S12 definitions.
ALARM NOTIFICATION APPLIANCE
A fire alarm system component, such as a bell, horn, speaker, light, text display or vibration device
that issues an audible, tactile, and/or visual alert.
ALARM SIGNAL
A signal indicating an emergency requiring immediate action, such as a signal indicative of fire.
ANTIFREEZE SPRINKLER SYSTEM
A wet pipe sprinkler system employing automatic sprinklers that are attached to a piping system that
contains an antifreeze solution
and is connected to a water supply. The antifreeze solution is discharged, followed by water,
immediately upon operation of sprinklers opened by heat from a fire.
AUTOMATIC BALL DRIP
An automatic drain valve horizontally installed at the low point in the piping between the lower
check valve and the Fire Department connection of automatic sprinkler systems. Water pressure
from a Fire Department pumper automatically closes this valve. It automatically re-opens when
pressure ceases, permitting this piping to drain and thereby preventing freezing.
CENTRAL STATION
A facility that receives alarm signals from a protected premises and retransmits or otherwise reports
such alarm signals to the department.
COMBINATION STANDPIPE AND SPRINKLER SYSTEM
A system where the water piping services both 21⁄2 in. (65 mm) outlets for fire
department use and outlets for automatic sprinklers.
CONCEALED SPRINKLER
A recessed sprinkler with a cover plate.
CONTROL MODE SPECIFIC APPLICATION SPRINKLERS (CMSA)
Control mode sprinkler systems are designed to control a fire until its original fuel source is depleted
or until fire-fighting activities can commence. A fire is controlled by cooling the ceiling-level air
temperatures, reducing the fire's rate of heat release and pre-wetting
adjacent combustibles.
CONTROL VALVE
A valve controlling flow to water-based fire protection systems. Control valves do not include hose
valves, inspector's test valves, drain valves, trim valves for dry pipe, preaction and deluge valves,
check valves, or relief valves.
OS&Y Valve
(Outside Stem and Yoke valve) an indicating type of control valve used for fire sprinkler system.
, Curb Valve
a non-indicating gate valve equipped with a cast iron extension box flushed with a sidewalk with an
operating nut of 1 1⁄4 inch, this valve is operated using a special curb key wrench. This valve controls
the municipal water supply serving the fire sprinkler system.
CORROSION-RESISTANT SPRINKLER
A sprinkler fabricated with corrosion resistant materials, or special coatings to be used in an
atmosphere that would corrode standard sprinklers.
DEFICIENCY
A condition in which the application of the component is not within its designed limits or
specifications.
CRITICAL DEFICIENCY
A deficiency that, if not corrected, can have an effect on the performance of the fire protection
system.
NON CRITICAL DEFICIENCY
A deficiency that does not have an effect on the performance of the fire protection system, but
correction is needed for the proper inspection, testing, and maintenance of the system(s).
DELUGE VALVE
A water supply control valve intended to be operated by actuation of an automatic detection system
that is installed in the same area as the discharge devices. Each deluge valve is intended to be
capable of automatic and manual operation.
DELUGE SPRINKLER SYSTEM
A sprinkler system employing open sprinklers that are attached to a piping system that is connected
to a water supply through a valve that is opened by the operation of a detection system installed in
the same areas as the sprinklers. When this valve opens, water flows into the piping system and
discharges from all sprinklers attached.
DRY PIPE SPRINKLER SYSTEM
A sprinkler system employing automatic sprinklers that are attached to a piping system containing
air or nitrogen under pressure. The release of the air or nitrogen,(as from the opening of a sprinkler)
results in the water pressure opening a valve known as a dry pipe valve, resulting in the flow of
water into the piping system and out of the fused sprinklers heads.
DRY SPRINKLER
A sprinkler secured in an extension nipple that has a seal at the inlet to prevent water from entering
the nipple until the sprinkler operates. May be configured with an upright pendent or sidewall
sprinkler.
DISCHARGE DEVICE
ALARM NOTIFICATION APPLIANCE
A fire alarm system component, such as a bell, horn, speaker, light, text display or vibration device
that issues an audible, tactile, and/or visual alert.
ALARM SIGNAL
A signal indicating an emergency requiring immediate action, such as a signal indicative of fire.
ANTIFREEZE SPRINKLER SYSTEM
A wet pipe sprinkler system employing automatic sprinklers that are attached to a piping system that
contains an antifreeze solution
and is connected to a water supply. The antifreeze solution is discharged, followed by water,
immediately upon operation of sprinklers opened by heat from a fire.
AUTOMATIC BALL DRIP
An automatic drain valve horizontally installed at the low point in the piping between the lower
check valve and the Fire Department connection of automatic sprinkler systems. Water pressure
from a Fire Department pumper automatically closes this valve. It automatically re-opens when
pressure ceases, permitting this piping to drain and thereby preventing freezing.
CENTRAL STATION
A facility that receives alarm signals from a protected premises and retransmits or otherwise reports
such alarm signals to the department.
COMBINATION STANDPIPE AND SPRINKLER SYSTEM
A system where the water piping services both 21⁄2 in. (65 mm) outlets for fire
department use and outlets for automatic sprinklers.
CONCEALED SPRINKLER
A recessed sprinkler with a cover plate.
CONTROL MODE SPECIFIC APPLICATION SPRINKLERS (CMSA)
Control mode sprinkler systems are designed to control a fire until its original fuel source is depleted
or until fire-fighting activities can commence. A fire is controlled by cooling the ceiling-level air
temperatures, reducing the fire's rate of heat release and pre-wetting
adjacent combustibles.
CONTROL VALVE
A valve controlling flow to water-based fire protection systems. Control valves do not include hose
valves, inspector's test valves, drain valves, trim valves for dry pipe, preaction and deluge valves,
check valves, or relief valves.
OS&Y Valve
(Outside Stem and Yoke valve) an indicating type of control valve used for fire sprinkler system.
, Curb Valve
a non-indicating gate valve equipped with a cast iron extension box flushed with a sidewalk with an
operating nut of 1 1⁄4 inch, this valve is operated using a special curb key wrench. This valve controls
the municipal water supply serving the fire sprinkler system.
CORROSION-RESISTANT SPRINKLER
A sprinkler fabricated with corrosion resistant materials, or special coatings to be used in an
atmosphere that would corrode standard sprinklers.
DEFICIENCY
A condition in which the application of the component is not within its designed limits or
specifications.
CRITICAL DEFICIENCY
A deficiency that, if not corrected, can have an effect on the performance of the fire protection
system.
NON CRITICAL DEFICIENCY
A deficiency that does not have an effect on the performance of the fire protection system, but
correction is needed for the proper inspection, testing, and maintenance of the system(s).
DELUGE VALVE
A water supply control valve intended to be operated by actuation of an automatic detection system
that is installed in the same area as the discharge devices. Each deluge valve is intended to be
capable of automatic and manual operation.
DELUGE SPRINKLER SYSTEM
A sprinkler system employing open sprinklers that are attached to a piping system that is connected
to a water supply through a valve that is opened by the operation of a detection system installed in
the same areas as the sprinklers. When this valve opens, water flows into the piping system and
discharges from all sprinklers attached.
DRY PIPE SPRINKLER SYSTEM
A sprinkler system employing automatic sprinklers that are attached to a piping system containing
air or nitrogen under pressure. The release of the air or nitrogen,(as from the opening of a sprinkler)
results in the water pressure opening a valve known as a dry pipe valve, resulting in the flow of
water into the piping system and out of the fused sprinklers heads.
DRY SPRINKLER
A sprinkler secured in an extension nipple that has a seal at the inlet to prevent water from entering
the nipple until the sprinkler operates. May be configured with an upright pendent or sidewall
sprinkler.
DISCHARGE DEVICE
