A drain trap with clean out for the tube and plumbing industry: May be stud mounted; installed inside or outside a wall. The drain trap (2) has tree apertures; the first aperture (3a) permits installation of a tube to a sink, fixture or drain; the second aperture (3b) is a clean out access and may be sealed with a cap (4a). When the cap (4a) is removed, user has access to the insides of the trap (2) and/or tube. This cap (4a) includes a device (5) for screening and/or cleaning the insides of the drain or tube and may be a detachable brush made of nylon bristle materials. The third aperture (3c) permits the trap to be connected to the waste line. A partition element (6) may prevent sewer gas from leaking and passing through. When installed inside a wall, it shall include a wall cover plate (1) and a screw (8a).
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