Bronze Pipe Reducers | McMaster-Carr

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41 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 Brass and Bronze Threaded Pipe Fittings

Use these fittings in low-pressure flow applications. They have good corrosion resistance.

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

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: See table

Pipe Size						For Flange
(A)	(B)	Max. Pressure	Max. Steam Pressure	Material	Hex Width	Class	Material	Specifications Met		Each
BSPT Male × BSPT Female
1/2	1/8	200 psi @ 72° F	125 psi @ 400° F	Bronze	26mm	150	Bronze	ASME B16.15, ASME BS21, ASTM B584	00000000	000000
1/2	1/4	200 psi @ 72° F	125 psi @ 400° F	Bronze	26mm	150	Bronze	ASME B16.15, ASME BS21, ASTM B584	00000000	0000
1/2	3/8	200 psi @ 72° F	125 psi @ 400° F	Bronze	25mm	150	Bronze	ASME B16.15, ASME BS21, ASTM B584	00000000	0000
3/4	1/4	200 psi @ 72° F	125 psi @ 400° F	Bronze	31mm	150	Bronze	ASME B16.15, ASME BS21, ASTM B584	00000000	00000
3/4	3/8	200 psi @ 72° F	125 psi @ 400° F	Bronze	31mm	150	Bronze	ASME B16.15, ASME BS21, ASTM B584	00000000	00000
3/4	1/2	200 psi @ 72° F	125 psi @ 400° F	Bronze	30mm	150	Bronze	ASME B16.15, ASME BS21, ASTM B584	00000000	00000
1	1/2	200 psi @ 72° F	125 psi @ 400° F	Bronze	37mm	150	Bronze	ASME B16.15, ASME BS21, ASTM B584	00000000	00000
1	3/4	200 psi @ 72° F	125 psi @ 400° F	Bronze	37mm	150	Bronze	ASME B16.15, ASME BS21, ASTM B584	00000000	00000
1 1/4	3/4	200 psi @ 72° F	125 psi @ 400° F	Bronze	46mm	150	Bronze	ASME B16.15, ASME BS21, ASTM B584	00000000	00000
1 1/4	1	200 psi @ 72° F	125 psi @ 400° F	Bronze	46mm	150	Bronze	ASME B16.15, ASME BS21, ASTM B584	00000000	00000
1 1/2	1/4	200 psi @ 72° F	125 psi @ 400° F	Bronze	27mm	150	Bronze	ASME B16.15, ASME BS21, ASTM B584	00000000	00000
1 1/2	1/2	200 psi @ 72° F	125 psi @ 400° F	Bronze	35mm	150	Bronze	ASME B16.15, ASME BS21, ASTM B584	00000000	00000
1 1/2	3/4	200 psi @ 72° F	125 psi @ 400° F	Bronze	43mm	150	Bronze	ASME B16.15, ASME BS21, ASTM B584	00000000	00000
1 1/2	1	200 psi @ 72° F	125 psi @ 400° F	Bronze	52mm	150	Bronze	ASME B16.15, ASME BS21, ASTM B584	00000000	00000
1 1/2	1 1/4	200 psi @ 72° F	125 psi @ 400° F	Bronze	52mm	150	Bronze	ASME B16.15, ASME BS21, ASTM B584	00000000	00000
2	1	200 psi @ 72° F	125 psi @ 400° F	Bronze	51mm	150	Bronze	ASME B16.15, ASME BS21, ASTM B584	00000000	00000
2	1 1/4	200 psi @ 72° F	125 psi @ 400° F	Bronze	65mm	150	Bronze	ASME B16.15, ASME BS21, ASTM B584	00000000	00000
2	1 1/2	200 psi @ 72° F	125 psi @ 400° F	Bronze	64mm	150	Bronze	ASME B16.15, ASME BS21, ASTM B584	00000000	00000

Straight Reducers

For Use With:
NPT: Air, Drinking Water, Natural Gas, Oil
BSPT: Air, Natural Gas, Oil, Steam, Water
Pressure Class: 125
Specifications Met:
NPT: ASME B1.20.1, ASME B16.15, NSF/ANSI 61
BSPT: ASME B16.15, ASME BS21, ASTM B584
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	Max. Steam Pressure	Material		Each
BSPT Female
1/4	1/8	200 psi @ 72° F	125 psi @ 400° F	Bronze	00000000	000000
3/8	1/4	200 psi @ 72° F	125 psi @ 400° F	Bronze	00000000	00000
1/2	1/8	200 psi @ 72° F	125 psi @ 400° F	Bronze	00000000	00000
1/2	1/4	200 psi @ 72° F	125 psi @ 400° F	Bronze	00000000	00000
1/2	3/8	200 psi @ 72° F	125 psi @ 400° F	Bronze	00000000	00000
3/4	1/4	200 psi @ 72° F	125 psi @ 400° F	Bronze	00000000	00000
3/4	3/8	200 psi @ 72° F	125 psi @ 400° F	Bronze	00000000	00000
3/4	1/2	200 psi @ 72° F	125 psi @ 400° F	Bronze	00000000	00000
1	1/2	200 psi @ 72° F	125 psi @ 400° F	Bronze	00000000	00000
1	3/4	200 psi @ 72° F	125 psi @ 400° F	Bronze	00000000	00000
1 1/4	3/4	200 psi @ 72° F	125 psi @ 400° F	Bronze	00000000	00000
1 1/4	1	200 psi @ 72° F	125 psi @ 400° F	Bronze	00000000	00000
1 1/2	3/4	200 psi @ 72° F	125 psi @ 400° F	Bronze	00000000	00000
1 1/2	1	200 psi @ 72° F	125 psi @ 400° F	Bronze	00000000	00000
1 1/2	1 1/4	200 psi @ 72° F	125 psi @ 400° F	Bronze	00000000	00000
2	1	200 psi @ 72° F	125 psi @ 400° F	Bronze	00000000	000000
2	1 1/4	200 psi @ 72° F	125 psi @ 400° F	Bronze	00000000	00000
2	1 1/2	200 psi @ 72° F	125 psi @ 400° F	Bronze	00000000	00000

Press-Connect Fittings for Copper Tubing

For Use With: Drinking Water
Maximum Pressure: 200psi @ 72° F
Temperature Range: 0° to 250° F
Tubing: Use with K, M, L copper
Specifications Met: See table

Crimp these fittings to copper tubing with a crimping tool (sold separately). An O-ring on the inside of the fitting creates a leak-tight connection that doesn’t require heat or soldering. They are comparable to Viega ProPress fittings. Fittings have good corrosion resistance. They meet NSF/ANSI safety standards for use with drinking water systems.

Copper tube size is the accepted designation of the copper tubing industry, not the actual tube OD.

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

Straight Reducing Adapters, Male Press-Connect Tube × Female Press-Connect Tube

Tube Connection (Male)		Tube Connection (Female)
Copper Tube Size	Tube OD	Copper Tube Size	For Tube OD	Lg.	Material	Specifications Met		Each
1 1/2	1 5/8"	1/2	5/8"	2 25/32"	Bronze	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	000000
2	2 1/8"	1/2	5/8"	3 13/64"	Bronze	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	00000
2	2 1/8"	3/4	7/8"	3 21/64"	Bronze	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	00000

Replacement O-Rings

For Copper Tube Size	For Tube OD	O-Ring Material		Each
1/2	5/8"	EPDM Rubber	0000000	00000
3/4	7/8"	EPDM Rubber	0000000	0000