Patent ID: 8771505

Claim:
A trap for a catch basin, and means for mounting said trap to a catch basin wall, comprising: a hollow trap body having a front wall and rear wall, and side walls joining said front and rear walls, said trap body having a first aperture near the top of its front wall, allignable with an outlet of said catch basin, and a second aperture at a lower level on said trap body than said first aperture; a mounting plate secured to the front wall of said trap body, and having an aperture allignable with the first aperture of said trap body; a retainer plate onto which said mounting plate can be mounted, said retainer plate having an aperture allignable with the aperture on said mounting plate; an adaptor connected to said retainer plate, said adaptor comprising a curved panel having a radius of curvature selected to match the radius of curvature of the inside surface of catch basin, and a cylindrical collar extending rearwardly from said curved panel, to the aperture in a retaining plate, said collar being welded around its perimeter to the inner edge of said aperture in said retaining plate; wherein said mounting plate has side edges that converge slightly from top to bottom, and said retainer plate has a wide channel formed in its outer surface to accommodate said mounting plate, and wherein the side edges of said mounting plate and the inner edges of said channel formed in said retainer plate have complementary shaped profiles, whereby said mounting plate can frictionally engage said channel of retainer plate to remain attached thereto.