Patent ID: 7871109

Claim:
A drain basin comprising: a) a basin having basin walls and a cavity therein; b) a sleeve coupled to one of the basin walls and in communication with the cavity; c) the sleeve having a free end and a fixed end and an inside and an outside, the fixed end coupled to the basin, the sleeve having a central axis that extends between the free end and the fixed end, the sleeve having ribs on the inside and the outside, the ribs oriented with a central axis of the sleeve, the ribs spaced circumferentially about the sleeve, the sleeve having an inside diameter that decreases toward the fixed end, the sleeve inside diameter structured and arranged to receive the outside of a small pipe, the sleeve having an outside diameter that increases toward the fixed end, the sleeve outside diameter structured and arranged to receive the inside of a larger pipe, d) a finger having a protrusion that protrudes radially from the sleeve, the finger being flexible so as to move the protrusion radially in and out, the finger and protrusion structured and arranged to couple a corrugated pipe to the sleeve; wherein the inner ribs comprise inner projections, the inner ribs each having a first end and a second end, with the first end being between the sleeve free end and the rib second end, the rib first end being rounded; wherein the outer ribs comprise outer projections, the outer ribs comprising a sloped surface that is sloped toward the central axis in the direction of the sleeve free end; wherein the at least one of the ribs comprise projections, each of the projections comprising first and second steps, with the second step projecting radially further than the first step; wherein at least one of the outer ribs has a first end portion and a second end portion, with the second end portion located between the sleeve fixed end and the at least one outer rib first end portion, the at least one outer rib having a second projection extending radially out and located at the at least one outer rib second end portion, the second projection forming a fixed catch for corrugated pipe, the second projection having a radius where the second projection extends from the at least one outer rib such that when a pipe is fitted onto the sleeve, the pipe encounters the radius before encountering the remainder of the second projection; wherein the finger protrusion is a first protrusion that protrudes radially in, the finger protrusion further comprising a second protrusion that protrudes radially out.