, violation response, and related NYC agency requirements that may affect the property or project.
Disclaimer: SLK Buildings is a private consulting and construction-management firm and is not affiliated with NYC DEP or any government agency. This content is educational and is not legal, engineering, architectural, environmental, or other professional advice. Permit, filing, design, testing, inspection, and professional-signature requirements depend on the specific property, project, regulated activity, and current agency rules.
Both are DEP-permitted methods for connecting a building water service to water infrastructure. A tap generally establishes the service connection at the water main, while a wet-connection permit is used for certain connection conditions involving an active main. The correct method and permit depend on the main, service size, and project conditions and should be confirmed by the Licensed Master Plumber and DEP requirements.
DEP currently directs repair and relay permit applications and other water/sewer workflows through PARIS.
DEP states that repairs are not permitted on lead service lines and that a relay is required where lead is present.
No. Backflow prevention is a related but separate requirement that must be evaluated for the property and proposed use.
Yes. SLK can coordinate DEP records requests for water maps, tap cards, and related information before or during the permit process.
