Oatey Cleanout Plug, Recessed Head, 3. In 42744 Cleanout Plug Pipe And Test Plugs Cleanout Plug, Recessed Head, Nominal Size 3. In, Material of Construction Brass, For Use In Drain AccessCleanout Repair PlugsHold as much as 50 ft. of backpressure. Test-Tite, Plastic, Flush models are for use in cast-iron fittings where threads have been damaged. tems typically ship in 3-5 business days.