www.phcppros.com/articles/12670-cherne-mechanical-cleanout-plugs

Oatey Cherne Mechanical Cleanout Plugs
January 14, 2021
Cherne’s new Mechanical Cleanout Plugs make it simple to test a DWV system. Available in 2-inch, 3-inch or 4-inch configurations, Cherne Mechanical Cleanout Plugs are built for quick and easy mechanical operation. The plug’s two-stage locking mechanism locks firmly in for both test and drain positions, allowing for high-pressure testing up to 150 ft. head/65 psi/15 floors (at 10 ft. head per floor). Built with durable and replaceable rubber pads, the plugs fit PVC, ABS and cast-iron cleanout tees. They can be installed or removed in seconds without requiring any tools, and no backsplash draining will occur.
Oatey