Fire Sprinkler Main Installation NYC

At Harris Water Main & Sewer, we have experience with installing fire sprinkler mains in a wide variety of buildings and spaces. From offices to residential homes, retail stores to industrial factories.We’re able to perform timely, expert installations or repairs, whether you’re simply looking to upgrade a residential sprinkler service, or looking to install a large commercial service. It is becoming more frequent that NYC residential and commercial buildings are required to have fire sprinkler systems installed. New constructions consisting of one and two family houses are being required to have a safety fire system installed to keep the building up to NYC code. Many of the old sprinkler codes and regulations have been revised to better regulate the sprinkler system when installed.

Requirements for all fire sprinkler main installations

The installation of all water mains feeding a fire sprinkler system are required to obtain DEP inspection. A DEP inspector will arrive on-site throughout the installation to inspect each section of piping before the excavations are back-filled.  All fire sprinkler mains are required to have a curb valve installed on the sidewalk and an OS&Y valve installed on the inside of the building. The inspector is looking to see that the pipe being installed matches the details on all DEP permits and and is up to code.

New Questions ask Harris Bar with icons

Excavating for fire sprinkler main install

Excavating for fire sprinkler main install

Installing 3" pipe

Installing 3″ pipe

Installation & Permits in NYC

Our installation division features a staff of experienced field supervisors and crew members who will oversee the entirety of your project.  After over 95 years of proving ourselves in the field, our sprinkler installations and repairs have garnered us a reputation of being the most competent fire sprinkler specialists in the industry. When working on filing for NYC, DOB & DEP permits for a new sprinkler system, there are a few documents that the licensed plumber will require to obtain all of the necessary permits before starting your sprinkler project.

  1. A  DOB (Department of Buildings) approved plan showing the sprinkler service, water meter and/or check valve.
  2. The cross connection letter which is the DEP approval for your Backflow Prevention Device.
  3. A Copy of the meter permit from your plumber unless Harris is contracted to complete the installation of your water meter.

Does your Fire Sprinkler System require a tap or a wet connection on the city main?


Wet connection

If you are installing a new 2”copper main or anything smaller in size, you will be required to install the same size tap connection on the city main. This differs from a domestic water service where the tap connection would be one size smaller than the pipe.  In most cases when installing a new 3” ductile iron sprinkler service or larger, you will be required to install a wet connection of equal size to the pipe unless approved plans state otherwise. Example: A 3” ductile iron pipe would require a 3” wet connection to be connected to the city main. The only exception to these rules would be if the contractor is making a repair to a existing 2.5” or 3” sprinkler main that was previously hooked up to a 2” tap connection.  In this case the contractor would hook-up to the existing 2” tap on the city main.

What is a Backflow Prevention Device and why are they required?

Backflow Prevention Device

Backflow Prevention Device

Backflow prevention devices prevent contaminated water or chemicals from flowing backwards into the public water system from the fire sprinkler system.  Certain types of business that are more prone to contaminated water and most buildings with a sprinkler system require a backflow prevention device. Backflow Prevention Devices are an essential piece of the “New York City Department of Environmental Protection’s Drinking Water Protection Program”.  Backflow Prevention Devices are now mandatory under the “New York State Sanitary Code and the Rules of the City of New York” for any businesses that may serve as a risk to public water supply.

contact 24-7Harris LOGO ba718-495-3600