CPVC Pipe Unions | McMaster-Carr

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50 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.

Selecting and Measuring Expansion Joints

For information about selecting pipe size, see Selecting and Measuring Pipe & Fittings.

Made of CPVC, these fittings can handle high temperatures. They have thick, strong walls to handle heavy duty industrial plumbing and water supply applications, such as water processing and waste water treatment. They also have good corrosion resistance. These fittings are comparable to Corzan. Some meet ASTM D1784 specifications and testing requirements for material quality.

Fittings for drinking water meet NSF/ANSI Standard 61.

Schedule 80 fittings have thick, strong walls for heavy duty, industrial applications.

Note: For fittings that are not rated for pressure, you can use the pressure rating of the plastic pipe as a reference. Threaded fittings are limited to 50% of the rated pressure of the pipe.

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

Sealants cannot be sold to Colorado, Connecticut, District of Columbia, Delaware, Illinois, Indiana, Massachusetts, Maryland, Maine, Michigan, New Hampshire, New Jersey, Northern Virginia, New York, Ohio, Pennsylvania, Rhode Island, or Utah due to local regulatory limits on VOCs (Volatile Organic Compounds).

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

Union Straight Connectors, Female Socket Connect

Exploded View

For Use With: Acetic Acid (10%), Calcium Chloride, Deionized Water, Drinking Water, Hydrochloric Acid (25%), Nitric Acid (10%), Phosphoric Acid (85%), Salt Water, Sulfuric Acid (75%), Water
Maximum Temperature: 200° F
Specifications Met: ASTM D1784, NSF/ANSI 61
Pipe Nipples and Pipe: Use Schedule 80 CPVC Plastic
Flanges: Use Class 150 CPVC Plastic

Attach socket-connect ends to unthreaded pipe or another socket-connect fitting with a CPVC primer and cement (also known as solvent weld).

Unions separate into three pieces so you can access your line.

Pipe Size	Socket Depth	Material	O-Ring Material	Schedule	Color	Max. Pressure		Each
1/4	5/8"	CPVC Plastic	Viton® Fluoroelastomer Rubber	80	Light Gray	Not Rated	0000000	000000
3/8	25/32"	CPVC Plastic	EPDM Rubber	80	Light Gray	Not Rated	00000000	00000
1/2	15/16"	CPVC Plastic	Viton® Fluoroelastomer Rubber	80	Light Gray	Not Rated	0000000	00000
3/4	1 1/16"	CPVC Plastic	Viton® Fluoroelastomer Rubber	80	Light Gray	Not Rated	0000000	00000
1	1 3/16"	CPVC Plastic	Viton® Fluoroelastomer Rubber	80	Light Gray	Not Rated	0000000	00000
1 1/4	1 5/16"	CPVC Plastic	Viton® Fluoroelastomer Rubber	80	Light Gray	Not Rated	0000000	00000
1 1/2	1 7/16"	CPVC Plastic	Viton® Fluoroelastomer Rubber	80	Light Gray	Not Rated	0000000	00000
2	1 19/32"	CPVC Plastic	Viton® Fluoroelastomer Rubber	80	Light Gray	Not Rated	0000000	00000
2 1/2	1 3/4"	CPVC Plastic	EPDM Rubber	80	Light Gray	Not Rated	00000000	000000
3	1 31/32"	CPVC Plastic	Viton® Fluoroelastomer Rubber	80	Light Gray	Not Rated	0000000	000000
4	2 1/4"	CPVC Plastic	EPDM Rubber	80	Light Gray	Not Rated	0000000	000000
6	3 1/32"	CPVC Plastic	EPDM Rubber	80	Light Gray	Not Rated	0000000	000000

Union Straight Connectors, DIN Metric Female Socket Connect

Exploded View

For Use With: Acetic Acid (10%), Calcium Chloride, Citric Acid, Formic Acid (25%), Hydrochloric Acid (30%), Nitric Acid (65%), Sulfuric Acid (95%), Water
Maximum Temperature: 170° F
Specifications Met: ISO 15493
Pipe Nipples and Pipe: Use CPVC Plastic
Flanges: Use Class 150 CPVC Plastic

Attach socket-connect ends to unthreaded pipe or another socket-connect fitting with a CPVC primer and cement (also known as solvent weld).

Unions separate into three pieces so you can access your line.

DIN Size, mm	Socket Depth, mm	Material	O-Ring Material	Color	Max. Pressure		Each
32	24	CPVC Plastic	EPDM Rubber	Light Gray	230 psi @ 72° F	00000000	000000
50	30	CPVC Plastic	EPDM Rubber	Light Gray	230 psi @ 72° F	00000000	000000
63	37	CPVC Plastic	EPDM Rubber	Light Gray	230 psi @ 72° F	00000000	000000

Union Straight Connectors, Female Threaded Pipe

Exploded View

For Use With:
Fittings with EPDM Rubber O-Rings: Drinking Water, Water
All other fittings: Acetic Acid (10%), Calcium Chloride, Deionized Water, Drinking Water, Hydrochloric Acid (25%), Nitric Acid (10%), Phosphoric Acid (85%), Salt Water, Sulfuric Acid (75%), Water
Maximum Temperature: 200° F
Specifications Met: ASTM D1784, NSF/ANSI 61
Pipe Nipples and Pipe: Use Schedule 80 CPVC Plastic
Flanges: Use Class 150 CPVC Plastic

To prevent leaks in threaded connections, apply a non-hardening, plastic-compatible sealant to the male threads. Tape or sealants with PTFE are not recommended for plastic-to-plastic threaded connections. When making a threaded connection be careful not to overtighten the threads. To prevent cracks and leaks, finger tighten the fitting, then wrench-tighten one to two turns.

Unions separate into three pieces so you can access your line.

NPT Threads
Pipe Size	Material	O-Ring Material	Schedule	Color	Max. Pressure		Each
1/4	CPVC Plastic	EPDM Rubber	80	Light Gray	Not Rated	0000000	000000
3/8	CPVC Plastic	Viton® Fluoroelastomer Rubber	80	Light Gray	Not Rated	0000000	00000
1/2	CPVC Plastic	Viton® Fluoroelastomer Rubber	80	Light Gray	Not Rated	0000000	00000
3/4	CPVC Plastic	Viton® Fluoroelastomer Rubber	80	Light Gray	Not Rated	0000000	00000
1	CPVC Plastic	Viton® Fluoroelastomer Rubber	80	Light Gray	Not Rated	0000000	00000
1 1/4	CPVC Plastic	Viton® Fluoroelastomer Rubber	80	Light Gray	Not Rated	0000000	00000
1 1/2	CPVC Plastic	Viton® Fluoroelastomer Rubber	80	Light Gray	Not Rated	0000000	00000
2	CPVC Plastic	Viton® Fluoroelastomer Rubber	80	Light Gray	Not Rated	0000000	00000
2 1/2	CPVC Plastic	EPDM Rubber	80	Light Gray	Not Rated	00000000	000000
3	CPVC Plastic	EPDM Rubber	80	Light Gray	Not Rated	00000000	000000
4	CPVC Plastic	EPDM Rubber	80	Light Gray	Not Rated	00000000	000000

Union Straight Adapters, Female Socket Connect × DIN Metric Female Socket Connect

Exploded View

For Use With: Acetic Acid (10%), Calcium Chloride, Deionized Water, Drinking Water, Hydrochloric Acid (25%), Nitric Acid (10%), Phosphoric Acid (85%), Salt Water, Sodium Hydroxide (50%), Sulfuric Acid (75%), Water
Maximum Temperature: 200° F
Specifications Met: ASTM D1784, NSF/ANSI 61
Pipe Nipples and Pipe: Use Schedule 80 CPVC Plastic
Flanges: Use Class 150 CPVC Plastic

Attach socket-connect ends to unthreaded pipe or another socket-connect fitting with a CPVC primer and cement (also known as solvent weld).

Unions separate into three pieces so you can access your line.

Female Socket Connection		DIN Metric Female Socket Connection
Pipe Size	Socket Depth	DIN Size	Socket Depth, mm	Material	O-Ring Material	Schedule	Color	Max. Pressure		Each
1/2	7/8"	20	22	CPVC Plastic	EPDM Rubber	80	Light Gray	230 psi @ 72° F	00000000	000000
1/2	1"	25	26	CPVC Plastic	EPDM Rubber	80	Light Gray	230 psi @ 72° F	00000000	00000
1	1 1/8"	32	29	CPVC Plastic	EPDM Rubber	80	Light Gray	230 psi @ 72° F	00000000	00000
1 1/4	1 1/4"	40	33	CPVC Plastic	EPDM Rubber	80	Light Gray	230 psi @ 72° F	00000000	00000
1 1/2	1 3/8"	50	36	CPVC Plastic	EPDM Rubber	80	Light Gray	230 psi @ 72° F	00000000	00000

Pipe Cement for Max. Pipe Size 90 mm

00000000

Each

000000

Union Straight Adapters, DIN Metric Female Socket Connect × Female Socket Connect

Exploded View

For Use With: Acetic Acid (10%), Calcium Chloride, Citric Acid, Formic Acid (25%), Hydrochloric Acid (30%), Nitric Acid (65%), Sulfuric Acid (95%), Water
Maximum Temperature: 170° F
Specifications Met: ISO 15493, ISO 7-1
Pipe Nipples and Pipe: Use CPVC Plastic
Flanges: Use Class 150 CPVC Plastic

Attach socket-connect ends to unthreaded pipe or another socket-connect fitting with a CPVC primer and cement (also known as solvent weld).

Unions separate into three pieces so you can access your line.

DIN Metric Female Socket Connection		Female Socket Connection
DIN Size, mm	Socket Depth, mm	Pipe Size	Socket Depth, mm	Material	O-Ring Material	Color	Max. Pressure		Each
16	14	3/8	19	CPVC Plastic	EPDM Rubber	Light Gray	150 psi @ 72 ° F	00000000	000000
20	16	1/2	20	CPVC Plastic	EPDM Rubber	Light Gray	150 psi @ 72 ° F	00000000	00000
40	26	1 1/4	32	CPVC Plastic	EPDM Rubber	Light Gray	150 psi @ 72 ° F	00000000	000000
63	37	2	38	CPVC Plastic	EPDM Rubber	Light Gray	150 psi @ 72 ° F	00000000	000000

Union Straight Adapters, Female Socket Connect × Female Threaded Pipe

Exploded View

For Use With: Drinking Water, Water
Maximum Temperature: 200° F
Specifications Met: ASTM D1784, NSF/ANSI 61
Pipe Nipples and Pipe: Use Schedule 80 CPVC Plastic
Flanges: Use Class 150 CPVC Plastic

Attach socket-connect ends to unthreaded pipe or another socket-connect fitting with a CPVC primer and cement (also known as solvent weld).

Unions separate into three pieces so you can access your line.

NPT Threads
Pipe Size	Socket Depth	Material	O-Ring Material	Schedule	Color	Max. Pressure		Each
1/2	7/8"	CPVC Plastic	EPDM Rubber	80	Light Gray	Not Rated	00000000	000000
3/4	1"	CPVC Plastic	EPDM Rubber	80	Light Gray	Not Rated	00000000	00000
1	1 1/8"	CPVC Plastic	EPDM Rubber	80	Light Gray	Not Rated	00000000	00000
1 1/4	1 1/4"	CPVC Plastic	EPDM Rubber	80	Light Gray	Not Rated	00000000	00000
1 1/2	1 3/8"	CPVC Plastic	EPDM Rubber	80	Light Gray	Not Rated	00000000	00000
2	1 1/2"	CPVC Plastic	EPDM Rubber	80	Light Gray	Not Rated	00000000	00000
2 1/2	1 3/4"	CPVC Plastic	EPDM Rubber	80	Light Gray	Not Rated	00000000	000000
3	1 7/8"	CPVC Plastic	EPDM Rubber	80	Light Gray	Not Rated	00000000	000000
4	2 1/4"	CPVC Plastic	EPDM Rubber	80	Light Gray	Not Rated	00000000	000000

Expansion Joints with Socket Connection for Plastic Pipe

Reduce stress, vibration, and noise in your plastic socket-connect piping system by creating a point of flexibility. These expansion joints have a double-bulb design, so they absorb even more movement and vibration than other expansion joints. Their body is EPDM rubber that's reinforced with nylon for added strength.

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.

For CPVC Plastic

For Use With: Alcohol, Water
Temperature Range: 40° to 200° F
Maximum Pressure: 150 psi @ 72° F
Maximum Vacuum: 26 in. of Hg @ 72° F
Pipe Nipples and Pipe: Use Schedule 80 CPVC Plastic

To attach joints, connect to unthreaded male socket-connect fittings or pipe using a CPVC primer and cement (also known as solvent weld).

Expansion Joints
			Distance						Pipe Cement
Pipe Size	Socket Dp.	Lg.	Compression	Expansion	Offset	Expansion Joint Type		Each		Each
EPDM Rubber
3/4	1"	8 3/8"	7/8"	1/4"	7/8"	Double Bulb	0000000	0000000	00000000	000000
1	1 1/8"	8 3/16"	7/8"	1/4"	7/8"	Double Bulb	0000000	000000	00000000	00000
1 1/2	1 3/8"	8 5/8"	7/8"	1/4"	7/8"	Double Bulb	0000000	000000	00000000	00000
2	1 1/2"	8 7/16"	7/8"	1/4"	7/8"	Double Bulb	0000000	000000	00000000	00000
3	1 29/32"	10"	7/8"	1/4"	7/8"	Double Bulb	0000000	00000000	00000000	00000

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How to Identify and Measure Fittings

Selecting and Measuring Expansion Joints

CPVC Pipe Fittings for Hot Water

Expansion Joints with Socket Connection for Plastic Pipe