DWV (Drain, Waste, & Vent)
This required U-shaped or P-shaped plumbing component maintains a liquid seal to prevent sewer gases from entering a building.
What is a trap (or P-trap)?
This physical separation between the free-flowing discharge end of a potable water pipe and an open, non-potable reservoir is the ultimate defense against backflow.
What is an air gap?
This lightweight, flexible plastic piping has become a major industry standard for potable water distribution, often color-coded red for hot and blue for cold.
What is PEX (Cross-linked polyethylene)?
Per the NJNSPC, kitchen and bar sink faucets shall be designed and manufactured so that they do not exceed this maximum flow rate in gallons per minute.
What is 2.2 GPM?
In New Jersey, the National Standard Plumbing Code acts as a specific subcode under this overarching state-wide administrative umbrella framework.
What is the Uniform Construction Code (UCC)?
Under the NJNSPC, this is the standard minimum slope per foot required for horizontal drainage piping of 3-inch diameter or less to ensure proper gravity flow.
What is 1/4 inch per foot?
This term describes water that is safe for human consumption, cooking, and washing, a primary priority of NJ plumbing code regulations.
What is potable water?
This heavy, durable metallic material was historically standard for underground sanitary drains, but is now frequently substituted with PVC.
What is cast iron?
A standard domestic food waste disposer (garbage disposal) is required to have a waste connection to the drainage system of at least this nominal size.
What is 1-1/2 inches?
This administrative body, abbreviated as the DCA, is the state-level agency responsible for adopting and overseeing construction and plumbing codes in NJ.
What is the Department of Community Affairs?
This term refers to a vertical soil or waste pipe that extends through one or more stories to receive waste from branches.
What is a stack?
According to the code, this mechanical valve must be installed if the water utility's main supply pressure exceeds 80 psi to protect residential fixtures.
What is a Pressure-Reducing Valve (PRV)?
The NJNSPC and federal law mandate that all pipes, fittings, and fixtures used to convey water for human consumption must meet this standard regarding metal content.
What is lead-free?
Unlike residential kitchen sinks, commercial food waste disposers are strictly required to have a separate trap and a minimum waste pipe of this size.
What is 2 inches?
This organization, which took over ownership of the NSPC from the PHCC in 2017, publishes the illustrated edition of the code used by NJ plumbers.
What is IAPMO (International Association of Plumbing and Mechanical Officials)?
This specific type of vent piping is completely dry and functions to bring atmospheric air into the drainage system, preventing siphonage of trap seals.
What is a vent stack (or main vent)?
This reverse flow of water or other liquids into the potable water distribution system is caused by a drop in supply pressure, creating a vacuum or partial vacuum.
What is backsiphonage?
This specific type of mechanical connection or adapter is used to join pipes made of entirely different materials, such as joining cast iron to PVC.
What is a transition coupling (or shielded/Fernco coupling)?
Laundry sinks are required by code to be deep enough to handle heavy water volume, setting the minimum required depth at this many inches.
What is 12 inches?
While the 2024 edition is out nationally, this specific edition of the NSPC (with state-specific amendments) remains the legally enforced version in New Jersey.
What is the 2021 Edition?
The NJNSPC heavily revised regulations for this specific style of venting, which allows a single horizontal vent pipe to serve multiple fixtures on the same branch.
What is wet venting?
Sink faucets with threads that allow the attachment of a garden hose must be protected by this specific type of screw-on device to prevent backflow.
What is a hose bibb vacuum breaker?
This standard chemical process, involving a primer and a solvent cement, is required to permanently fuse rigid PVC piping and fittings together.
What is solvent welding?
These specific enameled or stainless-steel receptors, used in food service and commercial kitchens, serve as indirect waste receptors to keep food prep lines hygienic.
What are sanitary floor sinks?
New to the 2021 NJ NSPC, Appendix L was officially added to establish safe and reliable plumbing system regulations for this trendy style of compact housing.
What are Tiny Houses?