Compression fittings for pipes having a range of diameters, including a support body with a central section between end sections, the central section having a smaller diameter than the end sections, with a transition surface between the central section and each end section. A gasket fits over a pipe and engages one of the support body end section end surfaces. A fitting nut is movable axially over the support body to draw the support body and the gasket together in the axial direction and bias the gasket radially inward against the pipe. A grip ring encircles the pipe at one gasket end and has a surface engaging the fitting nut whereby the fitting nut biases the grip ring radially inwardly toward the pipe. An insert adapter has a hub with a radially extending flange may block the other gasket end to load the gasket between its axial ends.

A cutting ring fitting for a thin-walled pipe, includes: a connecting body having a tapered cone; a cutting ring; a union nut which can be screwed onto the connecting body; and a reinforcing sleeve for insertion into the pipe, the reinforcing sleeve having an axial slot. A pipe includes such a cutting ring fitting, and a method mounts such a cutting ring fitting on a thin-walled pipe.

A coupling comprises an inner body having an interior bore configured to receive a tube or the like. A collar is arranged to be axially received about the inner body. The collar being configured such that when it is forced onto the inner body, it applies a circumferential compressive force to deform the body inwardly. At least one interior annular projection defines one or more annular teeth arranged such that when a tube is received in the bore and the inner body is inwardly deformed by the collar, the one or more annular teeth engage the tube to seal with it. The inner surface of the bore comprises a plurality of circumferentially arranged projections defining a series of circumferentially spaced teeth axially spaced from the at least one annular protuberance and configured to engage the tube following compression of the inner body by the collar to prevent relative rotation between the tube and the inner body.

A pipe end connector assembly and a method of mounting a pipe end connector assembly. The connector assembly may include a first connector configured to selectively mount to an outer surface of a pipe; and a second connector connected to the first connector and configured to selectively mount to the outer surface of the pipe, the first connector and the second connector being operable to apply opposing and negating axial forces to mount the connector assembly to the pipe.

A connector element is disclosed in accordance with one embodiment of the present disclosure. The connector element is for coupling a first tubular element to a second tubular element, wherein the second tubular element is having an end configuration selected from a threaded end configuration and a non-threaded plain configuration. The connector element is having a threaded element complementary to the threads of the threaded end configuration of the second tubular element, a tube lock that is co-axially arranged with respect to and disposed downstream of the threaded element for holding the second tubular element, and a guide element that is co-axially arranged with respect to and disposed down-stream of the tube lock for guiding the second tubular element.

A seal assembly has a connector body with a first section and a second section, movable relative to one another. The first section and the second section each has an open end configured for receiving the free end of a pipe. The open end of the first and second sections are each configured for sealing engagement with the free end of a respective pipe. The seal assembly is movable between a first condition, in which the second section assumes a retracted position relative to the first section, and a second condition in which the second section assumes an extended position relative to the first section. A seal member is provided for creating a seal between the first section and the second sections in said first and second conditions. First and second adaptors are provided, each for association with a respective one of said first and second sections of the connector body and configured for securing at the free end of a respective pipe. First and second mechanical interlock arrangements are provided, each for association with a respective one of said first and second adaptors, and each configured for driving the respective adaptor in the direction of the connector body.

Example aspects of a pipe fitting, a pipe fitting assembly, and a method for tightening a pipe fitting assembly are disclosed. The pipe fitting can comprise a fitting body defining an inner surface, an outer surface, a first fitting end, and an second fitting end, the inner surface defining a channel extending from the first fitting end to the second fitting end, a portion of the inner surface defining a tapered region tapering towards the first fitting end; and an engagement assembly comprising a metal grip ring received in the channel, the metal grip ring defining a ring body and a plurality of teeth extending inward from the ring body, the engagement assembly configured to slide along the tapered region.

A no-crimp valve assembly employs a fitting which has an enlarged outer portion and a coaxial inner portion of reduced diameter. An axial groove is formed between the outer portion and the inner portion for receiving the end of a polymer pipe. A nut retainably receives a split ferrule. The split ferrule has a serrated inner surface. The nut is threaded to the outer threaded surface of the outer portion and the ferrule is compressed against the outer surface adjacent the end of the pipe to form a fluid tight connection and the inner surface of the pipe engages the reduced surface of the inner portion. In some embodiments, the inner portion carries one or more sealing rings or has a serrated or stepped inner surface which engages the inside surface of the pipe.

Provided is a joint structure with which a pipe can be disconnected without moving the pipe in a longitudinal direction thereof, even if the pipe is not machined. A first sleeve 2 has an inner cavity into which a pipe 100 is inserted, and one end part of the first sleeve comes into contact with a joint body 1. A second sleeve 3 has a hole into which the pipe 100 is inserted, and one end part of the second sleeve comes into contact with the other end part of the first sleeve. A nut 4 covers one end part of the joint body 1, the first sleeve 2, and the second sleeve 3, and the nut is threaded onto the joint body in a state of pressing against the surface of the second sleeve 3 on the side opposite from the first sleeve 2.

Provided is a joint structure with which a pipe can be disconnected without moving the pipe in a longitudinal direction thereof, even if the pipe is not machined. A first sleeve 2 has an inner cavity into which a pipe 100 is inserted, and one end part of the first sleeve comes into contact with a joint body 1. A second sleeve 3 has a hole into which the pipe 100 is inserted, and one end part of the second sleeve comes into contact with the other end part of the first sleeve. A nut 4 covers one end part of the joint body 1, the first sleeve 2, and the second sleeve 3, and the nut is threaded onto the joint body in a state of pressing against the surface of the second sleeve 3 on the side opposite from the first sleeve 2.