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A leak testing device to be positioned adjacent one or more conduits comprises a generally cylindrical body defining a recess therein and including first and second end portions for cooperating with an end portion of a conduit. The body includes an opening between the first and second end portions.

A leak testing device to be positioned adjacent one or more conduits comprises a generally cylindrical body defining a recess therein and including first and second end portions for cooperating with an end portion of a conduit. The body includes an opening between the first and second end portions. A sealing door or a test door is selectively positioned in the opening. A diaphragm member including a through hole is provided to be positioned within the body. A valve is operably connected to the diaphragm member for selectively opening or closing the through hole to thereby permit or restrict the flow of a fluid therethrough. A window for viewing the interior of the body for troubleshooting, diagnosis, etc., may optionally be provided. The opening in the body receives the diaphragm member and the test door when leak-testing a conduit, or the sealing door when connecting one or more conduits in a fluid communication.

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What is claimed is: 1. A coupling for connecting one or more conduits in a fluid communication, comprising: a) a generally cylindrical body defining a recess therein and including first and second end portions; b) one of said first and second end portions for cooperating with an end portion of a co

What is claimed is: 1. A coupling for connecting one or more conduits in a fluid communication, comprising: a) a generally cylindrical body defining a recess therein and including first and second end portions; b) one of said first and second end portions for cooperating with an end portion of a conduit; c) said body including a first opening between said first and second end portions for receiving a sealing door; d) said sealing door including a through hole having a diameter generally corresponding to the internal diameter of the end portion of the conduit; and e) a window for viewing the interior of said body. 2. The coupling of claim 1, wherein: a) said window comprises a generally clear material. 3. The coupling of claim 1, wherein: a) said sealing door comprises said window. 4. The coupling of claim 1, wherein: a) the first opening extends axially between said first and second end portions and includes a flared circumferential portion. 5. The coupling of claim 4, wherein: a) said body includes a second opening in communication with the first opening. 6. The coupling of claim 5, wherein: a) the second opening extends partially about the circumference of said body. 7. The coupling of claim 1, wherein: a) said body includes a tapered trough disposed generally opposite the first opening. 8. The coupling of claim 7, wherein: a) said sealing door includes an end portion to be received in said trough. 9. The coupling of claim 1, wherein: a) the internal diameter of one of said end portions is larger than the external diameter of the end portion of the conduit. 10. The coupling of claim 1, wherein: a) said first and second end portions for cooperating with the respective end portions of two conduits. 11. A leak testing kit for one or more conduits, comprising: a) a generally cylindrical body defining a recess therein and including first and second end portions; b) one of said first and second end portions for cooperating with an end portion of a conduit; c) said body including a first opening between said first and second end portions; d) a sealing door or a test door to be selectively positioned in the first opening; e) a diaphragm member to be positioned within said body; f) said diaphragm member including a through hole; g) a valve operably connected to said diaphragm member for selectively opening or closing the through hole to thereby permit or restrict the flow of a fluid therethrough; h) a window associated with said sealing door for viewing the interior of said body; and i) the first opening in said body receiving said diaphragm member and said test door when leak-testing a conduit, or said sealing door when connecting one or more conduits in a fluid communication. 12. The leak testing kit of claim 11, wherein: a) said window comprises a generally clear material. 13. The leak testing kit of claim 11, wherein: a) said sealing door comprises said window. 14. The leak testing kit of claim 11, further comprising: a) means associated with said test door for determining fluid pressure in said body. 15. The leak testing kit of claim 11, wherein: a) said test door includes a second opening for determining fluid pressure in said body. 16. The leak testing kit of claim 11, wherein: a) the first opening extends axially between said first and second end portions and includes a flared circumferential portion. 17. The leak testing kit of claim 16, wherein: a) said body includes a second opening in communication with the first opening. 18. The leak testing kit of claim 17, wherein: a) the second opening extends partially about the circumference of said body. 19. The leak testing kit of claim 11, wherein: a) said body includes a tapered trough disposed generally opposite the first opening. 20. The leak testing kit of claim 19, wherein: a) said sealing door includes an end portion to be received in said trough. 21. The leak testing kit of claim 11, wherein: a) the internal diameter of one of said end portions is larger than the external diameter of the end portion of the conduit. 22. The leak testing kit of claim 11, wherein: a) said first and second end portions for cooperating with the respective end portions of two conduits. 23. A coupling for connecting one or more conduits in a fluid communication, comprising: a) a generally cylindrical body defining a recess therein and including first and second end portions; b) one of said first and second end portions for cooperating with an end portion of a conduit; c) said body including an opening between said first and second end portions; d) a side extension defining a passageway therethrough in communication with the opening and a port opening to the exterior; e) said body including a trough on the internal periphery thereof; f) said trough extending on the internal periphery of said side extension; and g) a sealing door for closing said port. 24. The coupling of claim 23, wherein: a) said trough is tapered; and b) a sealing member to be positioned in said trough. 25. The coupling of claim 24, wherein: a) said sealing door and said sealing member are formed as one unit. 26. The coupling of claim 23, wherein: a) the internal diameter of one of said end portions is generally the same as the internal diameter of the end portion of the conduit. 27. The coupling of claim 23, wherein: a) said first and second end portions for cooperating with the respective end portions of two conduits. 28. A leak testing kit for one or more conduits, comprising: a) a generally cylindrical body defining a recess therein and including first and second end portions; b) one of said first and second end portions for cooperating with an end portion of a conduit; c) said body including an opening between said first and second end portions; d) a side extension defining a passageway therethrough in communication with the opening and a port opening to the exterior; e) said body including a trough on the internal periphery thereof; f) said trough extending on the internal periphery of said side extension; g) a sealing door for closing the port; h) a diaphragm member to be positioned within said body through the port; i) said diaphragm member including a through hole; j) a valve operably connected to said diaphragm member for selectively opening or closing the through hole to thereby permit or restrict the flow of a fluid therethrough; and k) the port receiving said diaphragm member when leak-testing a conduit, or said sealing door when connecting one or more conduits in a fluid communication. 29. The leak testing kit of claim 28, wherein: a) said diaphragm member includes an end portion to be received in a section of said trough. 30. The leak testing kit of claim 28, wherein: a) the internal diameter of one of said end portions is generally the same as the internal diameter of the end portion of the conduit. 31. The leak testing kit of claim 28, wherein: a) said first and second end portions for cooperating with the respective end portions of two conduits. 32. The leak testing kit of claim 28, further comprising: a) means for determining fluid pressure in said body. 33. The leak testing kit of claim 28, further comprising: a) a test door for closing the port when leak-testing a conduit; and b) said test door including an opening for determining fluid pressure in said body. 34. A method of testing for a leak in a conduit, comprising: a) providing a conduit to be leak-tested; b) providing a leak testing kit adjacent an end portion of the conduit, wherein the leak testing kit comprises: i) a generally cylindrical body defining a recess therein and including first and second end portions; ii) one of the first and second end portions for cooperating with the end portion of the conduit; iii) the body including an opening between the first and second end portions; iv) a sealing door to be positioned in the opening; v) a diaphragm member to be positioned within the body; vi) the diaphragm member including a through hole; vii) a valve operably connected to the diaphragm member for selectively opening or closing the through hole to thereby permit or restrict the flow of a fluid therethrough; viii) a window associated with said sealing door for viewing the interior of the body; and ix) the opening in the body receiving the diaphragm member when leak-testing a conduit, or the sealing door when connecting one or more conduits in a fluid communication; c) positioning the diaphragm in the recess through the opening; d) actuating the valve to restrict the flow of fluid through the hole; e) filling the conduit with a fluid; f) inspecting the conduit for any leaks; and g) actuating the valve to permit the flow of fluid through the hole. 35. The method of claim 34, further comprising: h) removing the diaphragm from the recess; and i) positioning the sealing door in the opening. 36. The method of claim 34, further comprising: h) determining fluid pressure in the body after step e). 37. A method of testing for a leak in a conduit, comprising: a) providing a conduit to be leak-tested; b) providing a leak testing kit adjacent an end portion of the conduit, wherein the leak testing kit comprises: i) a generally cylindrical body defining a recess therein and including first and second end portions; ii) one of the first and second end portions for cooperating with the end portion of the conduit; iii) the body including an opening between the first and second end portions; iv) a side extension defining a passageway therethrough in communication with the opening and a port opening to the exterior; v) the body including a trough on the internal periphery thereof; vi) the trough extending on the internal periphery of the side extension; vii) a sealing door for closing the port; viii) a diaphragm member to be positioned within the body through the port; ix) the diaphragm member including a through hole; x) a valve operably connected to the diaphragm member for selectively opening or closing the through hole to thereby permit or restrict the flow of a fluid therethrough; and xi) the port receiving the diaphragm member when leak-testing a conduit, or the sealing door when connecting one or more conduits in a fluid communication; c) positioning the diaphragm in the recess through the port; d) actuating the valve to restrict the flow of fluid through the hole; e) filling the conduit with a fluid; f) inspecting the conduit for any leaks; and g) actuating the valve to permit the flow of fluid through the hole. 38. The method of claim 37, further comprising: h) removing the diaphragm from the recess; and i) positioning the sealing door in the port. 39. The method of claim 37, further comprising: h) determining fluid pressure in the body after step e).