# US 2021/0278049 A1 · Pre-assembled gas plumbing system and methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0278049 A1 - Document ID: US20210278049A1 - Status: Published application - Kind: A1 - Application number: 17/195,902 - Filed: 2021-03-09 - Published: 2021-09-09 - Earliest claimed: 2020-03-09 - Assignees: Chicago Gas Lines, Inc. - Applicants: Chicago Gas Lines, Inc. - Inventors: Edward Selleck; Ryan Gerstad - Web page: https://patentgrep.com/patent/US20210278049A1 ## CPC - F17D 1/02: for gases or vapours - F16L 19/08: with metal rings which bite into the wall of the pipe {(F16L19/045 takes precedence)} - F16L 27/0808: {the joint elements extending coaxially for some distance from their point of separation} - F16L 27/0837: {the joint elements being bends} - F16L 27/0849: {the fluid being turned through an angle when passing from one joint element to another} - F16L 21/002: {Sleeves or nipples for pipes of the same diameter; Reduction pieces (F16L27/00, F16L37/00 take precedence; with elastic sealing rings F16L21/022)} - F23D 14/20: Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone (F23D14/38 takes precedence) - F17D: PIPE-LINE SYSTEMS; PIPE-LINES (pumps or compressors F04; fluid dynamics F15D; valves or the like F16K; pipes, laying pipes, supports, joints, branches, repairing, work on the entire line, accessories F16L; steam traps or the like F16T; fluid-pressure electric cables H01B9/06) - F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL - F23D: BURNERS ## Abstract 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. ## Claims ### Claim 1 A pre-assembled plumbing system comprising: a gas pipe; a transition gas riser coupled to the gas pipe, the transition gas riser encompassing a portion of the gas pipe; a lead-in assembly coupled to a riser head assembly of said transition gas riser, said lead-in assembly including a swivel joint configured to rotatably couple a valve. ### Claim 2 (depends on 1) The pre-assembled plumbing system of claim 1, wherein the gas pipe is a polyethylene gas pipe. ### Claim 3 (depends on 1) The pre-assembled plumbing system of claim 1, wherein the gas pipe is a continuous flexible pipe formed of a material capable of being coiled prior to installation. ### Claim 4 (depends on 1) The pre-assembled plumbing system of claim 1, wherein the gas pipe is joined by either heat fusion or mechanical type fittings. ### Claim 5 (depends on 1) The pre-assembled plumbing system of claim 1, wherein the transition riser has an inner diameter that is greater than an outer diameter of the gas pipe. ### Claim 6 (depends on 1) The pre-assembled plumbing system of claim 1, wherein the transition gas riser further includes a moisture seal. ### Claim 7 (depends on 1) The pre-assembled plumbing system of claim 1, wherein the transition gas riser further includes an indicator. ### Claim 8 (depends on 5) The pre-assembled plumbing system of claim 5, wherein the indicator is indicia for designating the position of the riser head assembly. ### Claim 9 (depends on 1) The pre-assembled plumbing system of claim 1, wherein the riser head assembly comprises a swivel body, a stiffener, a compression ring, and a swivel nut. ### Claim 10 (depends on 7) The pre-assembled plumbing system of claim 7, wherein the compression ring further includes a spring-steel ferrule configured to form a seal. ### Claim 11 (depends on 1) The pre-assembled plumbing system of claim 1, wherein the lead-in assembly is a stainless steel material. ### Claim 12 (depends on 1) The pre-assembled plumbing system of claim 1, wherein the valve is a ball valve for controlling the flow of a liquid or gas. ### Claim 13 (depends on 1) The pre-assembled plumbing system of claim 1, wherein a key is used to open and close the valve. ### Claim 14 (depends on 1) The pre-assembled plumbing system of claim 1, further including an elbow attached to said valve, said elbow adapted to receive a burner pipe for delivering natural gas. ### Claim 15 (depends on 1) The pre-assembled plumbing system of claim 1, wherein said swivel joint includes a stationary member and a rotatable member, said rotatable member configured to provide 360 degrees of multi-plane range of motion. ### Claim 16 (depends on 15) The pre-assembled plumbing system of claim 15, wherein said stationary member and rotatable member are substantially cylindrical and include a substantially elbow-shaped profile. ### Claim 17 (depends on 15) The pre-assembled plumbing system of claim 15, wherein said rotatable member is coupled to said stationary member via a sealed bearing.