Test-Tite® Test Plug, Mechanical Cleanout, 4 in Pipe
Clear cap provides a "window" to monitor the test media as it drains Expandable rubber gasket provides air and water tight seal Durable design plated steel parts will not rust No tools, hoses, or gauges are required for installation Hand tighten in seconds Available in 2, 3, 4, and 6-inch diameters 6 inversion contains drain line with key to control drainage of the test media