Abstract: A leak testing device includes a generally cylindrical elongated sealing gasket which defines a recess therethrough. The gasket includes first and second end portions for receiving the respective ends of two adjacent conduits. A shoulder portion extends radially into the recess for supporting a diaphragm member thereon. The diaphragm member includes a diameter substantially corresponding to the diameter of the recess. In a preferred embodiment, the diaphragm member is made intregal with the gasket. A hole is provided in the diaphragm member which can be selectively opened or closed by a valve assembly provided on the diaphragm member to thereby permit or restrict the flow of a fluid between the two conduits.

Abstract: A plugging device for closing an opening defined by an end of a pipe with sealant comprises a cap, an extension, an inner seal, a guide, and at least one stop. The cap has an inner surface which defines a chamber adapted for retaining the sealant. The chamber is dimensioned slightly larger than the end so as to receive the end. The chamber and end define a gap therebetween. The extension has a distal end and is attached to the inner surface opposite the distal end. The inner seal is attached to the extension and sized larger than the opening. The guide is positioned forward of the inner seal and attached to the distal end. The guide is also dimensioned to be inserted into the opening. The stop is attached to the extender, and when the stop is disposed in the pipe, the stop is movable with respect to the conduit in one direction and also prevents misalignment of the cap with the pipe. A handle can also be included to allow the cap to be positioned robotically.

Abstract: Method and apparatus for dislodging a test baffle in a fluid conduit following pressure testing without permitting fluid to escape. The invention provides a device for dislodging or unseating a test baffle, for releasing a pressure within the conduit contained by the baffle, and for removing the baffle without leakage or other fluid escape. A preferred apparatus according to the invention comprises a rigid plug adapted for sealing engagement of an end of a fluid conduit such as a pipe, and a removal device adapted to pass through an aperture in said plug and to engage and dislodge a test baffle disposed within an interior of the conduit. Preferred removal devices comprises flexible lines attached to the test baffle and tools adapted to pass through the aperture and engage the test baffle.

Abstract: A tub waste overflow assembly is provided that is attachable to a tub wall by means of a threaded retaining body insertable through an overflow drain aperture in a tub wall to engage a cooperatively threaded pipe fitting on the opposite side of the tub wall. A chamfered washer is provided to cooperate with the retaining body and an annular sealing gasket to produce a fluid-tight seal on the interior surface of the tub wall and provide frictional engagement with a cover member spanning the drain aperture.

Abstract: A frangible sealing plug for pipelines comprising a unitary disc shaped fluid impermeable body having a plurality of score lines on one side, and a peripheral score line on the opposite side adjacent a peripheral sealing structure. The peripheral sealing structure abuts the end of a pipeline section. The impermeable sealing plug is preferably molded of a plastic composition. The plurality of score lines includes at least one radially disposed score line and at least one concentric score line. The frangible sealing plug is positioned in the end of a pipeline section to hold a testing fluid backpressure. After testing, the disc shaped body is separated into a plurality of pieces along the score lines by a removal device.

Abstract: A releasable plug for sealing an open end of a fluid bearing pipe having at its open end an inwardly directed flange formed upon cutting an end of said pipe; said plug including a plug body, an annular recess formed in the body which engages said flange, and sealing means which frictionally engages an inner surface of said pipe thereby providing a pressure seal for said pipe.

Abstract: An apparatus for adding coolant to a cooling system of a motor vehicle includes a cap with a resilient sleeve that expands against the inside wall of a radiator filler neck to provide an air-tight connection. A valve attached to the cap controls the flow of air and coolant through the cap. A gauge on the cap indicates the pressure inside the radiator. A venturi assembly connected to the valve provides a source of vacuum for evacuating air from the cooling system. Thereafter, coolant is drawn through the cap by the vacuum created in the system.

Abstract: A pneumatic pipe plug for pipeline tee-connections and access ports having a molded cap structure, an elastomeric inflatable body, and a sealant ring. The molded cap structure of the pneumatic pipe plug having two concentrically spaced projections which act to receive and seal the elastomeric inflatable body. The elastomeric inflatable body having a closed bottom and an open top which has a peripheral shoulder extending therefrom. The sealant ring of the pneumatic pipe plug having a threaded exterior and an interior lip which compresses the peripheral ridge of elastomeric inflatable body against the projections of the molded cap structure when the sealant ring is joined to the molded cap structure. The molded cap having an inflation device that is suitable to regulate air flow through the upper surface of the cap and into the area contained within the inner most projection of the lower molded cap.

Abstract: A pipeline plug is disclosed having an elastomeric disc-shaped sealing element provided with deforming means whereby the outside diameter of the elastomeric element is deformed to reduce its outside diameter to facilitate its insertion onto a pipeline. In another embodiment described, the plugging element and the deforming means are so arranged that when the deforming means act on the element, the latter is expanded into a sealing arrangement. The plugging elements are shown at one end of a spool assembly with resilient guide means to permit movement of the plug through a pipeline, but the plugging elements and their deforming means can also be used separately.

Abstract: A water closet fitting comprising a removable test baffle allows a water closet drain system to be tested for fluid tight integrity after the fitting has been installed in a poured, permanently set floor such as concrete. The test baffle is removably attached to the fitting, preferably by interfering fit between the test baffle and the fitting, for efficient installation, and comprises means for removing the baffle entirely from the fitting and the drain system after the completed system has been permanently installed and successfully tested. A preferred embodiment of the baffle is flexible, has a diameter greater than that of the central drain system, and comprises a central dome to enhance its pressure resistant characteristics. The flexibility of the baffle allows it to be removed through the installed drain system after the system has been tested successfully.

Abstract: An improved system for the non-destructive testing of the fluid tight integrity of an installed fluid transfer line such as a drain pipe or vent and wastewater system of a building. A removable test baffle is held in place between ends of adjacent sections of an installed fluid transfer line to isolate a portion of the line for testing. The test system comprises a baffle carriage, a removable test baffle, and a sleeve adapted to engage the outer surfaces of the adjacent sections to seal the junction and the test installation from leaking and optionally to provide one or more gaskets between the section ends and the baffle carriage. In optional preferred embodiments of the test system the baffle carriage is an integral part of the sleeve. Preferred baffles for use with the invention are flexible, of larger diameter than the fluid line, and comprise dual-gasket sealing means and means for removal of the baffles from either side of the test seal.

Abstract: A pipe leak locating system is provided including a pipe with an inlet. A plug is situated within the pipe and an air generator is mounted on the inlet of the pipe with a pressure gauge coupled therebetween for detecting the release of pressure within the pipe between the inlet and the plug.

Abstract: A temporary pipeline plug includes a cylindrical outer shaft defining an interior passage which receives and supports an interior shaft. A pair of pressure plates are adjustably supported at one end of the inner and outer shafts and captivate an expandable resilient member therebetween. The expandable member is expanded by compressive force between the pressure plates created by relative rotation of the inner shaft with respect to the outer shaft. A multiply spoked anchor is secured to the opposite end of the outer shaft and an intermediate support member is rotatably supported upon the outer shaft to provide a safety support for the pipeline plug when installed.

Abstract: An improved system for the non-destructive testing of the fluid tight integrity of an installed fluid transfer line such as a drain pipe or vent and wastewater system of a building. A removable test baffle is installed in a seat extending radially into the sidewall of a pipe or other fluid transfer line to isolate an installed portion of the fluid line for testing. The test baffle comprises a pair of gaskets to improve the effectiveness of the baffle in sealing or isolating the line and a domed central web to facilitate testing at increased pressures. The test baffle optionally further includes a lightweight, low cost ribbed construction and a means for removing the baffle from either the convex or concave side of the dome without leaving behind any portion of the baffle to impair fluid flow within the line. On removal, the baffle is flexed into a saddle shape and removed from the line without need for dismantlement of the line.

Abstract: The present invention is an enclosure for securing selective access to the hollow interior of cylindrical pipes. The preferred embodiment comprises a selectively engagable toggling mechanism contained within a cylindrical body which transmits removal forces into increased frictional removal resistance forces. Toggling cross-arms provide the frictional resistance to removal by gripping the inner wall of the pipe. The device may also include a pipe interior seal and vent.

Abstract: A removable, expansion sealing plug has an annular seal formed of an elastic material, which seal is expanded by a fruste-conical expansion member when the expansion member is drawn into a retention member, the retention member having an outer surface with screw threads, and the expansion member being rotationally fixed, but axially movable, relative to the retention member. When installed, retention member screw threads fix the plug in position and prevent forcible expulsion from the installation hole and the expansion of the seal causes compression of the seal between the wall of the installation hole and the expansion member and frictional interference between the seal and the installation hole and between the seal and the expansion member, thereby preventing the rotation of the plug within the installation hole.

Abstract: A closure for a tubular member having a first surface of a first internal diameter and a second surface of an enlarged internal diameter providing a circumferential ledge, and, in the second surface an increased internal diameter circumferential slot, the closure being formed of a cylindrical plug removably positioned within the tubular member and in engagement with the circumferential ledge and an expandable snap ring having a collapsed and an expanded condition and receivable in the expanded condition within the circumferential slot to capture the plug between the circumferential ledge and the snap ring and a keeper plate of external diameter equal the internal diameter of the snap ring when the snap ring is in its expanded condition, the keeper plate being receivable within the snap ring when said snap ring is within the circumferential slot and serving to prevent dislodgement of the snap ring.

Abstract: An apparatus for repairing and/or leakage testing of sewer pipes, in particular of connecting pipes diverging therefrom. The apparatus is constructed as a tubular member and includes an opening, wherein the apparatus can be moved in the sewer pipe. The apparatus has a bladder which can be moved out through the opening.

Abstract: The present invention provides a high pressure plug coupling for providing a quick, fluid tight connection to a fluid port having internal threads. The high pressure plug coupling includes a generally hollow, exterior sleeve, with a hollow cylindrical piston slideably disposed within the exterior sleeve. A split collet assembly is connected to an end of the piston and is moveable therewith relative to the exterior sleeve. The split collet assembly includes a distal end portion that is radially expandable and contractable, with an interior surface of the distal end portion being tapered. An expansion pin is moveably disposed within the collet assembly and the piston for expanding the distal end portion. The expansion pin includes a frustum-shaped end portion adjacent to the distal end portion, with the frustum-shaped end portion being engaged with the tapered interior surface when the distal end portion is radially expanded.

Abstract: This invention relates to a bore plug and to a bore plugging method, usually but not necessarily for tubes, and has particular (but not exclusive) application for the isolation of defective heat exchanger tubes. The bore plug comprises a sealing member and a holding member, the sealing member being adapted to span the bore, the sealing member having a longitudinal axis and an axial opening to receive the holding member, the holding member being insertable into the opening solely by axial movement. The method includes the steps of {i} pushing the sealing member axially into the bore, and {ii} pushing a holding member axially into the opening so as to urge part of the sealing member into sealing engagement with an inner surface of the bore.

Abstract: A frangible sealing disk for use downhole in combination with packer components. The sealing disk is a molded ceramic disk having a circular seating face and extending centrally through a dome-shaped seal. The seal is preferred for use in combination with a packer assembly for pressure sealing the borehole, either up hole or down, so that the seal may be broken away easily when it is desired to remove or reset the packer assembly.

Abstract: There is described an improved pipeline isolation tool for plugging a pipeline at a predetermined location, comprising a housing adapted for movement through a pipeline, the housing having first and second ends, seals disposed annularly about the housing, the seals being radially expandable into fluid sealing contact with an inner wall of the pipeline, and a plurality of braking members including grips for frictionally engaging the inner wall of said pipeline to lock the isolation tool in position against fluid pressure in the pipeline, the braking members being selectively and repetitively movable between a first position in which the grips are disengaged from the inner pipeline wall and a second position in which the grips engage the inner wall.

Abstract: A sealing apparatus for providing a sealing engagement with an internal surface of a pipe in order to plug the pipe. The apparatus has a pair of plate members. A sealing member with a pair of flanges is positioned between the pair of plate members. A rod passes through the two plate members and the sealing member. A coupling assembly is connected to one of the plate members for releasably engaging a plunger. A method for plugging a pipe including the steps of disposing the sealing assembly in a pipe; and moving one of the plate members towards the other plate members such that the pair of flanges move outwardly and towards each other to sealably engage the internal surface of the pipe to plug the same.

Abstract: An overflow system for a bathtub has an overflow port and has a drain pipe in connection with the overflow port. A flexible diaphragm is secured to and seals the port by a plate having a center opening. The diaphragm seals the overflow port when the system is being tested for leaks with pressurized fluid. Following the test, when the fluid is removed, the diaphragm is cut or slashed to open the overflow port to provide fluid flow. A cap covering the plate and the diaphragm is secured to the drain pipe and covers the plate and the diaphragm.

Abstract: The invention is directed to a plumbing tool for temporarily plugging a pipe which normally contains fluid or gas under pressure. The plumbing tool includes an elongate threaded rod having proximal and distal ends. A hollow elongate sleeve is disposed around the threaded rod. Similarly, a cylindrical gasket is disposed around the rod between the hollow sleeve and a gasket stop located at the distal end of the elongate rod. The plumbing tool further includes an arcuate handle extending proximally from the proximal end of the elongate threaded rod. The arcuate handle is configured to include a radius sufficiently great to permit valves to be telescopically communicated along the entire length of the arcuate handle and along the length of the hollow elongate sleeve.

Abstract: A corrosion-resistant test port kit is specially adapted to be retrofitted into existing duct work for use in testing or monitoring gases and vapors in an exhaust air transfer system that is designed to handle a wide range of potentially corrosive exhaust streams found in a wide variety of industrial applications. The apparatus provides the ability to install the test port kit in existing duct systems quickly and easily to monitor the gas stream without having to disassemble the duct system or interrupt its use for long periods.

Abstract: A reusable pipe closure is constructed using an O-ring end cap and split collar. In practice the end cap and O-ring are inserted over the end of a pipe, the split collar is placed over the end cap and the end of the pipe and the two halves of the split collar are closed; securely compressing the collar around the pipe.

Abstract: A novel tube plug which may be used to plug selected tubes in a heat exchanger has a cap portion for substantially closing a heat exchanger tube and a tube engaging portion depending from the cap portion, for insertion into the tube to retain the tube plug. By applying solder to the tube plug, the tube is sealed off, without providing a large solder mass which could cause damage due to thermal stresses.

Abstract: An inner diameter plug for sealing a pipe near an open end of the pipe. The plug is capable of being reused within a range of pipe inner diameter tolerances and of providing effective fluid-tight sealing over a range of internal pressures. The plug can be hand tightened and provides self-gripping and self-sealing features.

Abstract: A device for plugging a pipe includes a resilient, hollow body member that expands with the application of internally applied pressure to block the pipe. The body member has at one end a conical shaped wall with an apex that points inward. At ambient pressure, the diameter of the body member is less than the diameter of the pipe into which it is inserted. The diameter of the body member increases as the internal pressure increases, and the length of the conical shaped wall decreases.

Abstract: A method and apparatus for testing a plumbing system in a more dependable and cost-effective manner. During the rough-in plumbing phase of construction, the drain pipe leading from the plumbing system in a building to the city sewer main or main sewer line is positively sealed off by a test cap welded in the pipe at the location of the clean-out. Access to the test cap is maintained through the clean-out. Pressurizing the rough-in plumbing to test the same can then proceed knowing that if any leaks occur, they are in the branch plumbing on the building side of the test cap, and not at or in the test cap. Following successful completion of the initial test, the top-out plumbing job is completed, leaving the test cap welded in the clean-out or drain pipe. After the roof vents are in, the second test of the plumbing system is made, again knowing that if the system shows any leaks, they are the result of a failure in the plumbing work and not a failure of the test cap.

Abstract: An outer diameter plug is provided for sealing the open end of a pipe. The plug is capable of being reused on a range of pipe outer diameter tolerances and of providing effective fluid-tight sealing over a range of internal pressures. The plug is particularly suited for use in pressure testing pipes by means of pressure fluids admitted to the pipes through the plug.

Abstract: A vessel pressure testing apparatus includes a safety retainer unit. An expanding plug unit is secured within a tubular outlet pipe of the vessel with a clamping bolt extending outwardly from an expanding rubber plug member. An attachment plate is secured abutting the outlet pipe with the clamping nut bearing on and locking the plate to the pipe and plug unit. A locking plate has a central opening larger than the external diameter of the pipe, and is passed over the pipe. A loop connector has one loop passed through an opening in the attachment plate and a second loop passed through a similar opening in the locking plate. The locking plate is located with the inner end spaced axially inwardly on the pipe relative to the outer end which is connected to the locking plate. Pressure is then applied to the vessel, and if the test plug fails for any reason, the plug unit tends to move from the pipe end.

Abstract: A fluid diversion apparatus (10) comprising a structure (12) for sealing an interior surface (13) of a pipe (14), so as to stop residual water within the pipe (14) from reaching a distal free end (16) of the pipe (14). An assembly (18) is for inserting the sealing structure (12) within the pipe (14). A facility (20) is for diverting the residual water centrally through the pipe (14) away from the distal free end (16), so that a valve, male adaptor or fitting can be soldered to the distal free end (16) of the pipe (14).

Abstract: An assembly includes a quick connect cartridge which is inserted into a port of a valve or manifold in a pneumatic system for coupling external fluid lines of the system to the valve or manifold. The components of the quick connect cartridge and the O-ring seal are mounted on the tubular shank of a plug. The plug is used as a shipping pin and is also used to install the components into a port of the valve or manifold. Normally, the plug is withdrawn from the port after the components are inserted in the port. If it is desired to keep the port closed after initial installation of the components, the plug may be retained in the port until it is time to connect the port. If it is desired to leave the port permanently closed, the plug remains in place. The plug can be an open plug allowing testing of the valve in which case a dust plug is provided for shipping puposes.

Abstract: A plug for ports having a flexible handle to facilitate the removal of the plug from a port. A flange is integrally attached to an end of the plug body and extends radially outwardly from the body. One or more openings are formed in the flange which form handles concentric to the body. The openings have ends spaced from each other providing lands that attach the handles to the flange. The openings are spaced inward from the outer edges of the flange and the handles provided can be swung toward each other and grasped by a hand to pull the plug out of a port.

Abstract: An inflatable pneumatic plug useful for expediting the hydrostatic testing of bathtub and water plumbing installations. The pneumatic plug has a semi-rigid handle tube with an air valve at one end and an inflatable tube attached to its opposite end. The inflatable tube and the handle are of sufficiently small diameter to pass through the overflow drain in the bathtub, past the drain stopper assembly and into the drain trap without disassembly of the plumbing. The inflatable tube, such as a latex tube, is chosen with a length and wall thickness such that the inflatable tube is relatively stiff and will tend to deflect laterally around a solid obstacle when advanced into the plumbing rather than flattening axially. The inflatable tube is inflatable to a diameter at least five times greater than its deflated diameter for making a water-tight seal in a plumbing conduit.

Abstract: A method and apparatus for forming inspection apertures through the insulation cladding of a containment vessel by forming an opening partly through the cladding which is thereafter lined by an adhered liner. The depth of the liner is less than the thickness of the cladding, thereby precluding heat transfer thereacross. The removed plug of the insulation is then fixed by an adhesive spray about its exterior, and once cured can then be replaced into the liner to recreate substantially identical insulative qualities. On replacement, a bridging cover is adhered across the liner to maintain the weather integrity of the cladding. This cover may be removed on successive occassions to allow for repeated inspection of the vessel walls.

Abstract: Apparatus for use in capping a plumbing system vent pipe during testing of the plumbing system. The apparatus includes a capping member for capping the vent pipe which includes a mechanism responsive to force for removal of at least a portion of the capping member by an operator located remote from the plumbing system vent pipe. The plumbing system capping member is highly visible and may be removed from ground level.

Abstract: An inspection plug assembly includes an elastomeric outer sleeve which may be compressed into the skin of an insulating jacket for forming a seal between the assembly and the jacket by mechanically anchoring the assembly to the jacket, without requiring the use of adhesives. The plug includes pull tabs to facilitate removal of the plug from the sleeves. A lanyard may be attached to the plug and the jacket without disturbing the sealing function.

Abstract: The invention relates to a plug devices for sealing an open end of a pipe which is being tested for structural integrity. The plug assembly has a reduced diameter first portion which is adapted for engagement with the interior of the pipe and a second, enlarged diameter portion which houses a piston that slidably moves within the central opening of the second portion. A compressible flexible packer element mounted on the first portion is compressed by the piston of the second portion to facilitate fluid-tight engagement with the interior of the pipe. The second portion of the assembly is provided with suitable ports for admitting setting and release pressure acting on the piston. One of the plug assemblies has a transverse bore for engagement with an inlet valve for admitting pressurized fluid into the interior of the pipe.

Abstract: An apparatus is providing for signal communication between the interior and exterior of a pipeline. A fitting is secured to the external surface of a pipeline, the fitting having a branch opening therein communicating with the pipeline interior. A plug member is sealably positioned in the branch opening, the plug member having a passageway therethrough. At least one conductor is received in the plug member passageway providing an apparatus to conduct an electrical signal from within to the exterior of the pipeline. A potting compound fills the passageway surrounding the conductor to seal the conductor in the plug against the leakage of liquids or gases.

Abstract: A plumbing fitting serving both as a test closure and a trap bushing for a T-fitting. The test and trap fitting comprises a tubular member of circular cross section having an open end and an integrally closed end. The fitting can be inserted through an opening in a wall (if present) and into the intermediate port of a T-fitting constituting a pan of a soil pipe and a vent pipe assembly. The test and trap fitting has an outside diameter such that it is received in the intermediate port of the T-fitting with close tolerance, enabling a fluid-tight connection to be made in any appropriate manner such as by solvent welding. The test and trap fitting serves as a closure for the intermediate port of the T-fitting enabling pressure testing of the plumbing system, or the maintenance of head of water therein. The test and trap fitting can be cut substantially flush with the wall and serves as bushing to which a plumbing fixture trap can be connected in fluid-tight fashion by solvent welding and the like.

Abstract: A toilet flange is disclosed for mounting a toilet to a floor and for connecting the toilet to a drain pipe leading to a sewer pipe. The toilet flange has an axial bore which is initially closed at the top by an integral knock out element which seals the bore for air or water testing prior to the installation of the toilet. The knock out element when removed is larger than the lumen of the drain pipe so that it cannot fall into it.

Abstract: A device for fit testing facepiece respirators is presented. In accordance with the present invention, a testing probe is installed in the facepiece of a respirator during fit testing. In a first embodiment, the probe of this invention is installed in the front or side port of the facepiece after the filter element, valve or breathing tube assembly has been removed. The probe comprises a threaded plug adapted for installation into the front port of a respirator and a male hose connector mounted through a hole located at about the center of the plug. In a second embodiment of this invention, a fit testing probe is installed in one of the side or front ports of the facepiece respirator after the exhalation valve or filter element assembly has been removed therefrom. In this latter embodiment, the probe comprises a spool shape plug adapted for installation into the side port.

Abstract: A plumbing tool for temporarily plugging a pipe which normally contains fluid under pressure. An elongate threaded rod has proximal and distal ends. A hollow elongate sleeve is disposed around the threaded rod. A cylindrical gasket is disposed around the rod between the hollow sleeve and a gasket stop on the distal end of the rod. The stop includes a washer, keyed to the threaded rod to prevent relative rotational motion, and a nut engaged on the distal end of the threaded rod, to permit field removal of the washer and field replacement of the gasket.

Abstract: A dual purpose stopper having a deformable, resilient body resides in a branch, communicating with a pipe through an opening in the wall of the pipe. The stopper has a distendable rear portion which can be expanded radially to seal the branch, allowing removal of a mechanism used to actuate the stopper. When actuated, the stopper is shifted by the mechanism from the branch into the pipe, deforming the stopper and sealing the pipe.

Abstract: A pneumatic test plug for clean-out tees having an elastomeric inflatable body, a closed top, an inwardly tapered side wall and an open bottom end with a peripheral shoulder having a downwardly extending peripheral ridge. A molded end cap with a cylindrical wall having exteriorly disposed threads and an inwardly disposed circular retention channel or area receives a retention collar for placement within the molded end cap and between the cylindrical wall and the inflatable body bottom end. The retention collar fixes the peripheral shoulder and downwardly extending peripheral ridge in the circular retention channel or area of the end cap and compressingly holds the peripheral shoulder of the inflatable body into the end cap.

Abstract: A leak test port plug device is disclosed which includes a resilient plug having a first portion which is substantially cylindrical and a second portion which is generally conical and formed in integral one-piece relationship to the first portion. When the first portion is inserted into a port of a component to be tested and the plug is compressed, the first portion radially expands in the port and the second conical portion moves into the end of the port to effectively seal the port against fluid leakage.

Abstract: A mobile apparatus for testing the integrity of a joint between two sections of concrete pipe in a test-as-you-go method of assembling concrete pipe sections to form a continuous pipe. The apparatus includes a wheel mounted frame which carries a flexible seal used to cover the interior of the entire pipe joint to form a substantially closed annular space. That space and a connected tank provide a substantially known volume for measurement purposes. The pressure in the known volume is monitored over a set period of time to determine the integrity of the pipe joint. The apparatus is moved along the interior of the pipe to test each joint after it is assembled. A method of testing the pipe joints is also disclosed.