Patent ID: 7621002

Claim:
A system for draining liquids and/or light solids comprising: a first flange comprising a lip; a second flange comprising: an inner wall member that extends up to a top position wherein said inner wall member of said second flange is sized so that said top position of said inner wall member sits below said lip extending out from said outer wall member of said second flange; an outer wall member, whereby a lip extends out from said outer wall member; and an inner chamber located between said outer wall member and said inner wall member, wherein said first flange and said second flange are sized so that said first flange fits in said second flange; and a drainage pipe, wherein said second flange is configured to sit inside of said drainage pipe and wherein said second flange is installed into said drainage pipe and said first flange is installed into said second flange; a reshaped floor wherein said reshaped floor is configured so that said reshaped floor declines towards said drainage pipe; and whereby said first flange is installed into said second flange at an elevated position so that said lip of said first flange is spaced radially above said lip extending out from said outer wall member of said second flange creating a gap existing underneath said lip of said first flange and above said lip extending out from said outer wall member of said second flange.