4 1/8" Tube Adapters | McMaster-Carr

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Copper Tube Size

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Copper Tube Type

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Drinking Water

Maximum Pressure @ Temperature

200 psi @ 72° F

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43 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.

Temperature Range: 32° to 200° F

Solder these fittings to copper tubing or the tube end of another fitting for a permanent, leak-tight connection. They are also known as sweat fittings. Fittings have good corrosion resistance. To adhere to safety standards for drinking water systems, use fittings that meet NSF/ANSI 61 or EN 1057.

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

Straight Adapters, Male Socket-Connect Tube × Female Socket-Connect Tube

For Use With: Drinking Water
Tubing: Use with K, M, L copper
Specifications Met: ASME B16.22, MSS-SP104, NSF/ANSI 61

Tube Connection (A)		Tube Connection (B)
Copper Tube Size	Tube OD	Copper Tube Size	For Tube OD	Material	Max. Pressure	Lg.		Each
4	4 1/8"	2	2 1/8"	Copper	200 psi @ 72° F	4 7/8"	00000000	000000
4	4 1/8"	2 1/2	2 5/8"	Copper	200 psi @ 72° F	4 11/16"	00000000	00000
4	4 1/8"	3	3 1/8"	Copper	200 psi @ 72° F	4 19/32"	00000000	00000
4	4 1/8"	3 1/2	3 5/8"	Copper	200 psi @ 72° F	4 5/8"	00000000	00000
5	5 1/8"	4	4 1/8"	Copper	200 psi @ 72° F	5 1/2"	00000000	000000
6	6 1/8"	4	4 1/8"	Copper	200 psi @ 72° F	6 35/64"	00000000	000000

Straight Adapters, Female Socket-Connect Tube × Male Threaded Pipe

For Use With: Drinking Water
Tubing: Use with K, M, L copper
Specifications Met: See table

NPT Threads
Copper Tube Size	For Tube OD	Pipe Size	Material	Max. Pressure	Specifications Met		Each
4	4 1/8"	4	Copper	200 psi @ 72° F	ASME B16.22, MSS-SP104, NSF/ANSI 61	00000000	0000000

Straight Connectors, Female Socket-Connect Tube

For Use With: Drinking Water
Tubing: Use with K, M, L copper
Specifications Met: ASME B16.22, MSS-SP104, NSF/ANSI 61

Copper Tube Size	For Tube OD	Material	Max. Pressure		Each
4	4 1/8"	Copper	200 psi @ 72° F	00000000	000000

Straight Connectors with Center Stop, Female Socket-Connect Tube

For Use With: Drinking Water
Tubing: See table
Specifications Met: See table

Fittings with center stop have a small internal ridge that prevents the tubing from sliding all the way through the fitting.

Copper Tube Size	For Tube OD	Material	Max. Pressure	For Copper Tube Type	Specifications Met		Each
4	4 1/8"	Copper	200 psi @ 72° F	K, M, L	ASME B16.22, MSS-SP104, NSF/ANSI 61	00000000	000000

Straight Reducers with Center Stop, Female Socket-Connect Tube

For Use With: Drinking Water
Tubing: Use with K, M, L copper
Specifications Met: ASME B16.22, MSS-SP104, NSF/ANSI 61

Fittings with center stop have a small internal ridge that prevents the tubing from sliding all the way through the fitting.

Tube Connection (A)		Tube Connection (B)
Copper Tube Size	For Tube OD	Copper Tube Size	For Tube OD	Material	Max. Pressure		Each
4	4 1/8"	2	2 1/8"	Copper	200 psi @ 72° F	00000000	000000
4	4 1/8"	2 1/2	2 5/8"	Copper	200 psi @ 72° F	00000000	00000
4	4 1/8"	3	3 1/8"	Copper	200 psi @ 72° F	00000000	00000
4	4 1/8"	3 1/2	3 5/8"	Copper	200 psi @ 72° F	00000000	00000
5	5 1/8"	4	4 1/8"	Copper	200 psi @ 72° F	00000000	000000
6	6 1/8"	4	4 1/8"	Copper	200 psi @ 72° F	00000000	000000

Short 90° Elbow Connectors, Female Socket-Connect Tube

For Use With: Drinking Water
Tubing: See table
Specifications Met: See table

Copper Tube Size	For Tube OD	Material	Max. Pressure	For Copper Tube Type	Specifications Met		Each
4	4 1/8"	Copper	200 psi @ 72° F	K, M, L	ASME B16.22, MSS-SP104, NSF/ANSI 61	00000000	0000000

Tee Connectors, Female Socket-Connect Tube

For Use With: Drinking Water
Tubing: See table
Specifications Met: See table

Copper Tube Size	For Tube OD	Material	Max. Pressure	For Copper Tube Type	Specifications Met		Each
4	4 1/8"	Copper	200 psi @ 72° F	K, M, L	ASME B16.22, MSS-SP104, NSF/ANSI 61	00000000	0000000

Inline Tee Reducers, Female Socket-Connect Tube

For Use With: See table
Tubing: Use with K, M, L copper
Specifications Met: See table

Inline tees are also known as branch tees.

Tube Connection (A)		Tube Connection (B)
Copper Tube Size	For Tube OD	Copper Tube Size	For Tube OD	Material	Max. Pressure	Specifications Met		Each
For Use With Drinking Water
4	4 1/8"	2	2 1/8"	Copper	200 psi @ 72° F	ASME B16.22, MSS-SP104, NSF/ANSI 61	00000000	0000000

Press-Connect Fittings for Copper Tubing

For Use With: Drinking Water
Maximum Pressure: Fittings compatible with Viega ProPress or Viega ProPress XL-C: 200 psi @ 72° F
Fittings compatible with Viega Pex or Viega PureFlow Press: 100 psi @ 72° F
Temperature Range: 0° to 250° F
Tubing: Fittings compatible with Viega ProPress or Viega ProPress XL-C: Use with K, M, L copper
Fittings compatible with Viega Pex or Viega PureFlow Press: Use with hard polyethylene plastic
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.

Straight Adapters, Female Press-Connect Tube × Male Threaded Pipe

NPT Threads
Copper Tube Size	For Tube OD	Pipe Size	Lg.	Material	Compatible With	Specifications Met		Each
4	4 1/8"	4	5 29/64"	Copper	Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	0000000

Straight Adapters, Female Press-Connect Tube × Female Threaded Pipe

NPT Threads
Copper Tube Size	For Tube OD	Pipe Size	Lg.	Material	Compatible With	Specifications Met		Each
4	4 1/8"	4	5 35/64"	Copper	Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	0000000

Straight Adapters, Female Press-Connect Tube × Flanged Pipe

Straight adapters with flanged end bolt to equipment or other flanged connections found on pumps and valves to create a convenient access point.

					Bolt Hole
Copper Tube Size	For Tube OD	Pipe Size	Flange OD	Bolt Circle Dia.	Dia.	No. of	For Bolt Dia.	Bolts Included	Lg.	Material	Flange Material	Compatible With	Specifications Met		Each
4	4 1/8"	4	9 1/16"	7 33/64"	3/4"	8	5/8"	No	3 21/32"	Copper	Powder-Coated Steel	Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	0000000

Straight Connectors with Center Stop, Female Press-Connect Tube

Copper Tube Size	For Tube OD	Lg.	Material	Compatible With	Specifications Met		Each
4	4 1/8"	5 51/64"	Copper	Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	0000000

Straight Connectors with Smooth Interior, Female Press-Connect Tube

Straight connectors with smooth interior are for use in tight spots when your line can’t be moved. Unlike straight connectors with a stop, these slide onto tubing and can be moved up and down for easy positioning. They are also known as repair couplings.

Copper Tube Size	For Tube OD	Lg.	Material	Compatible With	Specifications Met		Each
4	4 1/8"	5 61/64"	Copper	Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	0000000

Straight Reducers with Center Stop, Female Press-Connect Tube

Tube Connection (A)		Tube Connection (B)
Copper Tube Size	For Tube OD	Copper Tube Size	For Tube OD	Lg.	Material	Compatible With	Specifications Met		Each
4	4 1/8"	2	2 1/8"	6"	Copper	Viega ProPress, Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	0000000
4	4 1/8"	2 1/2	2 5/8"	5 63/64"	Copper	Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	000000
4	4 1/8"	3	3 1/8"	6 1/32"	Copper	Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	000000

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	Compatible With	Specifications Met		Each
4	4 1/8"	2	2 1/8"	6 11/64"	Copper	Viega ProPress, Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	0000000
4	4 1/8"	2 1/2	2 5/8"	6 5/32"	Copper	Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	000000
4	4 1/8"	3	3 1/8"	6 9/64"	Copper	Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	000000

90° Elbow 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	Material	Compatible With	Specifications Met		Each
4	4 1/8"	4	4 1/8"	Copper	Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	0000000

90° Elbow Connectors, Female Press-Connect Tube

Copper Tube Size	For Tube OD	Material	Compatible With	Specifications Met		Each
4	4 1/8"	Copper	Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	0000000	0000000

45° Elbow 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	Material	Compatible With	Specifications Met		Each
4	4 1/8"	4	4 1/8"	Copper	Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	0000000

45° Elbow Connectors, Female Press-Connect Tube

Copper Tube Size	For Tube OD	Material	Compatible With	Specifications Met		Each
4	4 1/8"	Copper	Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	0000000

Inline Tee Adapters, Female Press-Connect Tube × Female Threaded Pipe

Inline tees are also known as branch tees. Use inline tee adapters to add lines or components, such as gauges, without additional fittings.

NPT Threads
Copper Tube Size	For Tube OD	Pipe Size	Material	Compatible With	Specifications Met		Each
4	4 1/8"	3/4	Copper	Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	0000000

Tee Connectors, Female Press-Connect Tube

Copper Tube Size	For Tube OD	Material	Compatible With	Specifications Met		Each
4	4 1/8"	Copper	Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	0000000	0000000

Inline Tee Reducers, Female Press-Connect Tube

Inline tees are also known as branch tees.

Tube Connection (A)		Tube Connection (B)		Tube Connection (C)
Copper Tube Size	For Tube OD	Copper Tube Size	For Tube OD	Copper Tube Size	For Tube OD	Material	Compatible With	Specifications Met		Each
4	4 1/8"	1 1/2	1 5/8"	4	4 1/8"	Copper	Viega ProPress, Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	0000000
4	4 1/8"	2	2 1/8"	4	4 1/8"	Copper	Viega ProPress, Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	000000
4	4 1/8"	2 1/2	2 5/8"	4	4 1/8"	Copper	Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	000000

Dual Tee Reducers, Female Press-Connect Tube

Tube Connection (A)		Tube Connection (B)		Tube Connection (C)
Copper Tube Size	For Tube OD	Copper Tube Size	For Tube OD	Copper Tube Size	For Tube OD	Material	Compatible With	Specifications Met		Each
4	4 1/8"	2	2 1/8"	3	3 1/8"	Copper	Viega ProPress, Viega ProPress XL-C	ASME B16.51, ASME B31.1, ASME B31.3, ASME B31.9, NSF/ANSI 61, UL 213	00000000	0000000

Replacement O-Rings

For Copper Tube Size	For Tube OD	O-Ring Material	Compatible With		Each
1 1/2	1 5/8"	EPDM Rubber	Viega ProPress	00000000	00000
2	2 1/8"	EPDM Rubber	Viega ProPress	00000000	0000

Crimping Tools with Six Jaws

Jaws for copper tube sizes ½ to 2 fit directly into the included crimping tool.

			Battery
For Copper Tube Size	For Tube OD	Voltage	No. Included	Cap., amp-hrs.	Battery Charger Included	Battery Charging Time, min.	Compatible With	Specifications Met		Each
1/2, 3/4, 1, 1 1/4, 1 1/2, 2	5/8", 7/8", 1 1/8", 1 3/8", 1 5/8", 2 1/8"	18V DC	2	3	Yes	39	Viega ProPress	EMC 2011/65/EU, EMC 2014/30/EU, IEC 62841-1, UL 62841-1	00000000	000000000

Crimping Rings

Rings for copper tube sizes 2 ½ to 4 include a jaw actuator. Clip the rings around the fitting and use the jaw actuator and crimping tool (sold separately) to press the open ends together.

For Copper Tube Size	For Tube OD	Includes	Compatible With		Each
2 1/2, 3, 4	2 5/8", 3 1/8", 4 1/8"	Three Rings (2 1/2-4 Copper Tube Size) One Ring Actuator Jaw	Viega ProPress XL-C	00000000	000000000

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How to Identify and Measure Fittings

Solder-Connect Fittings for Copper Tubing

Press-Connect Fittings for Copper Tubing