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The original item was published from 3/12/2020 11:35:36 AM to 7/23/2020 12:00:02 AM.

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Posted on: March 12, 2020

[ARCHIVED] Trenton Water Works to Inspect and Flush Fire Hydrants

TWW to Inspect Fire Hydrants and Flush Water Mains Throughout Its System

Trenton, N.J. — Trenton Water Works will conduct two routine, water-industry-standard

procedures in its five-municipality service area in the days ahead: inspection of fire hydrants

for optimum fire protection and unidirectional flushing to maintain high water quality.

"We conduct fire hydrant inspections annually to ensure operability and appropriate pressure.

Fire protection is a critical part of our mission," said Michael Walker, Chief of Communications

and Community Relations at Trenton Water Works, which is operated by the city’s Department

of Water & Sewer. "Our water-distribution-system technicians use unidirectional flushing to

clear 4 to 16-inch water mains of sediment and other pipe deposits, which maintains high water


Fire Hydrant Inspections

Beginning in Trenton on March 16, TWW’s construction and maintenance unit will begin

inspecting 3,501 fire hydrants system-wide for mechanical operability, pressure and

appearance. This year, hydrants will be sandblasted and color-coated to indicate total flow

volume in gallons per minute. The schedule is as follows: Trenton, March 16 to May 24; Ewing

Township, May 25 to June 7; Lawrence Township, June 8-21; Hamilton Township, June 22 to

July 5; and Hopewell Township, July 7-20.

Unidirectional Flushing (UDF)

Starting on April 6, TWW’s water-distribution technicians will operate valves and open fire

hydrants to flush water mains and clear them of sediment and other deposits, a process that

maintains high water quality. The work will be conducted Monday to Thursday evenings,

between 8 p.m. and midnight, to minimize inconvenience to residents. The UDF schedule is as

follows: Ewing Township, April 6-30; Hopewell Township, May 4-28; Lawrence Township, June

1-30; Hamilton Township, July 6 to August 30; and Trenton, September 1-30.


Media Contact

Michael Walker

(609) 989-3033

Hydrant inspections and high-velocity, water-main flushing may cause temporary water

discoloration, also called "brown water.” This is when deposits from iron pipes dissolve into the

water delivered to the tap. In these situations, we recommend that residents do not drink, cook

or do laundry with brown water, and run the cold tap until the water is clear.

"We expect minimal inconvenience to our service-area residents,” stressed Walker. “However,

some may experience brown water, a temporary condition when fire hydrants are opened. You

can easily restore clarity by allowing the tap closest to the home’s water meter to run for at

least 10 minutes until the water runs clear.”

Trenton Water Works is among the largest publicly owned, urban water utilities in the United States. It supplies an

average of 27 million gallons of Delaware River-sourced drinking water per day to 63,000 metered customers. It services

more than 200,000 people in Trenton, parts of Hamilton Township, Ewing Township, Lawrence Township and

Hopewell Township in Mercer County, New Jersey. Established more than 200 years ago, TWW operates a

60-million-gallon water-filtration plant and water-distribution system that includes a 100-million-gallon reservoir. TWW’s

system has 683 miles of water mains varying in size from 4 to 48 inches in diameter, three pump stations, and six

interconnections between TWW and other water suppliers.


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