A sprinkler includes a frame, a deflector member, a sealing assembly, and a releasing mechanism for a controlled actuation. The releasing mechanism includes a hook member, a strut member, a load member, a link member, and an actuator. The link member surrounds or frames the strut and hook members and holds the members in a static relationship of an unactuated configuration. A preferred link member includes a single central slot through which each of the hook member and the strut member extend. The actuator is arranged with respect to the link member to separate the hook and strut members and break the link member upon operation of the actuator.

A sprinkler includes a frame, a deflector member, a sealing assembly, and a releasing mechanism for a controlled actuation. The releasing mechanism includes a hook member, a strut member, a load member, a link member, and an actuator. The link member surrounds or frames the strut and hook members and holds the members in a static relationship of an unactuated configuration. A preferred link member includes a single central slot through which each of the hook member and the strut member extend. The actuator is arranged with respect to the link member to separate the hook and strut members and break the link member upon operation of the actuator.

An automatic fire hydrant water supplying system provides hydrant supply water to a fire truck having a water pump; a water pump master intake valve; a water-supply fire hose, a pressure sensor upstream of the master-intake-valve, and a water-pump control system. The automatic fire hydrant water supplying system has a remotely-controllable hydrant discharge valve connectable to the hydrant and to the fire-hose. A remotely-controllable air bleed valve is in fluid communication with the master-intake-valve and the fire-hose. The water-pump control system determines whether a pressurized volume in the fire hose upstream of the master-intake-valve input port is air or water based on a difference in density between air and water as sensed by the pressure sensor and if the pressurized volume is air causes the air to be vented to atmosphere through the air-bleed-valve before opening the master-intake-valve to provide hydrant supply water to the water pump.

An automatic fire hydrant water supplying system provides hydrant supply water to a fire truck having a water pump; a water pump master intake valve; a water-supply fire hose, a pressure sensor upstream of the master-intake-valve, and a water-pump control system. The automatic fire hydrant water supplying system has a remotely-controllable hydrant discharge valve connectable to the hydrant and to the fire-hose. A remotely-controllable air bleed valve is in fluid communication with the master-intake-valve and the fire-hose. The water-pump control system determines whether a pressurized volume in the fire hose upstream of the master-intake-valve input port is air or water based on a difference in density between air and water as sensed by the pressure sensor and if the pressurized volume is air causes the air to be vented to atmosphere through the air-bleed-valve before opening the master-intake-valve to provide hydrant supply water to the water pump.

A cartridge with a status indicator, a fire suppression system for incorporating the same, and a method of inspecting whether a fire suppression system is capable of being actuated are provided. The status indicator is connected to the body of the cartridge. The status indicator defines a first state and a second state. The status indicator undergoes a change from the first state to the second state when exposed to a physical change. The physical change may include at least one of a decrease in temperature beyond a threshold, an increase in relative humidity beyond a threshold, and a threshold differential temperature change. The physical change is caused by the discharge of the cartridge. When installed within a fire suppression system, the status indicator enables the visual inspection of whether the fire suppression system is capable of being actuated.

A cartridge with a status indicator, a fire suppression system for incorporating the same, and a method of inspecting whether a fire suppression system is capable of being actuated are provided. The status indicator is connected to the body of the cartridge. The status indicator defines a first state and a second state. The status indicator undergoes a change from the first state to the second state when exposed to a physical change. The physical change may include at least one of a decrease in temperature beyond a threshold, an increase in relative humidity beyond a threshold, and a threshold differential temperature change. The physical change is caused by the discharge of the cartridge. When installed within a fire suppression system, the status indicator enables the visual inspection of whether the fire suppression system is capable of being actuated.

A fire protection system includes a pipe system in fluid communication with a water source. A local processing unit is operatively coupled to a radio frequency identification (RFID) tag reader antenna. Sensors monitoring a sensor area for the presence of a fire are in electrical communication with the local processing unit. Fluid distribution devices in fluid communication with the pipe system are configured to deliver water from the water source to the sensor area. An RFID tag apparatus is coupled to one of the fluid distribution devices and includes an RFID tag antenna positioned within the pipe system and is configured to transmit and receive radio frequency (RF) signals to and from the RFID reader antenna and local processing unit, through the pipe system.

A fire protection system includes a pipe system in fluid communication with a water source. A local processing unit is operatively coupled to a radio frequency identification (RFID) tag reader antenna. Sensors monitoring a sensor area for the presence of a fire are in electrical communication with the local processing unit. Fluid distribution devices in fluid communication with the pipe system are configured to deliver water from the water source to the sensor area. An RFID tag apparatus is coupled to one of the fluid distribution devices and includes an RFID tag antenna positioned within the pipe system and is configured to transmit and receive radio frequency (RF) signals to and from the RFID reader antenna and local processing unit, through the pipe system.

A corrosion monitoring system of a fire protection system includes at least one first antenna and a processing circuit. The at least one first antenna receives a radio frequency (RF) signal through an internal volume of at least one pipe of the fire protection system. The processing circuit includes one or more processors and memory including computer-readable instructions that when executed by the one or more processors, cause the one or more processors to determine a signature of the RF signal, compare the signature to an expected signature, and determine, based on the comparison, that corrosion in the at least one pipe has occurred.

A corrosion monitoring system of a fire protection system includes at least one first antenna and a processing circuit. The at least one first antenna receives a radio frequency (RF) signal through an internal volume of at least one pipe of the fire protection system. The processing circuit includes one or more processors and memory including computer-readable instructions that when executed by the one or more processors, cause the one or more processors to determine a signature of the RF signal, compare the signature to an expected signature, and determine, based on the comparison, that corrosion in the at least one pipe has occurred.