Example devices, systems, and methods disclosed herein relate to a controller configured to control pressure maintenance in a fire protection system. A controller may be configured to control a fire pump to provide a first level of water pressure and to control operation of a jockey pump that is coupled in parallel with the fire pump to provide a second level of water pressure that is less than the first level. The controller is further configured to receive, from a pressure sensor coupled to the fire protection system, an output representative of the water pressure. The controller is configured to provide instructions to initiate the jockey pump based on a pressure value associated with the output being below a first value, and to provide instructions to initiate the fire pump based on the pressure value being below a second value that is less than the first value.

An elongated hollow component includes a body extending from a first end to a second end and defining a longitudinal axis. The body includes a plurality of layers each circumscribing the longitudinal axis. The plurality of layers includes a base layer including a first steel material, and an inner surface coating coupled to a radially inner surface of the base layer. The inner surface coating includes a second steel material.

An elongated hollow component includes a body extending from a first end to a second end and defining a longitudinal axis. The body includes a plurality of layers each circumscribing the longitudinal axis. The plurality of layers includes a base layer including a first steel material, and an inner surface coating coupled to a radially inner surface of the base layer. The inner surface coating includes a second steel material.

An appliance hub for use in an upper portion of an enclosure can include a substrate configured to be positioned in an upper portion of an enclosure. The appliance hub can include a climate control apparatus mounted on the substrate and the climate control apparatus can be configured to regulate a temperature within the enclosure. The appliance hub can include one or more lighting elements configured to provide light within the enclosure, a plurality of fluid lines connected to the substrate and configured to provide fluid service and return to the climate control apparatus, and/or a plurality of electrical connections connected to the substrate and configured to provide electrical power and/or data to at least one of the climate control apparatus and the one or more lighting elements.

A combined HVAC and fire suppression system includes a HVAC apparatus and a fluid outlet for release of heat exchange fluid into a discharge plenum of the HVAC system. The heat exchange fluid is a clean agent, such that release of the heat exchange fluid into the discharge plenum provides a fire suppressant effect for a conditioned space. The HVAC apparatus includes a network of piping holding a heat exchange fluid and arranged for chilling the heat exchange fluid via a chiller connected to the piping; a fan coil unit connected to the network of piping, the fan coil unit includes a coil for passage of the heat exchange fluid chilled by the chiller, a fan for movement of air over the coil in order to transfer heat from the air to the heat exchange fluid in the coil, and the discharge plenum.

Systems and apparatuses of a sprinkler frame having an upper section, a lower section, and a channel extending along a sprinkler axis are provided. The lower section can include apertures through the frame, a guide pin having a first end with a head, a second end, and a shaft extending therebetween. The shaft of the guide pin can translate in an axial direction of the sprinkler axis within the apertures of the sprinkler frame. The deflector can couple with the second end of the guide pin and can include a first side, second side, third side, and fourth side. The first side and the second side may be smaller than the third side and the fourth side and can include an end profile defining a first tine, second tine, third tine, and fourth tine separating a first slot, second slot, and third slot.

Systems and apparatuses of a sprinkler frame having an upper section, a lower section, and a channel extending along a sprinkler axis are provided. The lower section can include apertures through the frame, a guide pin having a first end with a head, a second end, and a shaft extending therebetween. The shaft of the guide pin can translate in an axial direction of the sprinkler axis within the apertures of the sprinkler frame. The deflector can couple with the second end of the guide pin and can include a first side, second side, third side, and fourth side. The first side and the second side may be smaller than the third side and the fourth side and can include an end profile defining a first tine, second tine, third tine, and fourth tine separating a first slot, second slot, and third slot.

A fire protection system can include one or more pipes coupled with a fluid source, a pipe fitting coupled with the one or more pipes downstream of the fluid source, and at least one sprinkler coupled with the one or more pipes and the pipe fitting. The pipe fitting can include a wall defining an opening, the wall having an outer diameter, a first wall thickness at the opening, and a second wall thickness inward from the opening, the second wall thickness greater than the first wall thickness. The at least one sprinkler can be coupled with the one or more pipes and the pipe fitting to receive fluid from the fluid source through the one or more pipes and the pipe fitting.

A fire protection system can include one or more pipes coupled with a fluid source, a pipe fitting coupled with the one or more pipes downstream of the fluid source, and at least one sprinkler coupled with the one or more pipes and the pipe fitting. The pipe fitting can include a wall defining an opening, the wall having an outer diameter, a first wall thickness at the opening, and a second wall thickness inward from the opening, the second wall thickness greater than the first wall thickness. The at least one sprinkler can be coupled with the one or more pipes and the pipe fitting to receive fluid from the fluid source through the one or more pipes and the pipe fitting.

A fire suppression system includes a pipe system in communication with a fluid supply, a connector, at least one adapter pipe, and a sprinkler. The pipe system includes a first pipe and a second pipe that define a fluid supply axis oriented at an angle relative to a floor below the first pipe and the second pipe. The connector includes a connector inlet engaged with the first pipe, a connector outlet engaged with the second pipe, and an adapter outlet in communication with the connector inlet and the connector outlet. The at least one adapter pipe is engaged with the adapter outlet of the connector. The sprinkler is coupled with the at least one adapter pipe such that a spray pattern of fluid outputted by the sprinkler is oriented to correspond with a target orientation of the spray pattern.