Air Test Plugs | McMaster-Carr

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Pipe Size

Expansion Plug Type

For Pipe ID

Sealing Location

Maximum Air Back Pressure

Less than 10 psi

10 psi to 24 psi

25 psi to 49 psi

50 psi to 99 psi

100 psi or greater

Material

Stainless Steel

Plate Material

Stainless Steel

Deflated Diameter

Maximum Temperature

Less than 150° F

150° F to 199° F

200° F to 224° F

225° F or greater

Handle Material

Stainless Steel

Thread Type

Maximum Water Back Pressure

Less than 50 ft. of head

50 ft. of head to 99 ft. of head

100 ft. of head to 199 ft. of head

200 ft. of head to 249 ft. of head

250 ft. of head or greater

Fitting Type

With Bypass

Maximum Pressure

Less than 250 psi

250 psi to 499 psi

500 psi to 999 psi

1,000 psi to 1,999 psi

2,000 psi or greater

Overall Height

Seal Material

Minimum Temperature

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

REACH

DFARS Specialty Metals

Export Control Classification Number (ECCN)

RoHS

Compliant with Exemptions

For Use With

Hydraulic Fluid

Hydraulic Fluid (Petroleum Based)

Height

Shape

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346 Products

Expansion Plugs

Air-Inflatable Plugs

Air-Inflatable Plugs

Temporarily seal wide and out-of-round pipes

Expansion Plugs with Bypass

Expansion Plugs with Bypass

Use the bypass tube to add fluid to pipelines or to reduce pressure

Air-Inflatable Plugs with Bypass

Air-Inflatable Plugs with Bypass

Temporarily seal wide and out-of-round pipes, with a bypass tube to add air and fluid

Wing-Nut Expansion Plugs

Wing-Nut Expansion Plugs

Twist the wing nut to expand the seal without needing tools

Long-Reach Hex-Nut Expansion Plugs with Bypass

Long-Reach Hex-Nut Expansion Plugs with Bypass

Use the bypass tube to add air and fluid to pipelines or to reduce pressure

Air- and Water-Inflatable Plugs

Air- and Water-Inflatable Plugs

Fit into tight pipe joints with our most flexible expansion plugs

Hex-Nut Expansion Plugs

Hex-Nut Expansion Plugs

Install with a nutdriver for a tighter seal than hand-tightened nuts

Quick-Snap Expansion Plugs

Quick-Snap Expansion Plugs

Turn the handle to expand the seal, then snap it down for fast installation

T-Handle Expansion Plugs

T-Handle Expansion Plugs

Easier to grip and twist than wing nuts, especially when wearing gloves

Remote-Access Air-Inflatable Plugs

Remote-Access Air-Inflatable Plugs

Plug pipe that’s hard to reach, such as underground sewage lines

Long-Reach Wing-Nut Expansion Plugs

Long-Reach Wing-Nut Expansion Plugs

Insert deep within your pipe to seal it off from the inside

Air-Inflatable Plugs for Tee Connections

Air-Inflatable Plugs for Tee Connections

Often used for plumbing tests, thread into tees and inflate to block flow

Square-Head Expansion Plugs

Square-Head Expansion Plugs

Turn the square head into the sealing ring to close off pipelines

Air- and Water-Inflatable Plugs for Wye-Joints

Air- and Water-Inflatable Plugs for Wye-Joints

Extra long to seal off two pipes in a wye-joint at the same time

Expansion Plugs for Cleanout Tees

Expansion Plugs for Cleanout Tees

No need to inflate with an air compressor or hand pump

Other Products

Pressure Test Fittings

Pressure Test Fittings

Create a temporary connection point for gauges and other testing equipment

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)