Combined Service Mains
This standard shall apply to __ intended to carry water for fire service mains
AHJ
Working plans shall be submitted for approval to the _ before any equipment is installed or remodeled.
Pressure-Regulating devices
__ shall not be used
Control Valves
__ shall not be installed in the piping from the fire department connection to the fire service main
Control Valves
_ shall be permitted in the system downstream of the fire department connection
Check Valve
When more than one water supply exists, a _ shall be installed in each connection
Control Valve
All check valves shall have a __ installed upstream and downstream of the check valve.
40 ft
A post indicator valve installed not less than____ from the building
32-40 inches
Where post indicator valves are used, they shall be set so that the top of each post is _ above final grade
not be required
Supervision of underground gate valves with roadway boxes shall __
not be less than 6 inches
The connection from the hydrant to the main shall _
not less than 40 ft
Hydrants shall be located _ from the buildings to be protected
flat stones, concrete slabs, or other approved material
Hydrants shall be installed on __
less than 18 inches
The center of a hose outlet shall not be __ above final grade
more than 36 inches
The center of a hose outlet shall not be _ above final grade
less than 150 psi
All piping used in private fire service mains shall be rated for the maximum system working pressure to which the piping is exposed to but shall not be rated at ___
asphalt or other corrosion-retarding material
All bolted joint accessories shall be cleaned and thoroughly coated with ___ after installation
not be less than 30 inches
In locations where freezing is not a factor, the depth of cover shall ______ below grade to prevent mechanical damage.
minimum depth of 36 inches
Private fire service mains installed under driveways or roadways shall be buried at a __
run in a covered trench
Where private fire mains extend more than 10 ft into the building, they shall be _
1 part cement, 2 1/2 parts sand, and 5 parts stone
Thrust blocks shall be concrete of a mix not leaner than __
not less than 5/8 in diameter
Rods shall be _
shall be cleaned and thoroughly coated with a bituminous or other acceptable corrosion-retarding material
After installation, rods, nuts, bolts, washers, clamps, and other restraining devices _________
restrained at the bottom of a hill and at any lateral or vertical turns
Pipe shall be _________
facing uphill
Bell ends shall be __
clear of debris
The flushing operation shall continue until water flow is verified to be _
completing and signing the contractors material and test certificates
The installing contractor shall be responsible for ___________
gauge pressure of 200 psi or 50 psi above working pressure for 2 hours
All piping shall be hydrostatically tested at ________________
10 ft/sec
Flow required to produce velocity of __ in pipes
control valves
__ do not include drain valves, check valves, or relief valves
The Standard shall cover the minimum requirements for the installation of private service mains and their appurtenances, which include the following
-Automatic Sprinkler Systems
-Open Sprinkler Systems
-Water Spray Fixed Systems
-Foam Systems
-Private Hydrants
-Monitor Nozzles or Standpipe Systems with reference to water supplies
-Hose Houses
The standard shall apply to combined service mains intended to carry water for fire service and other uses
This standard shall NOT apply to the following situations
-Mains under the control of a water utility
-Mains providing fire protection and/or domestic water that are privately owned but are operated as a water utility
The standard shall NOT apply to underground fire mains serving sprinkler systems designed and installed in accordance with NFPA 13R that are less than 4 in in nomimal diameter
The standard shall not apply to underground mains serving sprinkler systems designed and installed in accordance with NFPA 13D
The Purpose of this standard shall be to provide a reasonable degree of protection for life and property from fire through installation requirements for private service main systems based on sound engineering principles, test data, and field experience.
The provisions of this standard reflect a consensus for what is necessary to provide an acceptable degree of protection from the hazards addressed in this standard at the time the standard was issued.
Residual Pressure
The pressure that exists in the distribution system, measured at the residual hydrant at the time the flow readings are taken at the flow hydrants.
Static Pressure
The pressure that exists at a given point under normal distribution system conditions measured at the residual hydrant with no hydrants flowing.
Flow Test
A test performed by the flow and measurement of water from one hydrant and the static and residual pressures from an adjacent hydrant for the purpose of determining the available water supply at that location.
Flushing Test
A test of a piping system using high velocity flows to remove debris from the piping system prior to it being placed in service
Hydrostatic Test
A test of a closed piping system and its appurtenances consisting of subjecting to an increased internal pressure for a specified duration to verify system integrity and system leakage rates.
Check Valve
A valve that allows flow in one direction but prevents flow in the opposite direction.
Indicating Valve
A valve that has components that show if the valve is open or closed. Examples are outside screw and yoke (OS&Y) gate valves and underground gate valves with indicator posts.
Dry-Barrel Hydrant
Fire hydrant that has its operating valve located at the base or foot of the hydrant rather than in the barrel of the hydrant. When operating properly, there is no water in the barrel of the hydrant when it is not in use. These hydrants are used in areas where freezing may occur.
Flow Hydrant
The hydrant that is used for the flow and flow measurement of water during a flow test.
Private Fire Hydrant
A valved connection on a water supply system having one or more outlets that is used to supply hose and fire department pumpers with water on private property.
Public Hydrant
A valved connection on a water supply system having one or more outlets that is used to supply hose and fire department pumpers with water.
Residual Hydrant
The hydrant that is used for measuring static and residual pressures during a flow test
Wet-Barrel Hydrant
A hydrant used in areas that are not susceptible to freezing. The barrel of the hydrant is normally filled with water.
Private Fire Service Mains
Hydraulic calculations shall show that the main is able to supply the total demand at the appropriate pressure.
Mains Not Supplying Hydrants
For mains that do not supply hydrants, pipe sizes less than 6 in nominal size shall be permitted to be used subject to the following restrictions.
The main shall supply only the following types of systems
-Automatic sprinkler systems
-open sprinkler systems
-water spray fixed systems
-foam systems
-standpipe systems
Tanks shall be installed in accordance with
NFPA 22
Each remote fire department connection shall be designated by a sign as follows:
-sign shall have a raised or engraved letters at least 1 inch in height on a plate or fitting.
-The sign shall indicate the type of system for which the connection is intended.
Where post indicator valves are used, they shall be set so that the top of each post is
32-40 inches above final grade
The connection from the hydrant to the main shall not be less than
6 inches
Hydrants shall be located not less than _ from the building to be protected
40ft
Where hydrants located closer than 40ft to the building, shall be permitted to be used where approved by
the AHJ
The center of a hose outlet shall not be less than_______above final grade
18 inches
The center of a hose outlet shall not be more than_______above final grade
36 inches
The center of a hose outlet located in a hose house shall not be less than _ above the floor
12 inches
Master streams shall be delivered by monitor nozzles, hydrant-mounted monitor nozzles, and similar master stream equipment capable of delivering more than
250 GPM ( 950 LPM)
The top of the pipe shall not be buried less than _ nelow the frost line for the locality.
12 Inches
In locations where freezing is not a factor, the depth cover shall not be less than __ below grade to prevent mechanical damage.
30 Inches
Private fire service mains installed under driveways or roadways shall be buried at a minimum depth of
36 inches
Private fire mains installed under railroad tracks shall be buried at minimum depth of
4 ft
Private fire mains installed under large piles of heavy commodities or subject to heavy shock and vibrations shall be buried at a minimum depth of
4 ft