Use the bypass tube on these plugs to add air, water, and other fluid to your pipeline or to relieve pressure while testing. The seal expands to temporarily close off pipe openings. Maximum air back pressure is the amount of pressure a plug can withstand without moving. Maximum water back pressure refers to the pressure resulting from the height of the water above the plug.

For Styles A-E and H-L, twist the wing nut to expand the seal.

Styles E and F have a barbed bypass for quick connections to tubing.

For Styles F and G, twist the easy-grip T-handle to expand the seal.

Styles G, J, and K have a Schrader valve bypass. An internal spring holds the valve shut until you depress the pin, giving you control over air flow.

Conform to wide and out-of-round pipes with these inflatable plugs. Also known as pneumatic plugs, they're designed for temporary seals since they can lose pressure over time. They’re better for lower-pressure applications than water-inflatable plugs. Inflate them with a hand pump; an air compressor may overinflate the plug and cause damage.

Maximum air back pressure is the amount of pressure a plug can withstand without moving. Maximum water back pressure refers to the pressure resulting from the height of the water above the plug.

Plugs with a chain or eyebolt can be tethered through either so they don't get lost or stuck in your pipes during installation. For easy removal once testing is complete, pull on your tether.

Plugs with a natural rubber sleeve are protected from debris and sharp objects in your pipe, as well as rough pipe walls. This extends the plug’s life and ensures the seal stays intact.

Plugs with a canvas sleeve keep gas, odor, and debris from leaking out through the seal. This makes them good for high-temperature applications, such as in pipe that’s being welded. The sleeve also protects against scrapes from rough pipe walls. Use the loops on the outside to route hose through your pipe to vent while welding, or to connect lines for pulling these plugs through your pipe.

Plugs with a ribbed texture have better traction against pipe walls than plugs with a smooth texture. When sealing oily or polished walls, they’ll resist slipping.

Plugs with a pressure-relief valve release excess pressure to reduce the risk of overinflating and rupturing.