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The OATEY LTB3 is a 3-inch long test ball plug designed for waste stack testing in drain, waste, and vent (DWV) piping systems. It seals both the rise and the run simultaneously, allowing the technician to pressurize the system and confirm integrity. The plug can also be positioned to seal a wye fitting, making it suitable for sewer air testing. Plumbers and drain technicians use this plug during rough-in inspections and final DWV pressure tests on residential and light commercial projects.
The LTB3 is used in 3-inch DWV piping during new construction and retrofit installations. It is appropriate for waste stack testing scenarios where both horizontal and vertical runs must be isolated at the same time. The plug is also used when performing sewer air tests through wye fittings, a common requirement during municipal inspection sign-off on new drain systems.
Designed as an OEM-style replacement and standard test accessory for use in 3-inch drain, waste, and vent piping systems.
Installation is performed by licensed plumbers during DWV system testing, typically in accordance with the International Plumbing Code (IPC) or applicable local code. Always depressurize and drain the system before inserting or removing the test plug. Do not exceed the pressure rating of the plug or the piping system under test. Inspect the plug body and inflation valve for damage before each use.
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