3.5 Pipe Size Reducers | McMaster-Carr

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EAR99

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ASTM A126

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17 Products

About Pipe and Fittings

Measure your pipe and fittings to identify their pipe size, thread size, schedule, and thread type. Then, find compatible components.

Low-Pressure Iron and Steel Threaded Pipe Fittings

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

Bushing Straight Reducing Adapters with Hex Body

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

Pipe Size
(A)	(B)	Pressure 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	Iron	ASME B16.14	44605K742	000000
3 1/2	1 1/4	125	175 psi @ 72° F	125 psi @ 350° F	Iron	ASME B16.14	44605K741	00000
3 1/2	1 1/2	125	175 psi @ 72° F	125 psi @ 350° F	Iron	ASME B16.14	44605K739	00000
3 1/2	2	125	175 psi @ 72° F	125 psi @ 350° F	Iron	ASME B16.14	44605K738	00000
3 1/2	2 1/2	125	175 psi @ 72° F	125 psi @ 350° F	Iron	ASME B16.14	44605K737	00000
3 1/2	3	125	175 psi @ 72° F	125 psi @ 350° F	Iron	ASME B16.14	44605K736	00000
4	3 1/2	150	150 psi @ 72° F	150 psi @ 350° F	Iron	ASME B16.14	44605K409	00000

Straight Reducers

For Use With: Air, Steam, Oil, Water, Natural Gas
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	Iron	44605K807	0000000
3 1/2	3	150 psi @ 72° F	150 psi @ 350° F	Iron	44605K805	000000
4	3 1/2	150 psi @ 72° F	150 psi @ 350° F	Iron	44605K586	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.

Bushing Straight Reducing Adapters with Hex Body

For Use With: Air, Steam, Oil, Water, Natural Gas
Pressure 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)	Pressure 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	4638K554	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	4638K969	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	4638K968	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	4638K967	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	4638K966	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	4638K964	00000

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.

Bushing Straight Reducing Adapters with Hex or Octagon Body

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

Pipe Size
(A)	(B)	Max. Pressure	Body Shape	Material	Hex Width	Specifications Met		Each
NPT Male × NPT Female
4	3 1/2	200 psi @ 72° F	Hex	Brass	5 13/64"	ASME B1.20.1, ASME B16.15, NSF/ANSI 61	4429K478	0000000