These plugs come with a hollow stem Hollow stem can be used as a fill or drain pipe. Most importantly these are easy to use plugs because you just hand tighten the wing nut to install. Turning the wing nut expands the rubber ring tightly against the inside of the pipe. Hand tightening is usually adequate in smaller sizes, but a wrench can be used on larger sizes to give a better seal. The large wing nut allows easy installation. Can be used as a blocking plug or bypass plug, making them even more useful and versatile.
Please click on the table below for detailed specifications