Wisconsin Administrative Code › Department of Natural Resources › NR 800 - Environmental Protection - Water Supply › Chapter NR 811 - Requirements For The Operation And Design Of Community Water Systems › Subchapter X - Distribution Systems › Section NR 811.71 - Hydrants

Current through June 24, 2024
(1) LOCATION. Fire hydrants shall be provided
				  at each street intersection and at intermediate points between intersections.
				  Fire hydrant spacing shall be no more than 600 feet between fire
				  hydrants.
(2) SIZE. Fire hydrants
				  shall have a bottom valve size of at least 5 inches, one 4.5-inch pumper
				  nozzle, and 2 2.5-inch nozzles unless the waterworks has established other
				  hydrant criteria which are in accordance with AWWA standards C502 and C503 in
				  effect at the time of design and are approved by the department. The connecting
				  main between the supply main and the hydrants shall be a minimum of 6 inches in
				  diameter.
(3) RESTRICTIONS. Fire
				  hydrants may not be installed on proposed water mains which will not have
				  minimum flow and pressure as required in s.
				  NR 811.70
				  (6). The department may approve the
				  installation of hydrants if system improvements which will make at least 500
				  gpm available at 20 psi are planned for construction within one year following
				  construction of the proposed improvements. If the department approves the
				  installation of hydrants which do not meet the minimum flow and pressure
				  requirements of s.
				  NR 811.70
				  (6), the hydrants shall be color coded or
				  tagged and the fire chief shall be notified in writing that fire department
				  pumpers may not be connected to the hydrants until the necessary additional
				  improvements are made and fire flow tests have shown that greater than the
				  minimum required flow and pressure are available.
(4) DRAINS. Hydrant drains may not be
				  connected to, or located within 8 feet of sanitary sewers, storm sewers, or
				  storm sewer inlets. If groundwater rises above the drain port, hydrant drain
				  ports shall be permanently plugged prior to installation or hydrants with no
				  drain ports installed and hydrant barrels shall be pumped dry during freezing
				  weather. If hydrant drain ports are not plugged, a gravel pocket or dry well
				  shall be provided unless the department finds that the natural earth will
				  provide adequate drainage.
(5)
				  AUXILIARY VALVES ON HYDRANT LEADS. Auxiliary valves shall be installed on all
				  hydrant leads.
(6) SERVICE LATERALS
				  ON HYDRANT LEADS PROHIBITED. Service laterals may not be installed on hydrant
				  leads.
(7) FLUSHING HYDRANTS.
				  Flushing hydrants or blow-off installations shall be installed at all dead ends
				  and at intermediate locations as necessary in order to remove sediment and
				  optimize water quality for all water systems that do not provide fire
				  protection. Flushing hydrants shall be sized to provide a minimum velocity of 3
				  feet per second in the water main being flushed. Flushing hydrants shall allow
				  frost-proof operation. If necessary, flushing hydrants shall be pumped out
				  prior to freezing weather.
(8)
				  SAMPLING HYDRANTS AND FAUCETS. All water systems shall be provided with a
				  sufficient number of sampling faucets, hydrants, or stations to provide
				  representative water quality sampling sites throughout the water distribution
				  system including extremities and dead ends. An adequate number of sampling
				  sites shall be provided as required under the department's monitoring plan
				  requirements contained in ch. NR 809 to meet all of the department's water
				  quality sampling requirements. Sampling faucets, hydrants, and stations shall
				  be protected from contamination and vandalism to the extent possible. Locks
				  shall be provided for sampling station enclosures. Fire hydrants may not be
				  considered as sampling hydrants. All sampling locations shall be pumped out
				  prior to freezing weather if necessary. Sampling installations may not have
				  drain-to-soil weep ports and shall not drain to any sanitary or storm
				  sewer.