Hydrostatic Test Plugs | McMaster-Carr

	For Pipe Size Range For Pipe Size Range

	Deflated Diameter Deflated Diameter

	For Minimum Pipe ID For Minimum Pipe ID

	For Maximum Pipe ID For Maximum Pipe ID

	Deflated Height Deflated Height

	Maximum Air Back Pressure Maximum Air Back Pressure

	Required Inflation Pressure Required Inflation Pressure

	With Bypass With Bypass

Yes

	Maximum Water Back Pressure Maximum Water Back Pressure

	Minimum Temperature Minimum Temperature

-20° F

0° F

35° F

	Maximum Temperature Maximum Temperature

95° F

125° F

	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 with
Exemptions

	Bypass Gender Bypass Gender

Female

Male

	Bypass Pipe Size Bypass Pipe Size

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 to 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 to 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 to 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 to 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 to 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 to 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	000000
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 to 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 to 8	3.95"-8.25"	3 1/2"	23"	15	35	45	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	000000
6 to 8	5.25"-8.25"	5"	14"	17	40	30	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	000000
6 to 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 to 12	7.00"-12.25"	6 3/4"	16"	11	25	20	-20° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	000000
8 to 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 to 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 to 18	10.75"-18.25"	10 3/4"	25"	15	35	45	0° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	00000000
12 to 24	11.00"-24.25"	10 3/4"	37"	15	35	45	0° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	00000000
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 to 48	20.50"-50.00"	19"	84 1/2"	10	23	25	0° to 125°	Natural Rubber	Zinc-Plated Steel	0000000	00000000

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 Type	Hose Size	Gender	Temp. Range, °F	Seal	Fitting	Includes		Each
2 to 3	2.00"-3.10"	1 3/4"	19 1/2"	13	30	60	GHT	3/4	Female	35° to 95°	Natural Rubber	Brass	4-ft. Lg. Air Hose	0000000	000000
3 to 4	2.75"-4.25"	2 1/2"	23 1/2"	13	30	60	GHT	3/4	Female	35° to 95°	Natural Rubber	Brass	4-ft. Lg. Air Hose	0000000	000000
4 to 6	4.00"-6.25"	2 5/8"	30"	13	30	50	GHT	3/4	Female	35° to 95°	Natural Rubber	Brass	4-ft. Lg. Air Hose	0000000	000000

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 Type	Hose Size	Gender	Temp. Range, °F	Seal	Fitting		Each
1 1/2 to 2	1.50"-2.00"	1 3/16"	7 5/8"	13	30	50	GHT	3/4	Female	35° to 95°	Natural Rubber	Brass	0000000	000000
3 to 4	2.75"-4.25"	2 11/16"	9"	13	30	50	GHT	3/4	Female	35° to 95°	Natural Rubber	Brass	0000000	00000
4 to 6	3.75"-6.25"	3 1/2"	11"	13	30	30	GHT	3/4	Female	35° to 95°	Natural Rubber	Brass	0000000	00000
5 to 8	4.75"-8.25"	4 1/2"	14 1/2"	13	30	35	GHT	3/4	Female	35° to 95°	Natural Rubber	Brass	0000000	000000
10 to 12	9.75"-12.25"	6 7/8"	20"	11	25	30	GHT	3/4	Female	35° to 95°	Natural Rubber	Brass	0000000	000000
14 to 16	13.75"-16.25"	8 1/4"	22"	11	25	15	GHT	3/4	Female	35° to 95°	Natural Rubber	Brass	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	1/4	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 to 24	11.25"-24.00"	11"	37"	13	30	45	3	NPT	Male	-20° to 125°	Natural Rubber	Zinc-Plated Steel	00000000	00000000