A water detection apparatus includes a continuity probe, a voltage source that provides a reference voltage, and a control circuit. The control circuit provides the reference voltage to the continuity probe, measures a feedback signal corresponding to the reference voltage at a predetermined location of the fire suppression system, computes a continuity between the continuity probe and the predetermined location based on the feedback signal and the reference voltage, determines whether water is present in a low point of the piping system based on the computed continuity, and predicts whether a valve tripping event is expected to occur based on whether water is present in the low point to provide a detection signal for remedial action to mitigate false trips of the valve based on detecting the water in the low point.

A system to mitigate false trips of a valve that supplies water to a piping system in a fire suppression system includes at least one edge device, a control circuit, and at least one user device. The at least one edge device monitors a parameter corresponding to at least one of a corrosion, a presence of water, a differential pressure across the valve, and a temperature in the piping system of the fire suppression system. The control circuit includes one or more processors and a memory storing instructions that, when executed by the one or more processors, cause the control circuit to receive an indication of the parameter monitored by the at least one edge device, predict whether a valve tripping event is expected to occur based on the received indication, and in response to predicting that the valve tripping event is expected to occur, provide the prediction that the valve tripping event can occur for remedial action. The at least one user device presents display data regarding the prediction.

Apparatus, methods, and articles of manufacture for maintaining the integrity or pressurization of a dry pipe sprinkler system by preventing damage to auxiliary drains from freezing temperatures are taught. An insulated, heated housing, which may be thermostatically controlled provides a controlled environment about an auxiliary drain, insulated and with a heater. An alarm may be used as well to provide warning if said auxiliary drain retains a predetermined amount of condensate and embodiments may be retrofit about an existing auxiliary drain or be provided with an auxiliary drain for installation upon a dry pipe sprinkler system.

A fire sprinkler head (12) has a valve (42) with an X-brace latch (54), and includes a flexible conduit (14). A sprinkler nozzle (16) is secured to a first end of the flexible conduit (14). The sprinkler nozzle (16) includes a first fitting (28), a sprinkler orifice (20) and fusible element (22). A second fitting (40) is secured to the second end of the flexible conduit (14) and includes the valve (42). The valve (42) has a valve element (44) which is moveable from a latched position to an unlatched position. A flexible link (56) extends from the sprinkler nozzle (16) to the X-brace valve latch (54). Breaking of the fusible element (22) releases the flexible link (56) to move from the latched position to the unlatched position, releasing the valve (42) for flow there-through.

A thermal trigger assembly for remote mechanical actuation of another fire protection system component includes an activation component having a base and a movable member. A bias member biases the movable member from a preactivation to an activated position with respect to the base. A thermally responsive element retains the movable member in the preactivation position until a predetermined thermodynamic condition is reached, when the thermally responsive element loses structural integrity. A flexible connector includes a flexible hollow outer cable housing with one end configured to be stationarily (preferably fixedly) connected with the base. A flexible cable is inside the outer cable housing for sliding movement therein and has one end configured to be stationarily (preferably fixedly) connected with the movable member. The flexible cable is moved with respect to the outer cable housing by movement of the movable member upon loss of structural integrity by the thermally responsive element.

A thermal trigger assembly for remote mechanical actuation of another fire protection system component includes an activation component having a base and a movable member. A bias member biases the movable member from a preactivation to an activated position with respect to the base. A thermally responsive element retains the movable member in the preactivation position until a predetermined thermodynamic condition is reached, when the thermally responsive element loses structural integrity. A flexible connector includes a flexible hollow outer cable housing with one end configured to be stationarily (preferably fixedly) connected with the base. A flexible cable is inside the outer cable housing for sliding movement therein and has one end configured to be stationarily (preferably fixedly) connected with the movable member. The flexible cable is moved with respect to the outer cable housing by movement of the movable member upon loss of structural integrity by the thermally responsive element.

A thermal trigger assembly for remote mechanical actuation of another fire protection system component includes an activation component having a base and a movable member. A bias member biases the movable member from a preactivation to an activated position with respect to the base. A thermally responsive element retains the movable member in the preactivation position until a predetermined thermodynamic condition is reached, when the thermally responsive element loses structural integrity. A flexible connector includes a flexible hollow outer cable housing with one end configured to be stationarily (preferably fixedly) connected with the base. A flexible cable is inside the outer cable housing for sliding movement therein and has one end configured to be stationarily (preferably fixedly) connected with the movable member. The flexible cable is moved with respect to the outer cable housing by movement of the movable member upon loss of structural integrity by the thermally responsive element.

A temperature monitoring apparatus includes a temperature sensor and a control circuit. The temperature sensor detects a temperature of a piping system, such as a temperature of water in the piping system. The control circuit includes one or more processors and a memory storing instructions that, when executed by the one or more processors, cause the control circuit to determine whether water in the piping system is expected to freeze based on the indication of the temperature, predict whether a valve tripping event is expected to occur based on determining that the water in the piping system is expected to freeze, and in response to predicting that the valve tripping event is expected to occur, provide a prediction that the valve tripping event is expected to occur for remedial action.

A dry sprinkler assembly for fire suppression uses a tube within a pipe element to maintain a spring loaded valve in a closed position at the end of the pipe element connected to a piping network. The tube is held against the biasing force of the valve's spring by a plug acted on by the temperature sensitive trigger of the sprinkler mounted on the opposite end of the pipe element.

A transport refrigeration unit (TRU) fire detection and mitigation system is provided for use with a TRU that includes a housing and components supportively disposed within the housing that are configured to condition an interior of a container. The TRU fire detection and mitigation system includes a fire detection sub-system and a mitigation sub-system. The fire detection sub-system is partially disposable within the housing and configured to detect a thermal event therein. The mitigation sub-system is coupled to the fire detection sub-system and configured to take a mitigation action responsive to the thermal event being sensed by the fire detection sub-system.