Bypass Plugs | McMaster-Carr

	For Pipe Size For Pipe Size

1/2
5/8
3/4
7/8
1
1 1/8
1 1/4
1 1/2
1 3/4
2
2 1/2
3
4
5
6
8
10
12

	For Minimum Pipe ID For Minimum Pipe ID

	Expansion Plug Type Expansion Plug Type


Wing Nut	T-Handle

	Maximum Air Back Pressure Maximum Air Back Pressure

	For Maximum Pipe ID For Maximum Pipe ID

	Stem Material Stem Material

	Bypass Thread Type Bypass Thread Type

	Maximum Water Back Pressure Maximum Water Back Pressure

	Maximum Temperature Maximum Temperature

	Bypass Connection Type Bypass Connection Type

Pipe

Tube

Hose

	Overall Height Overall Height

	Bypass Pipe Size Bypass Pipe Size

	Bypass Cap Material Bypass Cap Material

Metal

Plastic

	Minimum Temperature Minimum Temperature

	Seal Material Seal Material

Natural Rubber

Neoprene Rubber

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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43 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. 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.

Style G and Style J plugs have a Schrader valve, which has an internal spring that holds the valve shut until you depress the pin, providing control over air flow.

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	Thread Size	Gender	For Tube ID	Tube Connection Type		Each
Style A
Aluminum Stem
1 1/2	1.53"-2.25"	125	288	8 1/4"	-20° to 170°	Natural Rubber	Metal	3/8	NPS	__	Male	__	__	0000000	000000
2	1.79"-2.38"	125	288	8 1/4"	-20° to 170°	Natural Rubber	Metal	3/8	NPS	__	Male	__	__	0000000	00000
3	2.77"-3.25"	125	288	8 1/4"	-20° to 170°	Natural Rubber	Metal	3/8	NPS	__	Male	__	__	0000000	00000
4	3.85"-4.25"	35	81	8 1/4"	-20° to 170°	Natural Rubber	Metal	1/2	NPS	__	Male	__	__	0000000	00000
Style B
Steel Stem
6	5.80"-6.50"	20	46	12"	35° to 210°	Natural Rubber	Metal	1/2	NPS	__	Male	__	__	0000000	000000
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	00000
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	000000
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
Style E
Stainless Steel Stem
1/2	0.48"-0.53"	10	24	3 1/2"	-40° to 250°	Neoprene Rubber	__	__	__	__	__	1/4"	Barbed	0000000	000000
5/8	0.60"-0.67"	10	24	3 1/2"	-40° to 250°	Neoprene Rubber	__	__	__	__	__	1/4"	Barbed	0000000	000000
3/4	0.72"-0.79"	10	24	3 1/2"	-40° to 250°	Neoprene Rubber	__	__	__	__	__	1/4"	Barbed	0000000	000000
7/8	0.81"-0.89"	10	24	3 1/2"	-40° to 250°	Neoprene Rubber	__	__	__	__	__	1/4"	Barbed	0000000	000000
Style F
Stainless Steel Stem
1	0.94"-1.03"	10	24	4"	-40° to 250°	Neoprene Rubber	__	__	__	__	__	1/4"	Barbed	0000000	000000
1 1/8	1.06"-1.17"	5	12	4"	-40° to 250°	Neoprene Rubber	__	__	__	__	__	1/4"	Barbed	0000000	000000
1 1/4	1.21"-1.33"	5	12	4"	-40° to 250°	Neoprene Rubber	__	__	__	__	__	1/4"	Barbed	0000000	000000
__	1.32"-1.45"	5	12	4"	-40° to 250°	Neoprene Rubber	__	__	__	__	__	1/4"	Barbed	0000000	000000
1 1/2	1.44"-1.58"	5	12	4"	-40° to 250°	Neoprene Rubber	__	__	__	__	__	1/4"	Barbed	0000000	000000
1 3/4	1.70"-1.87"	5	12	4"	-40° to 250°	Neoprene Rubber	__	__	__	__	__	1/4"	Barbed	0000000	000000
2	1.92"-2.14"	5	12	4"	-40° to 250°	Neoprene Rubber	__	__	__	__	__	1/4"	Barbed	0000000	000000
Style G
Steel Stem
1	0.94"-1.03"	10	23	3 3/4"	-40° to 210°	Neoprene Rubber	Plastic	__	Schrader Valve	0.305"-32	__	__	__	00000000	000000
1 1/2	1.44"-1.58"	10	23	4"	-40° to 210°	Neoprene Rubber	Plastic	__	Schrader Valve	0.305"-32	__	__	__	00000000	000000
2 1/2	2.44"-2.71"	5	12	4 15/16"	-40° to 210°	Neoprene Rubber	Plastic	__	Schrader Valve	0.305"-32	__	__	__	00000000	000000
Style H
Plastic Stem
1/2	0.49"-0.60"	100	231	2 15/16"	-40° to 180°	Natural Rubber	Plastic	1/8	BSPP	__	Male	__	__	0000000	00000
3/4	0.74"-0.90"	100	231	2 15/16"	-40° to 180°	Natural Rubber	Plastic	1/8	BSPP	__	Male	__	__	0000000	00000
1	0.98"-1.20"	100	231	2 15/16"	-40° to 180°	Natural Rubber	Plastic	1/8	BSPP	__	Male	__	__	0000000	00000
1 1/4	1.23"-1.45"	50	115	2 15/16"	-40° to 180°	Natural Rubber	Plastic	1/8	BSPP	__	Male	__	__	0000000	00000
Style J
Steel Stem
3/4	0.72"-0.79"	10	23	3 7/16"	-40° to 210°	Neoprene Rubber	Plastic	__	Schrader Valve	0.305"-32	__	__	__	00000000	000000
7/8	0.81"-0.89"	10	23	3 5/8"	-40° to 210°	Neoprene Rubber	Plastic	__	Schrader Valve	0.305"-32	__	__	__	00000000	000000