Patent ID: 7762282

Claim:
A closure for a plumbing cleanout, comprising: a riser pipe having an interior surface defining an interior bore and an exterior surface; a cylindrical plug having a first end positioned in the interior bore of the riser pipe, a second end, an exterior surface and means at the second end of the cylindrical plug which is adapted to limit the distance the first end of the cylindrical plug can be inserted into the interior bore of the riser pipe; and an overlying cap positioned overlying the interior bore of the riser pipe, the overlying cap having an interior surface, an “O” ring seal being provided which is adapted to seal the interior surface of the overlying cap and the exterior surface of the riser pipe to seal fluids within the riser pipe; wherein at least one set screw extends through the overlying cap into the exterior surface of the riser pipe, thereby fixing the cylindrical plug against movement as pressure increases.