A mid-mount fire apparatus includes a chassis, a body assembly coupled to the chassis, a front cabin coupled to the chassis forward of the body assembly, a front axle coupled to the chassis, a tandem rear axle coupled to the chassis, and a ladder assembly having a proximal end that is coupled to the chassis rearward of the front cabin and between the front axle and the tandem rear axle. The ladder assembly includes a plurality of ladder sections. The ladder assembly is extensible to a horizontal reach of at least 88 feet. A distal end of the ladder assembly does not extend beyond the rear end of the body assembly when fully retracted.

A mid-mount fire apparatus includes a chassis, a body assembly coupled to the chassis, a front cabin coupled to the chassis forward of the body assembly, a front axle coupled to the chassis, a tandem rear axle coupled to the chassis, and a ladder assembly having a proximal end that is coupled to the chassis rearward of the front cabin and between the front axle and the tandem rear axle. The ladder assembly includes a plurality of ladder sections. The ladder assembly is extensible to a horizontal reach of at least 88 feet. A distal end of the ladder assembly does not extend beyond the rear end of the body assembly when fully retracted.

A fluid system includes a ratio controller. The ratio controller includes a housing, a nozzle, and a diffuser. The housing defines a mixing chamber, a first inlet positioned at a first end of the mixing chamber, an outlet positioned at an opposing second end of the mixing chamber, and a second inlet positioned at a location around a periphery of the mixing chamber between the first inlet and the outlet. The first fluid is configured to receive a first fluid input. The second inlet is configured to receive a second fluid input. The nozzle includes a nozzle inlet positioned proximate the first inlet and a nozzle outlet positioned within the mixing chamber. The diffuser extends from the outlet and outward from the housing. The diffuser includes a diffuser inlet positioned within the mixing chamber.

A fluid system includes a ratio controller. The ratio controller includes a housing, a nozzle, and a diffuser. The housing defines a mixing chamber, a first inlet positioned at a first end of the mixing chamber, an outlet positioned at an opposing second end of the mixing chamber, and a second inlet positioned at a location around a periphery of the mixing chamber between the first inlet and the outlet. The first fluid is configured to receive a first fluid input. The second inlet is configured to receive a second fluid input. The nozzle includes a nozzle inlet positioned proximate the first inlet and a nozzle outlet positioned within the mixing chamber. The diffuser extends from the outlet and outward from the housing. The diffuser includes a diffuser inlet positioned within the mixing chamber.

Disclosed are systems and methods for remotely controlling and monitoring water supply systems in buildings. A system can include a sensor to continuously detect building conditions, an electromechanical device to control a water valve located along a water supply for the building, a user computing device to display information about the building conditions, and a computer system to: continuously receive building condition information from the sensor, determine, based on the information, that an emergency has been detected, generate and transmit first instructions that cause the electromechanical device to turn off the water valve, generate and transmit second instructions that cause the user computing device to present information about the emergency in a graphical user interface (GUI) display, receive user input to control the electromechanical device, and generate and return third instructions to control the electromechanical device based on the user input and/or the continuously received sensor information.

Disclosed are systems and methods for remotely controlling and monitoring water supply systems in buildings. A system can include a sensor to continuously detect building conditions, an electromechanical device to control a water valve located along a water supply for the building, a user computing device to display information about the building conditions, and a computer system to: continuously receive building condition information from the sensor, determine, based on the information, that an emergency has been detected, generate and transmit first instructions that cause the electromechanical device to turn off the water valve, generate and transmit second instructions that cause the user computing device to present information about the emergency in a graphical user interface (GUI) display, receive user input to control the electromechanical device, and generate and return third instructions to control the electromechanical device based on the user input and/or the continuously received sensor information.

The method of maintaining a first flow rate through a first valve in a fluid delivery system, the fluid delivery system including a and a plurality of fluid valves in fluid communication with the pump, and a controller controlling the pressure generated by the pump and the position of the plurality of valves. The method includes providing the first flow rate of a fluid pressurized by the pump through the first valve, receiving a request for a second flow rate of the fluid through a second valve, determining a predicted effect on the first flow rate based on the request, adjusting at least one of the position of the first valve and the pressure generated by the pump to maintain the first flow rate based on the predicted effect, and adjusting the position of the second valve to provide the second flow rate of the fluid through the second valve.

The method of maintaining a first flow rate through a first valve in a fluid delivery system, the fluid delivery system including a and a plurality of fluid valves in fluid communication with the pump, and a controller controlling the pressure generated by the pump and the position of the plurality of valves. The method includes providing the first flow rate of a fluid pressurized by the pump through the first valve, receiving a request for a second flow rate of the fluid through a second valve, determining a predicted effect on the first flow rate based on the request, adjusting at least one of the position of the first valve and the pressure generated by the pump to maintain the first flow rate based on the predicted effect, and adjusting the position of the second valve to provide the second flow rate of the fluid through the second valve.

A concealed sprinkler including a body having a proximal portion and a distal portion. The distal portion includes an annular wall defining a chamber and an opening in communication with the chamber. A deflector assembly is disposed within the chamber. A trigger assembly having a lever assembly engaged with an inner surface of the annular wall supports the deflector assembly in the first position, the trigger assembly including and a thermally rated plate assembly having a lip portion to substantially circumscribe and substantially cover opening and chamber.

A control system for use with a fire-fighting device includes a remote component having a touch sensitive screen configured to receive a user-requested parameter of fluid and to display a plurality of indicators associated with the fire-fighting device. The control system also includes a base component including a programmable logic controller having predefined logic stored thereon. The base component automatically controls operation of the pump based on the predefined logic and the user-requested parameter of fluid. The remote component receives signals from the base component and presents, via the touch sensitive screen, at least one of a first of the plurality of indicators indicative of a water volume associated with a first water source stored at a fire fighting device, and a second of the plurality of indicators indicative of a water pressure associated with a second water source remote from the fire-fighting device.