8 To 12 Expansion Plugs | McMaster-Carr

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Expansion Plug Type

Deflated Diameter

Body Texture

Maximum Water Back Pressure

Less than 50 ft. of head

Sealing Location

Deflated Height

Material

Finish

Eyebolt Finish

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

Required Inflation Pressure

Minimum Temperature

With Bypass

Maximum Pressure

Less than 1,000 psi

Maximum Temperature

Less than 150° F

Seal Material

Natural Rubber

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

REACH

RoHS

Maximum Air Back Pressure

Performance

Fitting Connection

Gender

5 Products

Air-Inflatable Plugs

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.

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.

With Zinc-Plated Steel Eyebolt


Ribbed Body	Smooth Body

Ribbed Body—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.

Maximum Air Back Pressure—Maximum air back pressure is the amount of pressure a plug can withstand without moving.

Maximum Water Back Pressure—Maximum water back pressure refers to the pressure resulting from the height of the water above the plug.

For Pipe		Deflated		Max. Back Pressure
Size	ID	Dia.	Ht.	Air, psi	Water, ft. of head	Req. Inflation Pressure, psi	Temp. Range, ° F	Seal Material	Body Texture		Each
8 to 12	7.00" to 12.25"	6 3/4"	16"	11	25	20	-20 to 125	Natural Rubber	Ribbed	3058K27	0000000
8 to 12	7.50" to 12.25"	6 3/4"	19 7/8"	15	35	45	0 to 125	Natural Rubber	Smooth	3058K32	000000

Remote-Access Air-Inflatable Plugs

Plug underground sewage lines, water supply lines, and other pipe that’s hard to reach. These plugs attach to a 6-ft. extension pole with an adapter (both sold separately) so you can place them in confined spaces from a distance. Before placing them in your line, connect them to your air compressor with a hose to inflate them remotely. Also known as pneumatic plugs, they’ll seal wide and out-of-round pipe. Since they can lose pressure over time, they’re intended for temporary seals. Use them in lower-pressure applications than water-inflatable plugs.

Maximum Air Back Pressure—Maximum air back pressure is the amount of pressure a plug can withstand without moving.

Maximum Water Back Pressure—Maximum water back pressure refers to the pressure resulting from the height of the water above the plug.

For Pipe		Deflated		Max. Back Pressure			Connection				Material
Size	ID	Dia.	Ht.	Air, psi	Water, ft. of head	Req. Inflation Pressure, psi	Pipe Size	Thread Type	Gender	Temp. Range, ° F	Seal	Eyebolt	Features		Each



	8 to 12	8.00" to 12.64"	6"	19"	13	30	25	1 1/2	NPSM	Female	35 to 125	Natural Rubber	Zinc-Plated Steel	Adjustable-Angle Connector	6578N12	0000000

Accessories for Expansion Plugs

Adapters

Adapters thread into a connector on the end of the plug. When installing the plug, adjust the adapter’s angle using the connector’s pull pin.

	Thread
Pipe Size	Type	Gender	Material		Each
1 1/2	NPSM	Male	Aluminum	6578N13	0000000