3 1/2 Pipe Size Couplings

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	Pipe Size Pipe Size	Show

3 1/2

	Pipe Size Pipe Size	Hide

1/16
1/8
1/4
3/8
1/2
5/8
3/4
1
1 1/4
1 1/2
2
2 1/2
3
3 1/2
4
5
6
8
10
12

	Thread Type Thread Type

NPT

	Type Type


Adapter	Pipe

Reducer	Reducing Adapter

Bushing

	Shape Shape

	Straight

	Material Material

	Finish Finish

Black Coated

Galvanized

	Gender Gender

Female

Male

	Connection Style Connection Style

Threaded

Socket Connect

Clamp On

	For Use With For Use With

	System of Measurement System of Measurement

Inch

	Length Length

	Class Class

125

150

	For Pipe Material For Pipe Material

Steel

Brass

	Connection Type Connection Type


Pipe	Tube

	Body Shape Body Shape

	Hex

	Maximum Pressure Maximum Pressure

	For Pipe Schedule For Pipe Schedule

	40

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

DFARS Specialty Metals
COTS-Exempt

	Specifications Met Specifications Met

ASME

ASTM

NSF/ANSI

	OD OD

	Maximum Steam Pressure Maximum Steam Pressure

125 psi @ 350° F

150 psi @ 350° F

	Schedule Schedule

	40

	Threading Threading

Unthreaded

	Hex Width Hex Width

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32 Products

How to Identify and Measure Fittings

Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.

Low-Pressure Iron and Steel Threaded Pipe Fittings

Use these fittings for low-pressure applications in noncorrosive environments.

For technical drawings and 3-D models, click on a part number.

Bushing Straight Reducing Adapters with Hex Body

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: See table
Pipe Nipples and Pipe: Use Schedule 40 steel

Pipe Size
(A)	(B)	Class	Max. Pressure	Max. Steam Pressure	Material	Specifications Met		Each
NPT Male × NPT Female
3 1/2	1	125	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	ASME B16.14	000000000	000000
3 1/2	1 1/4	125	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	ASME B16.14	000000000	00000
3 1/2	1 1/2	125	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	ASME B16.14	000000000	00000
3 1/2	2	125	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	ASME B16.14	000000000	00000
3 1/2	2 1/2	125	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	ASME B16.14	000000000	00000
3 1/2	3	125	175 psi @ 72° F	125 psi @ 350° F	Black-Coated Iron	ASME B16.14	000000000	00000
4	3 1/2	150	150 psi @ 72° F	150 psi @ 350° F	Black-Coated Iron	ASME B16.14	000000000	00000

Straight Reducers

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 150
Specifications Met:
NPT: ASME B1.20.1, ASME B16.3, UL Listed
BSPT: DIN EN 10226
Pipe Nipples and Pipe: Use Schedule 40 steel

Pipe Size
(A)	(B)	Max. Pressure	Max. Steam Pressure	Material		Each
NPT Female
3 1/2	2	150 psi @ 72° F	150 psi @ 350° F	Black-Coated Iron	000000000	0000000
3 1/2	2 1/2	150 psi @ 72° F	150 psi @ 350° F	Black-Coated Iron	000000000	000000
3 1/2	3	150 psi @ 72° F	150 psi @ 350° F	Black-Coated Iron	000000000	000000
4	3 1/2	150 psi @ 72° F	150 psi @ 350° F	Black-Coated Iron	000000000	000000

Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings

The galvanized finish on these fittings provides fair corrosion resistance. Fittings are for use in low-pressure applications.

For technical drawings and 3-D models, click on a part number.

Bushing Straight Reducing Adapters with Hex Body

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: See table
Specifications Met: See table
Pipe Nipples and Pipe: Use Schedule 40 galvanized steel
Flanges: Use Class 150 galvanized steel

Pipe Size
(A)	(B)	Class	Max. Pressure	Max. Steam Pressure	Material	Specifications Met		Each
NPT Male × NPT Female
4	3 1/2	150	150 psi @ 72° F	150 psi @ 350° F	Galvanized Iron	ASME B16.14	00000000	000000
3 1/2	1	125	125 psi @ 72° F	125 psi @ 350° F	Galvanized Iron	ASME B1.20.1, ASME B16.14, ASTM A126, UL Listed	00000000	00000
3 1/2	1 1/4	125	125 psi @ 72° F	125 psi @ 350° F	Galvanized Iron	ASME B1.20.1, ASME B16.14, ASTM A126, UL Listed	00000000	00000
3 1/2	1 1/2	125	125 psi @ 72° F	125 psi @ 350° F	Galvanized Iron	ASME B1.20.1, ASME B16.14, ASTM A126, UL Listed	00000000	00000
3 1/2	2	125	125 psi @ 72° F	125 psi @ 350° F	Galvanized Iron	ASME B1.20.1, ASME B16.14, ASTM A126, UL Listed	00000000	00000
3 1/2	2 1/2	125	125 psi @ 72° F	125 psi @ 350° F	Galvanized Iron	ASME B1.20.1, ASME B16.14, ASTM A126, UL Listed	00000000	00000
3 1/2	3	125	125 psi @ 72° F	125 psi @ 350° F	Galvanized Iron	ASME B1.20.1, ASME B16.14, ASTM A126, UL Listed	00000000	00000

Straight Reducers

For Use With: Air, Steam, Oil, Water, Natural Gas
Class: 150
Specifications Met:
NPT: ASME B1.20.1, ASME B16.3, ASTM A153, UL Listed
BSPT: ASTM A197, DIN EN 10226
Pipe Nipples and Pipe: Use Schedule 40 galvanized steel
Flanges: Use Class 150 galvanized steel

Pipe Size
(A)	(B)	Max. Pressure	Max. Steam Pressure	Material		Each
NPT Female
3 1/2	2	150 psi @ 72° F	150 psi @ 350° F	Galvanized Iron	00000000	0000000
3 1/2	2 1/2	150 psi @ 72° F	150 psi @ 350° F	Galvanized Iron	00000000	000000
3 1/2	3	150 psi @ 72° F	150 psi @ 350° F	Galvanized Iron	00000000	000000
4	3 1/2	150 psi @ 72° F	150 psi @ 350° F	Galvanized Iron	00000000	000000

Low-Pressure Brass and Bronze Threaded Pipe Fittings

Use these fittings in low-pressure flow applications. They have good corrosion resistance. Fittings rated for use with drinking water meet NSF/ANSI 61 safety standards.

For technical drawings and 3-D models, click on a part number.

Bushing Straight Reducing Adapters with Hex Body

For Use With:
NPT × NPT: Air, Drinking Water, Natural Gas, Oil
BSPT × BSPT: Air, Natural Gas, Oil, Steam, Water
Class: 125
Specifications Met: See table
Pipe Nipples and Pipe: Use Schedule 40 brass
Flanges:
NPT: Use Class 150 brass
BSPT: Use Class 150 bronze

Pipe Size
(A)	(B)	Max. Pressure	Material	Specifications Met		Each
NPT Male × NPT Female
3 1/2	3	200 psi @ 72° F	Brass	ASME B1.20.1, ASME B16.15, NSF/ANSI 61	00000000	0000000
4	3 1/2	200 psi @ 72° F	Brass	ASME B1.20.1, ASME B16.15, NSF/ANSI 61	00000000	000000

Standard-Wall Plastic Pipe for Water

Connect this pipe to standard-wall plastic pipe fittings for a variety of residential and commercial low-pressure plumbing and water supply applications. It’s made of PVC, which has good corrosion resistance. Connect to unthreaded female socket-connect fittings using a PVC primer and cement (also known as solvent weld).

Pipe for drinking water meets NSF/ANSI Standard 61.

Pipe that meets ASTM D1784 and ASTM D1785 adheres to specifications and testing requirements for material quality.

Bend radius is the point to which you can bend pipe or tubing without damaging it. The smaller the measurement, the better the bend.

Warning: Never use plastic pipe fittings and pipe with compressed air or gas.

For technical drawings and 3-D models, click on a part number.

Rigid Pipe

For Use With: Drinking Water, Water
Maximum Temperature: 140° F
Specifications Met: ASTM D1784, ASTM D1785, NSF/ANSI 61
Fittings: Use Schedule 40 PVC Plastic
Flanges: Use Schedule 40 PVC Plastic

								5ft.		10ft.
Pipe Size	Schedule	OD	ID	Wall Thick.	Color	Clarity	Max. Pressure		Each		Each
3 1/2	40	4"	3.548"	0.226"	White	Opaque	240 psi @ 72° F	000000000	000000	000000000	0000000

Pipe Cement for Max. Pipe Size 6

00000000

Each

00000

Clear Blue Rigid Pipe

For Use With: Drinking Water, Water
Maximum Temperature: 140° F
Specifications Met: ASTM D1784, ASTM D1785, NSF/ANSI 61
Fittings: Use Schedule 40 PVC Plastic
Flanges: Use Schedule 40 PVC Plastic

Clear pipe allows you to see what’s flowing through the line.

						10ft.
Pipe Size	Schedule	OD	ID	Wall Thick.	Max. Pressure		Each
3 1/2	40	4"	3.548"	0.226"	120 psi @ 72° F	000000000	0000000

Pipe Cement for Max. Pipe Size 6

00000000

Each

00000

Vacuum Fittings for Steel Tubing

For Use With: Air, Glass, Plastic Pellets, Resins, Wood Chips
Temperature Range: -10° to 180° F
Tubing: Galvanized Steel: Use with steel, galvanized steel
Steel: Use with steel

Use these fittings to create an air vacuum system without the hassle of brazing and welding. Insert two fittings into a clamp (sold separately) and tighten to form a secure seal.

Galvanized steel fittings have fair corrosion resistance. Fittings without a finish should only be used in noncorrosive environments.

For technical drawings and 3-D models, click on a part number.

Straight Adapters, Tube × Male Threaded Pipe

				Galvanized Steel		Steel
For Tube OD	Pipe Size	Max. Pressure	Max. Vacuum		Each		Each
NPT Threads
3 1/2"	3 1/2	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	000000	0000000	000000

Straight Adapters, Tube × Female Threaded Pipe

				Galvanized Steel		Steel
For Tube OD	Pipe Size	Max. Pressure	Max. Vacuum		Each		Each
NPT Threads
3 1/2"	3 1/2	15 psi @ 72° F	15 in. of Hg @ 72° F	00000000	000000	0000000	000000