Pneumatic Test Plugs | McMaster-Carr

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

REACH Compliant

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

RoHS Compliant with
Exemptions

	For Maximum Pipe Size (Numeric) For Maximum Pipe Size (Numeric)

1 1/4

1 1/2

	For Minimum Pipe Size (Numeric) For Minimum Pipe Size (Numeric)

3/4

1 1/4

1 1/2

	Bypass Pipe Size Bypass Pipe Size

	Bypass Gender Bypass Gender

45 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. 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. 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.

With Chain

For Pipe		Deflated		Max. Back Pressure				Material
Size	ID	Dia.	Ht.	Air, psi	Water, ft. of head	Required Inflation Pressure, psi	Temp. Range, °F	Seal	Chain/Ring		Each
3/4-1 1/4	0.75"-1.30"	3/4"	3 3/4"	17	40	45	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	000000
1 1/4-1 1/2	1.17"-1.75"	1 1/8"	5 1/2"	13	30	40	-20° to 125°	Natural Rubber	Zinc-Plated Steel	000000	00000
1 1/4-2	1.25"-2.10"	1 1/4"	5 9/16"	17	40	40	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	00000
2	1.90"-2.25"	1 3/4"	2 13/16"	13	30	40	-20° to 125°	Natural Rubber	Zinc-Plated Steel	000000	00000
2-3	1.90"-3.10"	1 3/4"	5 9/16"	17	40	35	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	00000
2 1/2	2.34"-2.75"	2 5/16"	4 1/2"	13	30	35	-20° to 125°	Natural Rubber	Zinc-Plated Steel	000000	00000
3	2.77"-3.25"	2 5/8"	5 1/4"	13	30	35	-20° to 125°	Natural Rubber	Zinc-Plated Steel	000000	00000
3-4	2.80"-4.25"	2 5/8"	5 3/16"	17	40	40	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	00000
4	3.41"-4.25"	3 1/4"	6 1/2"	13	30	30	-20° to 125°	Natural Rubber	Zinc-Plated Steel	000000	00000
4-6	3.40"-6.25"	3 1/4"	9 1/2"	17	40	30	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	000000
5	4.60"-5.25"	4 1/2"	7 3/4"	13	30	30	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	00000
6	5.44"-6.25"	5 1/4"	9"	13	30	30	-20° to 125°	Natural Rubber	Zinc-Plated Steel	000000	000000

With Eyebolt

For Pipe		Deflated		Max. Back Pressure				Material
Size	ID	Dia.	Ht.	Air, psi	Water, ft. of head	Required Inflation Pressure, psi	Temp. Range, °F	Seal	Eyebolt		Each
4-6	3.75"-6.25"	3 1/2"	9 13/16"	17	40	30	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	0000000
4-8	3.95"-8.25"	3 1/2"	23"	15	35	45	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	000000
6-8	5.25"-8.25"	5"	14"	17	25	30	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	000000
6-12	5.50"-12.25"	5 1/4"	25"	15	35	45	0° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	000000
8	7.00"-8.25"	6 3/4"	10 1/4"	17	40	25	-20° to 125°	Natural Rubber	Zinc-Plated Steel	000000	000000
8-12	7.00"-12.25"	6 3/4"	16"	11	40	20	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	000000
8-12	7.50"-12.25"	6 3/4"	19 7/8"	15	35	45	0° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	000000
8-16	7.50"-16.25"	7 1/4"	28"	15	35	45	0° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	000000
10	9.00"-10.25"	8 3/4"	11 3/4"	17	40	25	-20° to 125°	Natural Rubber	Zinc-Plated Steel	000000	000000
12	10.50"-12.25"	10 1/4"	13 3/4"	17	40	25	-20° to 125°	Natural Rubber	Zinc-Plated Steel	000000	000000
12-18	10.75"-18.75"	10 3/4"	25"	15	35	45	0° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	000000
12-24	11.00"-24.25"	10 3/4"	37"	15	35	45	0° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	00000000
15-16	14.00"-16.25"	13 3/4"	19 3/4"	13	30	25	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	000000
24-48	20.50"-50.00"	19"	68"	10	23	22	0° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	00000000

Air- and Water-Inflatable Plugs

Penetrate tight pipe junctures with the most flexible expansion plugs we offer. To inflate with air, use a hand pump (sold separately). Whether you fill with air or water, a pressure relief valve will prevent over expanding. 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		Deflated		Max. Back Pressure			Water Inlet				Material
Size	ID	Dia.	Ht.	Air, psi	Water, ft. of head	Required Inflation Pressure, psi	Thread Size	Thread Type	Gender	Temp. Range, °F	Seal	Fitting		Each
1 1/2-2	1.50"-2.00"	1 3/16"	7 5/8"	13	30	50	3/4"	GHT	Female	35° to 95°	Natural Rubber	Brass	0000000	000000
3-4	2.75"-4.25"	2 11/16"	9"	13	30	50	3/4"	GHT	Female	35° to 95°	Natural Rubber	Brass	0000000	00000
4-6	3.75"-6.25"	3 1/2"	11"	13	30	30	3/4"	GHT	Female	35° to 95°	Natural Rubber	Brass	0000000	00000
5-8	4.75"-8.25"	4 1/2"	14 1/2"	13	30	35	3/4"	GHT	Female	35° to 95°	Natural Rubber	Brass	0000000	000000
10-12	9.75"-12.25"	6 7/8"	20"	11	25	30	3/4"	GHT	Female	35° to 95°	Natural Rubber	Brass	0000000	000000
14-16	13.75"-16.25"	8 1/4"	22"	11	25	15	3/4"	GHT	Female	35° to 95°	Natural Rubber	Brass	0000000	000000

Air- and Water-Inflatable Plugs for Y-Joints

These extra-long plugs allow you to seal off two pipes at the same time. They have two separate inflation chambers to release back pressure gradually and prevent splash back as water clears the drain line. To inflate with air, use a hand pump (sold separately). Whether you fill with air or water, a pressure relief valve will prevent over expanding. 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		Deflated		Max. Back Pressure			Water Inlet				Material
Size	ID	Dia.	Ht.	Air, psi	Water, ft. of head	Required Inflation Pressure, psi	Thread Size	Thread Type	Gender	Temp. Range, °F	Seal	Fitting	Includes		Each
2-3	2.00"-3.10"	1 3/4"	19 1/2"	13	30	60	3/4"	GHT	Female	35° to 95°	Natural Rubber	Brass	4-ft. Lg. Air Hose	0000000	000000
3-4	2.75"-4.25"	2 1/2"	23 1/2"	13	30	60	3/4"	GHT	Female	35° to 95°	Natural Rubber	Brass	4-ft. Lg. Air Hose	0000000	00000
4-6	4.00"-6.25"	2 5/8"	30"	13	30	50	3/4"	GHT	Female	35° to 95°	Natural Rubber	Brass	4-ft. Lg. Air Hose	0000000	000000

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. 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.

With Chain

For Pipe		Deflated		Max. Back Pressure			Bypass				Material
Size	ID	Dia.	Ht.	Air, psi	Water, ft. of head	Required Inflation Pressure, psi	Pipe Size	Thread Type	Gender	Temp. Range, °F	Seal	Chain/Ring		Each
1 1/2	1.49"-1.88"	1 3/8"	3 13/16"	22	50	40	1/8	NPT	Male	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	0000000
2	1.88"-2.25"	1 3/4"	6"	22	50	40	1/8	NPT	Female	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	000000
3	2.62"-3.25"	2 1/2"	8"	22	50	40	1/2	NPT	Female	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	000000

With Eyebolt

For Pipe		Deflated		Max. Back Pressure			Bypass				Material
Size	ID	Dia.	Ht.	Air, psi	Water, ft. of head	Required Inflation Pressure, psi	Pipe Size	Thread Type	Gender	Temp. Range, °F	Seal	Eyebolt		Each
4	3.25"-4.25"	3 1/8"	8"	22	50	40	3/4	NPT	Female	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	0000000
6	4.50"-6.25"	4 1/2"	7"	13	30	35	1 1/2	NPT	Female	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	000000
8	7.00"-8.25"	6 3/4"	10"	13	30	35	3	NPT	Female	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	000000
10	9.00"-10.25"	8 3/4"	11 3/4"	13	30	35	3	NPT	Female	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	000000
12	10.50"-12.25"	10 1/4"	13 3/4"	13	30	35	3	NPT	Female	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	000000
16	14.00"-16.00"	13 3/4"	19 3/4"	13	30	35	3	NPT	Female	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	000000
12-24	11.25"-24.00"	11"	37"	13	30	45	3	NPT	Male	-20° to 125°	Natural Rubber	Zinc-Plated Steel	00000000	00000000