Tapered Expansion Plugs | McMaster-Carr

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Expansion Plug Type

Hex Nut

Wing Nut

Thread Type

NPT

System of Measurement

Pipe Size

Sealing Location

For Pipe ID

Maximum Air Back Pressure

Bypass Pipe Size

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With Bypass

Bypass Thread Type

Material

Bypass Gender

Seal Material

Overall Height

Bypass Cap Material

Maximum Temperature

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

250 ft. of head or greater

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

REACH

RoHS

Minimum Temperature

Stem Material

Gender

Height

25 Products

Expansion Plugs with Bypass

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 C and D have an NPT threaded bypass for making leak-tight connections.

For Pipe		Max. Back Pressure				Material		Bypass
Size	ID	Air, psi	Water, ft. of head	O'all Ht.	Temp. Range, °F	Seal	Bypass Cap	Pipe Size	Thread Type	Gender		Each
Style C
Iron Stem
1/2	0.47"-0.50"	Not Rated	46	4 1/4"	30° to 150°	Natural Rubber	Metal	1/16	NPT	Male	0000000	000000
3/4	0.72"-0.75"	Not Rated	46	5 1/8"	30° to 150°	Natural Rubber	Metal	1/8	NPT	Male	0000000	00000
1	0.97"-1.00"	Not Rated	46	5"	30° to 150°	Natural Rubber	Metal	1/4	NPT	Male	0000000	00000
2	1.75"-2.00"	Not Rated	34	10 3/8"	30° to 150°	Natural Rubber	Metal	1/2	NPT	Male	0000000	00000
3	2.75"-3.00"	Not Rated	34	10 1/2"	30° to 150°	Natural Rubber	Metal	1/2	NPT	Male	0000000	00000
4	3.63"-4.00"	Not Rated	23	10 1/8"	30° to 150°	Natural Rubber	Metal	1/2	NPT	Male	0000000	00000
5	4.50"-5.00"	Not Rated	23	12 5/8"	30° to 150°	Natural Rubber	Metal	1/2	NPT	Male	0000000	00000
6	5.50"-6.00"	Not Rated	23	12 1/2"	30° to 150°	Natural Rubber	Metal	1/2	NPT	Male	0000000	00000
8	7.50"-8.00"	Not Rated	4	14 3/4"	30° to 150°	Natural Rubber	Metal	1/2	NPT	Male	0000000	00000
10	9.50"-10.00"	Not Rated	4	14 7/8"	30° to 150°	Natural Rubber	Metal	1/2	NPT	Male	0000000	000000
12	11.50"-12.00"	Not Rated	4	14 5/8"	30° to 150°	Natural Rubber	Metal	1	NPT	Male	0000000	000000
Style D
Plastic Stem
1 1/2	1.42"-1.93"	50	115	4 1/2"	-40° to 180°	Natural Rubber	Plastic	1/2	NPT	Male	0000000	00000
2	1.93"-2.36"	40	92	4 1/2"	-40° to 180°	Natural Rubber	Plastic	1/2	NPT	Male	0000000	00000
2 1/2	2.40"-2.76"	30	69	4 1/2"	-40° to 180°	Natural Rubber	Plastic	1/2	NPT	Male	0000000	00000
3	2.87"-3.31"	15	34	4 1/2"	-40° to 180°	Natural Rubber	Plastic	1/2	NPT	Male	0000000	00000
4	3.54"-4.25"	15	34	4 1/2"	-40° to 180°	Natural Rubber	Plastic	1/2	NPT	Male	0000000	00000
5	4.72"-5.37"	12	27	4 1/2"	-40° to 180°	Natural Rubber	Plastic	1/2	NPT	Male	0000000	00000
6	5.50"-6.29"	10	23	4 1/2"	-40° to 180°	Natural Rubber	Plastic	1/2	NPT	Male	0000000	00000

Deep-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 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 Pipe		Max. Back Pressure					Bypass
Size	ID	Air, psi	Water, ft. of head	O'all Ht.	Temp. Range, °F	Seal Material	Pipe Size	Thread Type	Gender		Each
Zinc-Plated Steel Stem
1/2	0.62"-0.64"	250	576	4 3/8"	-20° to 225°	Neoprene Rubber	1/8	NPT	Male	0000000	0000000
3/4	0.81"-0.82"	175	403	4 3/8"	-20° to 225°	Neoprene Rubber	1/8	NPT	Male	0000000	000000
1	1.03"-1.05"	175	403	6 3/8"	-20° to 225°	Neoprene Rubber	1/8	NPT	Male	0000000	000000
1 1/4	1.37"-1.39"	175	403	6 3/8"	-20° to 225°	Neoprene Rubber	1/8	NPT	Male	0000000	000000
1 1/2	1.58"-1.61"	75	173	6 3/8"	-20° to 225°	Neoprene Rubber	1/8	NPT	Male	0000000	000000
2	2.03"-2.07"	75	173	6 3/8"	-20° to 225°	Neoprene Rubber	1/8	NPT	Male	0000000	000000
3	3.03"-3.13"	50	115	4 3/8"	-20° to 225°	Neoprene Rubber	1/4	NPT	Male	0000000	000000