McMaster-Carr logo
    Filter by
    Sealing Location
    Bypass Connection Port
    Bypass Thread Type
    Industrial Info Compare
    Seal Material
    Industrial Info Compare
    Bypass Gender
    U.S.–Mexico–Canada Agreement (USMCA) Qualifying
    Bypass Cap Material
    Export Control Classification Number (ECCN)
    Industrial Info Snippet
    DFARS Specialty Metals
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    68 Products

    Expansion Plugs with Bypass

    Image of Product. Front orientation. Expansion Plugs. Expansion Plugs with Bypass, Style A.
    Image of Product. Front orientation. Expansion Plugs. Expansion Plugs with Bypass, Style B.
    Image of Product. Front orientation. Expansion Plugs. Expansion Plugs with Bypass, Style C.

    Style A

    Style B

    Style C

    Image of Product. Front orientation. Expansion Plugs. Expansion Plugs with Bypass, Style D.
    Image of Product. Front orientation. Expansion Plugs. Expansion Plugs with Bypass, Style E.
    Image of Product. Front orientation. Expansion Plugs. Expansion Plugs with Bypass, Style F.

    Style D

    Style E

    Style F

    Image of Product. Front orientation. Expansion Plugs. Expansion Plugs with Bypass, Style G.
    Image of Product. Front orientation. Expansion Plugs. Expansion Plugs with Bypass, Style H.
    Image of Product. Front orientation. Expansion Plugs. Expansion Plugs with Bypass, Style J.

    Style G

    Style H

    Style J

    Image of Product. Bottom orientation. Expansion Plugs. Expansion Plugs with Bypass, Style K.
    Image of Product. Bottom orientation. Expansion Plugs. Expansion Plugs with Bypass, Style L.

    Style K

    Style L

    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.
    Style A—For Style A, twist the wing nut to expand the seal. They have an NPS threaded bypass for routing moderately pressurized fluids.
    Style B—For Style B, twist the wing nut to expand the seal. They have an NPS threaded bypass for routing moderately pressurized fluids.
    Style C—For Style C, twist the wing nut to expand the seal. They have an NPT threaded bypass for making leak-tight connections.
    Style D—For Style D, twist the wing nut to expand the seal. They have an NPT threaded bypass for making leak-tight connections.
    Style E—For Style E, twist the wing nut to expand the seal. They have a barbed bypass for quick connections to tubing.
    Style F—For Style F, twist the easy-grip T-handle to expand the seal. They have a barbed bypass for quick connections to tubing.
    Style G—For Style G, twist the easy-grip T-handle to expand the seal. They have a Schrader valve bypass. An internal spring holds the valve shut until you depress the pin, giving you control over air flow.
    Style H—For Style H, twist the wing nut to expand the seal. They have a bypass with BSPP threads, also known as G threads, for making leak-tight connections.
    Style J—For Style J, twist the wing nut to expand the seal. They have a Schrader valve bypass. An internal spring holds the valve shut until you depress the pin, giving you control over air flow.
    Style K—For Style K, twist the wing nut to expand the seal. They have a Schrader valve bypass. An internal spring holds the valve shut until you depress the pin, giving you control over air flow.
    Style L—For Style L, twist the wing nut to expand the seal. They have a GHT bypass that connects to standard garden hoses. Ideal for pipe cleanout, they allow for easy, controlled drainage.
    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
    Max. Back
    Pressure
    Material
    Bypass
    Size
    ID
    Air, psi
    Water, ft.
    of head
    Overall
    Ht.
    Temp. Range,
    ° F
    Seal
    Bypass
    Cap
    Hose
    Size
    Pipe
    Size
    Thread
    Type
    Thread
    Size
    Gender
    For Tube
    ID
    Connection
    Each
    Style A
     
    Aluminum Stem
    1 1/2
    		1.53" to 2.25"1252888 1/4"-20 to 170Natural Rubber
    		Metal—3/8
    		NPS
    		—Male——2602K21000000
    2
    		1.79" to 2.38"1252888 1/4"-20 to 170Natural Rubber
    		Metal—3/8
    		NPS
    		—Male——2602K2200000
    3
    		2.77" to 3.25"1252888 1/4"-20 to 170Natural Rubber
    		Metal—3/8
    		NPS
    		—Male——2602K2400000
    4
    		3.85" to 4.25"35818 1/4"-20 to 170Natural Rubber
    		Metal—1/2
    		NPS
    		—Male——2602K2500000
     
    Style B
     
    Steel Stem
    6
    		5.80" to 6.50"204612"35 to 210Natural Rubber
    		Metal—1/2
    		NPS
    		—Male——2602K16000000
     
    Style C
     
    Iron Stem
    1/2
    		0.47" to 0.50"Not Rated464 1/4"30 to 150Natural Rubber
    		Metal—1/16
    		NPT
    		—Male——2644K1500000
    3/4
    		0.72" to 0.75"Not Rated465 1/8"30 to 150Natural Rubber
    		Metal—1/8
    		NPT
    		—Male——2644K1600000
    1
    		0.97" to 1.00"Not Rated465"30 to 150Natural Rubber
    		Metal—1/4
    		NPT
    		—Male——2644K1800000
    2
    		1.75" to 2.00"Not Rated3410 3/8"30 to 150Natural Rubber
    		Metal—1/2
    		NPT
    		—Male——2644K2100000
    3
    		2.75" to 3.00"Not Rated3410 1/2"30 to 150Natural Rubber
    		Metal—1/2
    		NPT
    		—Male——2644K2200000
    4
    		3.63" to 4.00"Not Rated2310 1/8"30 to 150Natural Rubber
    		Metal—1/2
    		NPT
    		—Male——2644K2300000
    5
    		4.50" to 5.00"Not Rated2312 5/8"30 to 150Natural Rubber
    		Metal—1/2
    		NPT
    		—Male——2644K2400000
    6
    		5.50" to 6.00"Not Rated2312 1/2"30 to 150Natural Rubber
    		Metal—1/2
    		NPT
    		—Male——2644K2500000
    8
    		7.50" to 8.00"Not Rated414 3/4"30 to 150Natural Rubber
    		Metal—1/2
    		NPT
    		—Male——2644K2600000
    10
    		9.50" to 10.00"Not Rated414 7/8"30 to 150Natural Rubber
    		Metal—1/2
    		NPT
    		—Male——2644K31000000
    12
    		11.50" to 12.00"Not Rated414 5/8"30 to 150Natural Rubber
    		Metal—1
    		NPT
    		—Male——2644K32000000
     
    Style D
     
    Plastic Stem
    1 1/2
    		1.42" to 1.93"501154 1/2"-40 to 180Natural Rubber
    		Plastic—1/2
    		NPT
    		—Male——2566K3500000
    2
    		1.93" to 2.36"40924 1/2"-40 to 180Natural Rubber
    		Plastic—1/2
    		NPT
    		—Male——2566K3600000
    2 1/2
    		2.40" to 2.76"30694 1/2"-40 to 180Natural Rubber
    		Plastic—1/2
    		NPT
    		—Male——2566K3700000
    3
    		2.87" to 3.31"15344 1/2"-40 to 180Natural Rubber
    		Plastic—1/2
    		NPT
    		—Male——2566K3800000
    4
    		3.54" to 4.25"15344 1/2"-40 to 180Natural Rubber
    		Plastic—1/2
    		NPT
    		—Male——2566K3900000
    5
    		4.72" to 5.37"12274 1/2"-40 to 180Natural Rubber
    		Plastic—1/2
    		NPT
    		—Male——2566K4100000
    6
    		5.50" to 6.29"10234 1/2"-40 to 180Natural Rubber
    		Plastic—1/2
    		NPT
    		—Male——2566K4200000
     
    Style E
     
    Stainless Steel Stem
    1/2
    		0.48" to 0.53"10243 1/2"-40 to 250Neoprene
    		——————1/4"Barbed
    		2516K31000000
    5/8
    		0.60" to 0.67"10243 1/2"-40 to 250Neoprene
    		——————1/4"Barbed
    		2516K32000000
    3/4
    		0.72" to 0.79"10243 1/2"-40 to 250Neoprene
    		——————1/4"Barbed
    		2516K33000000
    7/8
    		0.81" to 0.89"10243 1/2"-40 to 250Neoprene
    		——————1/4"Barbed
    		2516K34000000
     
    Style F
     
    Stainless Steel Stem
    1
    		0.94" to 1.03"10244"-40 to 250Neoprene
    		——————1/4"Barbed
    		2516K35000000
    1 1/81.06" to 1.17"5124"-40 to 250Neoprene
    		——————1/4"Barbed
    		2516K36000000
    1 1/4
    		1.21" to 1.33"5124"-40 to 250Neoprene
    		——————1/4"Barbed
    		2516K37000000
    1 1/2
    		1.44" to 1.58"5124"-40 to 250Neoprene
    		——————1/4"Barbed
    		2516K39000000
    1 3/41.70" to 1.87"5124"-40 to 250Neoprene
    		——————1/4"Barbed
    		2516K42000000
    2
    		1.92" to 2.14"5124"-40 to 250Neoprene
    		——————1/4"Barbed
    		2516K44000000
    —1.32" to 1.45"5124"-40 to 250Neoprene
    		——————1/4"Barbed
    		2516K38000000
     
    Style G
     
    Zinc-Plated Steel Stem
    1
    		0.94" to 1.03"10233 3/4"-40 to 210Neoprene
    		Plastic——Schrader
    		0.305"-32
    		———5055N113000000
    1 1/2
    		1.44" to 1.58"10234"-40 to 210Neoprene
    		Plastic——Schrader
    		0.305"-32
    		———5055N117000000
    2 1/2
    		2.44" to 2.71"5124 15/16"-40 to 210Neoprene
    		Plastic——Schrader
    		0.305"-32
    		———5055N124000000
     
    Style H
     
    Plastic Stem
    1/2
    		0.49" to 0.60"1002312 15/16"-40 to 180Natural Rubber
    		Plastic—1/8
    		BSPP
    		—Male——2566K1100000
    3/4
    		0.74" to 0.90"1002312 15/16"-40 to 180Natural Rubber
    		Plastic—1/8
    		BSPP
    		—Male——2566K1200000
    1
    		0.98" to 1.20"1002312 15/16"-40 to 180Natural Rubber
    		Plastic—1/8
    		BSPP
    		—Male——2566K1300000
    1 1/4
    		1.23" to 1.45"501152 15/16"-40 to 180Natural Rubber
    		Plastic—1/8
    		BSPP
    		—Male——2566K1400000
     
    Style J
     
    Zinc-Plated Steel Stem
    3/4
    		0.72" to 0.79"10233 7/16"-40 to 210Neoprene
    		Plastic——Schrader
    		0.305"-32
    		———5055N111000000
    7/8
    		0.81" to 0.89"10233 5/8"-40 to 210Neoprene
    		Plastic——Schrader
    		0.305"-32
    		———5055N112000000
     
    Style K
     
    Plastic Stem
    1 1/2
    		1.50" to 1.71"40923 3/4"—PVC
    		Plastic——Schrader
    		0.305"-32
    		———2566K6100000
    2
    		1.86" to 2.06"30693 3/4"—PVC
    		Plastic——Schrader
    		0.305"-32
    		———2566K6200000
    3
    		2.84" to 3.09"20463 3/4"—PVC
    		Plastic——Schrader
    		0.305"-32
    		———2566K6300000
    4
    		3.89" to 4.15"10233 3/4"—PVC
    		Plastic——Schrader
    		0.305"-32
    		———2566K6400000
     
    Style L
     
    Plastic Stem
    1 1/2
    		1.50" to 1.71"40923 3/4"—PVC
    		Plastic3/4—GHT
    		—Male——2566K510000
    2
    		1.86" to 2.06"30693 3/4"—PVC
    		Plastic3/4—GHT
    		—Male——2566K520000
    3
    		2.84" to 3.09"20463 3/4"—PVC
    		Plastic3/4—GHT
    		—Male——2566K530000
    4
    		3.89" to 4.15"10233 3/4"—PVC
    		Plastic3/4—GHT
    		—Male——2566K540000
     

    Air-Inflatable Plugs with Bypass

    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. Use the bypass tube on these plugs to add air, water, and other fluid to your pipeline or to relieve pressure while testing.
    Inflate with a hand pump (sold separately); an air compressor may overinflate the plug and cause damage. Tether the plugs using either the eyebolt or chain/ring so they don't get lost or stuck in your pipes during installation. Pull on the tether for quick and easy removal once testing is complete.
    With Zinc-Plated Steel Chain/Ring
    Image of Product. Front orientation. Expansion Plugs. Air-Inflatable Plugs with Bypass, With Zinc-Plated Steel Chain/Ring.
    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
    Bypass
    Size
    ID
    Dia.
    Ht.
    Chain Lg.,
    ft.
    Air,
    psi
    Water, ft.
    of head
    Req. Inflation
    Pressure, psi
    Pipe
    Size
    Thread
    Type
    Gender
    Temp. Range,
    ° F
    Seal Material
    Each
    1 1/2
    		1.49" to 1.88"1 3/8"3 13/16"12250401/4
    		NPT
    		Male-20 to 125Natural Rubber
    		2580K230000000
    2
    		1.88" to 2.25"1 3/4"6"12250401/8
    		NPT
    		Female-20 to 125Natural Rubber
    		2580K25000000
    3
    		2.62" to 3.25"2 1/2"8"12250401/2
    		NPT
    		Female-20 to 125Natural Rubber
    		2580K27000000
    With Zinc-Plated Steel Eyebolt
    Image of Product. Front orientation. Expansion Plugs. Air-Inflatable Plugs with Bypass, With Zinc-Plated Steel Eyebolt.
    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
    Bypass
    Size
    ID
    Dia.
    Ht.
    Air,
    psi
    Water, ft.
    of head
    Req. Inflation
    Pressure, psi
    Pipe
    Size
    Thread
    Type
    Gender
    Temp. Range,
    ° F
    Seal Material
    Each
    4
    		3.25" to 4.25"3 1/8"8"2250403/4
    		NPT
    		Female-20 to 125Natural Rubber
    		2580K210000000
    6
    		4.50" to 6.25"4 1/2"7"1330351 1/2
    		NPT
    		Female-20 to 125Natural Rubber
    		2580K11000000
    8
    		7.00" to 8.25"6 3/4"10"1330353
    		NPT
    		Female-20 to 125Natural Rubber
    		2580K12000000
    10
    		9.00" to 10.25"8 3/4"11 3/4"1330353
    		NPT
    		Female-20 to 125Natural Rubber
    		2580K13000000
    12
    		10.50" to 12.25"10 1/4"13 3/4"1330353
    		NPT
    		Female-20 to 125Natural Rubber
    		2580K14000000
    12 to 2411.25" to 24.00"11"37"1330453
    		NPT
    		Male-20 to 125Natural Rubber
    		2580K31300000000
    1614.00" to 16.00"13 3/4"19 3/4"1330353
    		NPT
    		Female-20 to 125Natural Rubber
    		2580K29000000

    Long-Reach Hex-Nut Expansion Plugs with Bypass

    Image of Product. Front orientation. Expansion Plugs. Long-Reach Hex-Nut Expansion Plugs with Bypass.
    Plug your pipe from the inside. Insert these expansion plugs deep into your pipe, and then tighten the nut on the stem. Use the bypass tube to add air, water, and fluid or relieve back pressure.
    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
    Max. Back
    Pressure
    Bypass
    Size
    ID
    Air,
    psi
    Water, ft.
    of head
    Overall
    Ht.
    Temp. Range,
    ° F
    Seal
    Material
    Pipe
    Size
    Thread
    Type
    Gender
    Each
     
    Zinc-Plated Steel Stem
    1/2
    		0.62" to 0.64"2505764 3/8"-20 to 225Neoprene
    		1/8
    		NPT
    		Male2564K310000000
    3/4
    		0.81" to 0.82"1754034 3/8"-20 to 225Neoprene
    		1/8
    		NPT
    		Male2564K32000000
    1
    		1.03" to 1.05"1754036 3/8"-20 to 225Neoprene
    		1/8
    		NPT
    		Male2564K33000000
    1 1/4
    		1.37" to 1.39"1754036 3/8"-20 to 225Neoprene
    		1/8
    		NPT
    		Male2564K34000000
    1 1/2
    		1.58" to 1.61"751736 3/8"-20 to 225Neoprene
    		1/8
    		NPT
    		Male2564K35000000
    2
    		2.03" to 2.07"751736 3/8"-20 to 225Neoprene
    		1/8
    		NPT
    		Male2564K36000000
    3
    		3.03" to 3.13"501154 3/8"-20 to 225Neoprene
    		1/4
    		NPT
    		Male2564K48000000
     
    back to top