Conventional sprinkler systems can include a fluid supply network comprising a plurality of interconnected conduits (i.e., pipes) rigidly supported at or above the ceiling, connected to other conduits, fittings, manifolds, valves, and sprinklers in ceilings and walls. The fluid supply network is conventionally located in walls and ceilings of an occupancy to be protected so that sprinklers, such as sidewall, upright, and pendent sprinklers can be fluidly connected thereto.
Conventionally, pipes making up the piping network are supported using pipe hangers that are fastened to the building structure, such as ceiling joists and wall studs. One example of a conventional pipe hanging system is Cooper B-Line® Pipe Hangers and Supports, manufactured by Cooper B-Line®, Inc. of Highland, Ill. The B-Line® pipe hangers permit the pipe to pass through a pair of semicircular flanges which clamp around the outer surface of the pipe by applying a frictional clamping force with fasteners, while the clamp/pipe assembly is fastened to the building structure. In such cases the pipe hanger forms no part of the fluid handling system, as no part of the hanger is a wetted surface, and functions merely to support the piping structurally. Other conventional piping support arrangements include pipe guides, pipe saddles, and pipe roller supports. Moreover, in cases where piping is run between floors and within the framing of walls, installers may bore holes in wall studs and flooring to permit the piping to pass therethrough. Such hole boring is labor intensive and costly.
Moreover, conventional pipe fittings, including pipe elbows, tees, and reducing bushings, are not readily fastened to the building structure to support the piping they are joining.
Sprinklers are further connected to the piping network at various locations and are usually installed on-site after the piping is installed. The sprinklers are conventionally connected to the piping network by threading each sprinkler onto a mating fitting in fluid communication with the piping network. Often, the sprinkler is installed with a special sprinkler wrench which aids in installing the sprinkler without breaking the heat sensitive sprinkler actuation mechanism need to activate the sprinkler during a fire condition. Moreover, due to space limitations pipe installers must approximate a sufficient amount of space around fittings in the piping network so that sprinklers can be installed with appropriate tools.
Frequently, PVC and CPVC materials are used for piping and pipe fittings for sprinkler piping networks. However, most sprinklers have threaded bodies that are formed from metals, including brass and stainless steel. In order to connect metal-bodied sprinklers having threaded connectors to PVC and CPVC piping, adapters are conventionally used. One typical example relies on bonding a threaded female PVC or CPVC adapter to the outer surface of the PVC or CPVC piping which can receive a male threaded connector of a sprinkler. The bonding agent is typically a suitable pipe cement that forms a permanent connection between the adapter and the pipe. Care must be taken by the installer not to overtighten the sprinkler threads in the PVC or CPVC fitting, which could cause such adapter fittings to crack, requiring further labor, material, and time expense to repair the damage.
In addition, in the case of residential and commercial sprinkler installations, sprinklers must be connected to the piping network such that when wallboard covers the piping and wall structure the installed sprinkler will be at a desired distance from the surface of the wallboard. In addition, design changes may occur after the installation of the piping network requiring alterations in the thicknesses of wallboard which are not usually accounted for in the layout of the piping network.
One attempted solution to the foregoing problems is the FIREPEX® Residential Fire Protection System by REHAU. The REHAU system uses an EVERLOC® model tee fitting to connect conduits of the piping network and sprinklers together. The EVERLOC fitting can be affixed to the structure of a building. Flexible tubing is terminated with mating EVERLOC fittings are connected to mating connectors of the EVERLOC tee fittings and are connected with a snap fit connection. A fire protection sprinkler is also connected to one of the ports of the tee fitting.
In a first aspect, the present inventors have provided a fluid distribution system including a fluid supply, at least one conduit in fluid communication with the fluid supply, and at least one mountable fitting fluidly coupled to the conduit. The mountable fitting includes a body and a mounting base. The body defines a cavity having a plurality of ports in fluid communication with the cavity and the conduit, at least one port of the plurality of ports having a connection portion configured to fluidly couple to at least the fluid conduit. The mounting base extends a fixed distance from the body configured to be mounted to a structure to space the body a fixed distance from the structure.
In another aspect the inventors have provided a fitting that comprises a body and a mounting base. The body defines a cavity having a plurality of ports in fluid communication with the cavity, at least one port of the plurality of ports having a connection portion configured to fluidly couple to at least a conduit. The mounting base extending a fixed distance from the body configured to be mounted to a structure to space the body a fixed distance from the structure.
The fitting may be formed of brass, acetyl copolymer, stainless steel, copper, iron, CPVC, nylon, and PVC. The fitting may include two, three, and four ports.
In the discussion that follows, like reference numbers correspond to like elements.
A first embodiment of a mountable fitting is shown as part of a sprinkler system in accordance with an aspect of the invention in
The mountable fitting 102 includes a body 110 in fluid communication with the first port 106 and the second port 107. The body 110 of the fitting 102 may have at least one flat portion 125 on its outer surface, and more preferably may have at least two flat portions 125. Such flat portions 125 may be configured to be used in conjunction with a tool, such as a wrench, to secure the fitting during connection of the sprinkler 105 and/or connecting the first connection portion 111 to the tailpiece 109 while turning a nut 113 to engage threads on the first connection portion 111.
The first port 106 is configured to connect to the tailpiece 109 and the second port 107 is configured to connect to the sprinkler 105. The first port 106 includes a first connection portion 111 configured as a threaded connection. The threads of the first connection portion 111 are configured to engage with mating threads of the nut 113. In one embodiment, the threads of the first connection portion 111 includes a set of male unified fine thread (UNF) threads for engaging with a set of female UNF threads on the inner annular surface of the nut 113. The tailpiece 109 has an annular sealing flange 114 having a sealing face configured to seal against an annular sealing gasket 115. The gasket 115 can be formed from various seal materials, including rubber, EPDM, silicone, and buna-n. The tailpiece 109, gasket 115, and first connection portion 111 can be compressed and sealed together by virtue of the engagement of the complimentary threaded portions of the first connection portion 111 and the nut 113 and the annular sealing flange 114 and a complimentary annular sealing flange 130 (
The second port 107 includes a second connection portion 112 having a threaded connection configured to engage mating threads of a threaded connection of the sprinkler 105 to fluidly couple the sprinkler 105 to the fitting 102. In one embodiment, the second connection portion 112 may include a set of female national pipe threads (NPT) for engagement with a set of male NPT threads of the sprinkler 105. The sprinkler 105 is shown configured as a recessed pendent sprinkler, such as the model F1 residential FP sprinkler manufactured by The Reliable Automatic Sprinkler Company, Inc. The recessed sprinkler 105 preferably includes an escutcheon 122 which is connected to a cup 123 that is threaded onto the threads of the sprinkler 105. The cup 123 is configured to receive the escutcheon 122 and retain the escutcheon 122 in contact with the lower surface of the ceiling board 124. Preferably, the escutcheon 122 and cup 123 are configured to be connected in such a manner that there is some adjustability of movement to account for variations in the mounting distance of the fitting 102 with respect to the ceiling.
The mountable fitting 102 also includes at least one pedestal 117 or base extending from the body 110 configured to be mounted to a portion of a structure 116, such as, for example, a wall stud or ceiling joist of a building. The pedestal 117 includes a mounting flange 118 and an extension portion 121 between the body 110 and the mounting flange 118. The mounting flange 118 has a length “L” that extends in a direction that is substantially transverse to the axis A-A of the fitting body 110. In one embodiment the length L of the mounting flange 118 is larger than the outer diameter of the portion of the body 110 laterally across from the mounting flange 118. As shown in the embodiment shown in
The pedestal 117 is configured to dispose the body 110 of the fluid connection portions 111 and 112 at a certain fixed distance and orientation with respect to the building structure 116, as shown in
As shown in
The pedestal 117 may have alternate mounting configurations to account for various sprinklers 105 connected to the fitting 102 and space limitations between the piping network 101 and the ceiling 124, for example. For example, in the embodiment shown in
The extension portion 121 is preferably formed as a gusset between the mounting flange 118 and the body 110 of the fitting 102. The extension portion 121 extends in a plane through the axis of the body 110, laterally between the mounting flange 118 and the body 110 and tapers vertically upwards from the mounting flange 118 towards the first connection portion 111 on the outer surface of the body 110.
The extension portion 121 includes a notch 121a at its lower surface which is preferably configured to accommodate a portion of the cup 123 which extends vertically upward beyond the lower surface of the second port 107.
Similar to the arrangement shown in
In one embodiment, the nut 113 is configured to retain the gasket 115 by virtue of an interference fit between the outer diameter of the gasket 115 and the inner annular diameter of the surface of the nut 113. For example, in such an embodiment the outer diameter of the gasket 115 may be configured to be slightly larger than the diameter of the inner annular surface of the nut 113, such that the gasket 115 will be retained with the nut 113 by virtue of insertion of the gasket 115 into a second end 131 of the nut 113. By virtue of such a captured gasket 115, the nut 113, gasket 115, and tailpiece 109 can be assembled together as a subassembly so that the tailpiece 109 is retained between the flange 113a of the nut 113 and the gasket 115. Such a captured tailpiece 105/gasket 115/nut 113 assembly, hereinafter referred to as a “tailpiece subassembly”, can reduce part handling during installation of the subassembly. Moreover, such the tailpiece subassembly may prevent an installer from omitting or misplacing the gasket 115 during installation. For example, where the tailpiece subassembly is already connected to the piping network 101, the subsequent installation of the fitting 102 or a fitting 102/sprinkler 105 subassembly, hereinafter referred to as a “sprinkler subassembly”, to the tailpiece 109 can be facilitated by simply threading the nut 113 onto the threads of the first connection portion 111 of the fitting 102. Other features and benefits of such a subassembly will become apparent to one of skill in the art in view of this disclosure.
A third embodiment of a mountable fitting is shown in
Each of the three ports 506-508 has a respective connection portion 511-513. In one example, the first and second ports 506, 507 has a ½ inch NPT female threaded connections and the third port 508 has a nominal 1¾ inch male, unified fine threaded (UNF) connection portion. The male threads of the third connection portion 513 are configured to engage with mating female UNF threads of a compression nut (not shown), which is configured in the same fashion as the nut 113 described above and shown in
The fitting 502 is configured to be mounted to the structure 116 in similar fashion to the first and second embodiments shown in
As shown in
The mountable fitting shown in
The various embodiments of mountable fittings discussed in the foregoing can be formed from suitable materials, such as metals, including brass and stainless steel. The fittings may be also be constructed of a suitable plastic materials, such as cross-linked polyethylene (PEX), PVC, and CPVC. The fittings are also configured to be compliant with Underwriter Laboratory Standards 11821 and 203 for fire protection service in residential applications using thermoplastic pipe fittings. Also, the fittings described above are configured to be certified with National Sanitation Foundation.
Moreover, the body 110, 510, 910 and pedestal 117, 517, 917 of the respective fittings 102, 502, and 902 described herein may be formed of different materials. For example, the bodies of the fittings may be formed from a plastic material, while the pedestal and connector portions may be made from different materials, which may be the same as the type of materials the fitting is connecting to. Alternatively, the body and the pedestal may both be formed of a plastic material. In one, the fitting is formed from brass. Moreover, while the mountable fitting is monolithic with the pedestal, it will be appreciated by one of skill in the art that in other embodiments of the mountable fitting, the body of the fitting may be configured to be operably attachable and detachable from the pedestal such, such as, for example, by snap fit connection, and the like.
The following discusses but a few of the advantages that result by virtue of the mountable fittings and system described herein. First, the mountable fittings can be mounted before the installation of any piping, so as to locate the path of the piping network. This locating feature allows the piping to be physically supported as it is simultaneously being fluidly connected to such mountable fluid connectors, eliminating conventional pipe hangers at the locations of the mountable fittings. Moreover, a sprinkler may be installed to the mountable fitting on a workbench prior to either the mountable fitting or the sprinkler being connected to the piping network. The mountable fitting/sprinkler subassembly can then be mounted to the building structure before or after the sprinkler network piping is installed. Installing the sprinkler/mountable fitting subassembly is advantageous for a number of reasons. First, it may be desirable or necessary to install sprinklers and associated fluid piping in locations where there is not sufficient space to use a tool to connect the sprinkler to the piping network, but there is sufficient space to mount the mountable fitting/sprinkler to the building structure. Secondly, mounting the mountable fitting/sprinkler subassembly is advantageous because the distance between the building structure and the finished wall surface are fixed and known prior to connecting the mountable fitting with respect to them, and so the fitting, sprinkler, and any extension pieces needed to adequately position the sprinkler relative to the finished wall, can be prefabricated and installed prior to the installation of the rest of the upstream sprinkler piping network. As a result, piping installers can work backwards, installing the system in a direction from the mounted fitting/sprinklers assemblies to the fluid supply piping, rather than plumbing the supply piping first and attempting to try to locate and precisely measure locations where sprinklers are intended to be located, and trying to estimate and provide sufficient space around any nearby building structure that might interfere with tools used for connecting the sprinkler to the supply piping. Such feature is especially advantageous where the piping is flexible or semi-rigid, such as cross-linked polyethylene (PEX) tubing, which conventionally can be cut to length, terminated with various fittings which can be connected to the connection portions of the ports of the mountable fittings. Accordingly, mounting the mountable fittings first, fixes the location of the sprinklers and the plumbing connecting to those fittings and helps ensure that the sprinklers are installed in locations which provide access for using tools or which provide sufficient access at least to mount the sprinkler and fitting assembly. Of course, the foregoing advantages are not meant as exhaustive or limiting the uses and benefits of the various aspects of the invention.
By virtue of the arrangements of the fitting 102 shown in