Fitting for connecting a main pipe liner to a branch conduit

A rehabilitated pipe system comprising:

• a main pipe,
• a liner installed in the main pipe, the liner having an interior,
• a branch conduit, and
• a fitting configured for connecting the branch conduit to the liner installed in a main pipe, the fitting comprising:
• a fitting body having an inner end portion and an outer end portion spaced apart along an axis and defining a passage extending through the fitting body from the inner end portion through the outer end portion, the fitting body having a circumference and being configured to be inserted into the branch conduit to position the fitting at an installed position in which the fitting connects the liner to the branch conduit and the passage provides fluid communication between the interior of the liner and the branch conduit;
• and
• a plurality of protrusions on the fitting body and projecting outward from the fitting body, the protrusions being spaced apart from each other in a circumferential direction around the fitting body, wherein the protrusions are configured to establish a mechanical connection between the fitting and the branch conduit as the fitting body is inserted into the branch conduit without rotating the fitting body a complete revolution about the axis, and wherein the mechanical connection secures the fitting body at the installed position;
• wherein the fitting is at the installed position.

A fitting for connecting a branch conduit to a liner installed in a main pipe, the fitting comprising:

• a fitting body having an inner end portion and an outer end portion spaced apart along an axis and having a substantially smooth interior surface defining a passage extending through the fitting body from the inner end portion through the outer end portion, the fitting body having a circumference and being configured to be inserted into the branch conduit to position the fitting at an installed position in which the fitting connects the liner to the branch conduit and the passage provides fluid communication between the interior of the liner and the branch conduit;
• and
• a plurality of protrusions on the fitting body and projecting outward from the fitting body, the protrusions being spaced apart from each other in a circumferential direction around the fitting body, wherein the protrusions are configured to resiliently deflect upon insertion of the fitting body into the branch conduit to bear against the branch conduit to establish a mechanical connection between the fitting and the branch conduit as the fitting body is inserted into the branch conduit without rotating the fitting body a complete revolution about the axis, and wherein the mechanical connection secures the fitting body at the installed position;
• wherein the fitting body comprises a flange section defining the inner end portion and a shaft section having a shaft section length extending from the flange section to the outer end portion;
• wherein in the installed position, a portion of the shaft section is configured to be disposed in the branch conduit and the flange section is configured to be disposed outside the branch conduit in an interior of the liner;
• wherein each of the plurality of protrusions is located along the shaft section length and defines a respective radially outermost point with respect to the axis along the shaft section length such that each of the protrusions protrudes radially outward relative to an entirety of said portion of the shaft section configured to be disposed in the branch conduit;
• wherein the radially outermost point of each protrusion is located at an axial position along the axis, wherein the axial position of each radially outermost point is substantially the same, and wherein said plurality of protrusions are the only circumferentially spaced protrusions along said portion of the shaft section configured to be disposed in and securely engage the branch conduit;
• wherein the fitting further comprises a seal extending around the shaft section and seated against the flange section.