The invention relates generally to natural gas plumbing systems. More specifically, the present invention relates to a plumbing system that is preassembled to a large extent at a manufacturing site prior to shipping to the site of installation. The pre-assembled plumbing system may be used to convey gas to, for example, a fire pit, outdoor gas grill, fire bowl, gas lighting, and fire tables. The pre-assembled plumbing system may be easily installed and may include a flexible gas pipe, a transition riser, and a lead-in assembly. Further, the lead-in assembly may include a swivel joint configured to provide 360 degrees of multi-plane range of motion. The plumbing system may be coiled for storage and then transported to a site. Advantageously, the plumbing system is manufactured and sold as a single pre-assembled unit, thereby facilitating the ease and speed with which the plumbing system can be installed.

A pipe fitting for conveying a medium, including an inlet at which the medium enters in a first direction perpendicular to an inlet cross section, and an outlet at which the medium leaves in a second direction perpendicular to an outlet cross section, wherein the two directions enclose an angle. The pipe fitting has three parts, wherein in each case two parts bearing against one another at a contact point, wherein in each case two parts at their contact point being rotatable relative to one another about the axis of the flow direction at the contact point in order to change the angle, and wherein the two contact points being spaced apart from one another in the flow direction.

A thermal expansion compensating device has a conduit with a first opening and a second opening for connection to a first pipe and a second pipe of a hot water system, respectively, the first and second pipes being formed by removing a section from a length of pipe of the hot water system. A pre-tensioning force is applied to the device to axially displace the first opening from the second opening until after connection of the openings of the pipes. A resiliently deformable pipe segment defines a portion of the conduit between the first opening and the second opening and is resiliently deformed to a tensioned position by the application of the pre-tensioning force. Once the hot water system is activated, the pipes axially thermally expand such that the first opening moves towards the second opening and the pipe segment moves from the tensioned position towards a rest position decreasing the stress on the device.

A thermal expansion compensating device has a conduit with a first opening and a second opening for connection to a first pipe and a second pipe of a hot water system, respectively, the first and second pipes being formed by removing a section from a length of pipe of the hot water system. A pre-tensioning force is applied to the device to axially displace the first opening from the second opening until after connection of the openings of the pipes. A resiliently deformable pipe segment defines a portion of the conduit between the first opening and the second opening and is resiliently deformed to a tensioned position by the application of the pre-tensioning force. Once the hot water system is activated, the pipes axially thermally expand such that the first opening moves towards the second opening and the pipe segment moves from the tensioned position towards a rest position decreasing the stress on the device.

A swivel joint includes a first pipe section and a second pipe section. The pipe sections may define a flow path via which fluid passes through the swivel joint. One or more surfaces proximate a junction of the first pipe section and the second pipe section may be selectively coated to resist wear from erosion, corrosion, and or abrasion.

An elbow fitting and a double elbow hydraulic assembly for high pressure hydraulic pipes, also above 400 bar are disclosed, in which the elbow fitting comprises a tubular body with a curved extent between a first end and a second end, in which the first end is configured for a connection with a high pressure pipe and the second end is configured for a coupling with a coupling element configured to allow a relative rotation between the second end and the coupling element.

A conduit coupling includes a first connector at a first end of the conduit coupling, a second connector at a second end of the conduit coupling, and a stem between the first connector and the second connector. A first end of the stem is attached to the first connector. A second end of the stem is attached to the second connector. The stem is bent at a particular bend angle along a bend plane. The first connector includes an indicator that indicates an orientation of the bend plane.

A water-powered sump pump including a chamber with a water supply inlet, wastewater inlet and a discharge outlet, wherein a venturi is secured within the chamber, and an elbow joint, including a wastewater exit portion and a wastewater entrance portions. This elbow joint is rotationally securable to the wastewater inlet of the chamber to permit securing of the water-powered sump pump in any desired orientation in relation to the sump. In one embodiment the wastewater inlet includes a cylindrical ingress portion with an upwardly facing ridge around a circumference thereof. The securing system of the elbow joint includes tabs on an inner surface of the exit portion of the elbow, each tab containing an inwardly extending rib which rib extends beyond the upwardly facing ridge on the ingress portion of the wastewater inlet when the elbow joint is secured onto the wastewater inlet.

A gas pipe joint contains: a connection pipe, a first threaded pipe, and a second threaded pipe. The connection pipe includes a first part and a second part, the first part has a first threaded orifice, and the second part has a second threaded orifice. The first threaded pipe includes a first coupling section, a first nut section, and a second coupling section. The second threaded pipe includes a second nut section and a third coupling section, the second nut section has a second screwing portion, and the third coupling section has at least one second recessed portion and a second groove. The third coupling section has a second shoulder. The second shoulder has a second lower gasket. The first groove has two first loops, and the second groove has two second loops.

The invention relates generally to natural gas plumbing systems. More specifically, the present invention relates to a plumbing system that is preassembled to a large extent at a manufacturing site prior to shipping to the site of installation. The pre-assembled plumbing system may be used to convey gas to, for example, a fire pit, outdoor gas grill, fire bowl, gas lighting, and fire tables. The pre-assembled plumbing system may be easily installed and may include a flexible gas pipe, a transition riser, and a lead-in assembly. Further, the lead-in assembly may include a swivel joint configured to provide 360 degrees of multi-plane range of motion. The plumbing system may be coiled for storage and then transported to a site. Advantageously, the plumbing system is manufactured and sold as a single pre-assembled unit, thereby facilitating the ease and speed with which the plumbing system can be installed.