Pipe coupling

A pipe coupling for connecting adjacent pipes, comprising:

• a first end of a body comprising a first connection type;
• a second end of a body opposite from, integral with, and seamless with the first end and comprising a second connection type, wherein the second connection type comprises:
• a male end having a male leading edge and an exterior surface, the exterior surface having a circumference, wherein at least one exterior circumferential groove is defined on the exterior surface of the male end being sized and positioned to receive therein a plurality of rigid fingers,
• wherein the male end is configured to be received by a third connection type on an adjacent pipe, the third connection type comprising:
• a female end with an interior surface, a thickness, and a female leading edge terminating the female end of the coupling, the interior surface of the female end defining a receiving chamber with an interior diameter larger than the diameter of the exterior of the male end;
• at least one interior circumferential groove formed in the interior surface of the female end;
• a band seated within the at least one circumferential groove;
• and
• a plurality of rigid fingers formed continuously with and extending from the band into the receiving chamber at an acute angle directed away from the female leading edge, the plurality of rigid fingers being displaceable to be received in a corresponding exterior circumferential groove of the male end.

A method of coupling adjacent pipes, comprising:

• providing a first connection type on one end of a pipe or a pipe coupling, comprising:
• a female end with an interior surface, a thickness, and a female leading edge terminating the female end of the coupling, the interior surface of the female end defining a receiving chamber;
• wherein the female end defines a sight window comprising an opening extending through the thickness of the female end and configured to permit viewing of the position of a male end of an adjacent pipe within the receiving chamber;
• providing a second connection type on one end that is the other of a pipe or a pipe coupling, comprising a male end having a male leading edge and an exterior surface, the exterior surface having a circumference smaller in diameter than an inside diameter of the receiving chamber of the female end, wherein at least one exterior circumferential groove is defined on the exterior surface of the male end being sized and positioned to receive therein the plurality of rigid fingers extending from a corresponding at least one interior first circumferential groove in a female end of an adjacent pipe configured as the second joint type, wherein the male end exterior surface includes an indication that when viewed through the sight window indicates that the male end has been fully inserted into the female end,
• the method comprising:
• inserting the male end into the female end;
• and
• continuing such insertion until the indication on the exterior surface of the male pipe can be viewed through the sight window.