ISO 7279 Pipe Fittings | McMaster-Carr

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Maximum Pressure @ Temperature

150 psi @ 72° F

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NPT

Food Industry Standard

FDA Standard

NSF/ANSI 61

For Pipe Standard Dimension Ratio

SDR11

Maximum Temperature

100° F to 249° F

Export Control Classification Number (ECCN)

EAR99

Interior Smoothness

12 Ra

DFARS Specialty Metals

REACH

RoHS

Minimum Temperature

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Length

92 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.

High-Purity Polypropylene Pipe Fittings for Corrosive Chemicals

The inside of these fittings won’t leach contaminants into your line or accumulate particles—they’re polished to an ultra-smooth 12 Ra finish, which also makes them easy to clean. Made of polypropylene, they resist organic solvents, acids, and alkalis better than CPVC fittings. These fittings meet NSF/ANSI 61 for use with drinking water, and they’re FDA compliant for direct contact with food. They also meet ASTM requirements for material and performance, and ISO requirements for dimensions.

Connect them to pipe with socket fusion welding for a strong, permanent bond. Use a socket fusion tool with a heater bushing (sold separately) that matches your pipe size.

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

Straight Connectors, Female Socket Fusion Connect

For Use With: Deionized Water, Drinking Water, Hydrochloric Acid, Phosphoric Acid, Salt Water, Solvents
Temperature Range: 32° to 200° F
Specifications Met: ASTM D2837, ASTM D4101, FDA Compliant 21 CFR 177.1520, FDA Compliant 21 CFR 178.3297, ISO 7279, NSF/ANSI 61
Pipe Nipples and Pipe: Use SDR 11 Polypropylene Plastic
Flanges: Use Polypropylene Plastic

Pipe Size	Socket Dp.	Material	Color	Max. Pressure		Each
1/2	19/32"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	000000
3/4	5/8"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
1	45/64"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
1 1/2	15/16"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
2	1 1/16"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000

Union Straight Connectors, Female Socket Fusion Connect

For Use With: Deionized Water, Drinking Water, Hydrochloric Acid, Phosphoric Acid, Salt Water, Solvents
Temperature Range: 32° to 200° F
Specifications Met: ASTM D2837, ASTM D4101, FDA Compliant 21 CFR 177.1520, FDA Compliant 21 CFR 178.3297, ISO 7279, NSF/ANSI 61
Pipe Nipples and Pipe: Use SDR 11 Polypropylene Plastic
Flanges: Use Polypropylene Plastic

Union connectors separate into three pieces, so you can access your line without unthreading pipe connections.

EPDM Rubber O-Ring
Pipe Size	Socket Dp.	Material	Color	Max. Pressure		Each
1/2	19/32"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	0000000
3/4	5/8"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	000000
1	45/64"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	000000
1 1/2	15/16"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	000000
2	1 1/16"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	000000
Viton® Fluoroelastomer Rubber O-Ring
1/2	19/32"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	000000
3/4	5/8"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	000000
1	45/64"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	000000
1 1/2	15/16"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	000000
2	1 1/16"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	000000

Straight Adapters, Female Socket Fusion Connect × Female Threaded Pipe

For Use With: Deionized Water, Drinking Water, Hydrochloric Acid, Phosphoric Acid, Salt Water, Solvents
Temperature Range: 32° to 200° F
Specifications Met: ASTM D2837, ASTM D4101, FDA Compliant 21 CFR 177.1520, FDA Compliant 21 CFR 178.3297, ISO 7279, NSF/ANSI 61
Pipe Nipples and Pipe: Use SDR 11 Polypropylene Plastic
Flanges: Use Polypropylene Plastic

Threaded fittings can be disconnected as needed for maintenance and repair. To prevent leaks and cracks, apply thread sealant tape (sold separately) to the male threads, and don’t overtighten them. First tighten by hand, then use a wrench to tighten one or two more turns.

NPT Threads
Pipe Size	Socket Dp.	Material	Color	Max. Pressure		Each
1/2	33/64"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	000000
3/4	19/32"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
1	5/8"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
1 1/2	53/64"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	000000
2	15/16"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	000000

Straight Adapters, Male Socket Fusion Connect × Male Threaded Pipe

For Use With: Deionized Water, Drinking Water, Hydrochloric Acid, Phosphoric Acid, Salt Water, Solvents
Temperature Range: 32° to 200° F
Specifications Met: ASTM D2837, ASTM D4101, FDA Compliant 21 CFR 177.1520, FDA Compliant 21 CFR 178.3297, ISO 7279, NSF/ANSI 61
Pipe Nipples and Pipe: Use SDR 11 Polypropylene Plastic
Flanges: Use Polypropylene Plastic

NPT Threads
Pipe Size	Material	Color	Max. Pressure		Each
1/2	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	000000
3/4	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
1	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
1 1/2	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
2	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	000000

Stub-End Straight Adapters, Female Socket Fusion Connect × Flanged

Straight Adapter with Flange

Straight Adapter

For Use With: Deionized Water, Drinking Water, Hydrochloric Acid, Phosphoric Acid, Salt Water, Solvents
Temperature Range: 32° to 200° F
Specifications Met: ASTM D2837, ASTM D4101, FDA Compliant 21 CFR 177.1520, FDA Compliant 21 CFR 178.3297, ISO 7279, NSF/ANSI 61
Pipe Nipples and Pipe: Use SDR 11 Polypropylene Plastic
Flanges: Use Polypropylene Plastic

Stub-end straight adapters connect flanges to pipe. Slide the straight end into a flange and fuse the stub end to the pipe. Since the flange isn’t fused to the pipe, it can be disconnected easily for cleaning and inspecting.

Adapters							Flanges
Pipe Size	Wall Thick.	Material	Color	Max. Pressure		Each		Each
1/2	0.119"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	000000	0000000	000000
3/4	0.138"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000	0000000	00000
1	0.138"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000	0000000	00000
1 1/2	0.195"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000	0000000	00000
2	0.178"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000	0000000	000000

Straight Reducing Adapters, Male Socket Fusion Connect × Female Socket Fusion Connect

For Use With: Deionized Water, Drinking Water, Hydrochloric Acid, Phosphoric Acid, Salt Water, Solvents
Temperature Range: 32° to 200° F
Specifications Met: ASTM D2837, ASTM D4101, FDA Compliant 21 CFR 177.1520, FDA Compliant 21 CFR 178.3297, ISO 7279, NSF/ANSI 61
Pipe Nipples and Pipe: Use SDR 11 Polypropylene Plastic
Flanges: Use Polypropylene Plastic

(A)		(B)
Pipe Size	Socket Dp.	Pipe Size	Socket Dp.	Material	Color	Max. Pressure		Each
3/4	19/32"	1/2	19/32"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	000000
1	35/64"	1/2	35/64"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
1	5/8"	3/4	5/8"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
1 1/2	45/64"	1	45/64"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
2	45/64"	1	45/64"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
2	15/16"	1 1/2	15/16"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000

90° Elbow Connectors, Female Socket Fusion Connect

For Use With: Deionized Water, Drinking Water, Hydrochloric Acid, Phosphoric Acid, Salt Water, Solvents
Temperature Range: 32° to 200° F
Specifications Met: ASTM D2837, ASTM D4101, FDA Compliant 21 CFR 177.1520, FDA Compliant 21 CFR 178.3297, ISO 7279, NSF/ANSI 61
Pipe Nipples and Pipe: Use SDR 11 Polypropylene Plastic
Flanges: Use Polypropylene Plastic

Pipe Size	Socket Dp.	Material	Color	Max. Pressure		Each
1/2	19/32"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	0000000	000000
3/4	5/8"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
1	45/64"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
1 1/2	15/16"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
2	1 1/16"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000

45° Elbow Connectors, Female Socket Fusion Connect

For Use With: Deionized Water, Drinking Water, Hydrochloric Acid, Phosphoric Acid, Salt Water, Solvents
Temperature Range: 32° to 200° F
Specifications Met: ASTM D2837, ASTM D4101, FDA Compliant 21 CFR 177.1520, FDA Compliant 21 CFR 178.3297, ISO 7279, NSF/ANSI 61
Pipe Nipples and Pipe: Use SDR 11 Polypropylene Plastic
Flanges: Use Polypropylene Plastic

Pipe Size	Socket Dp.	Material	Color	Max. Pressure		Each
1/2	19/32"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	000000
3/4	5/8"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
1	45/64"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
1 1/2	15/16"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
2	1 1/16"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000

Tee Connectors, Female Socket Fusion Connect

For Use With: Deionized Water, Drinking Water, Hydrochloric Acid, Phosphoric Acid, Salt Water, Solvents
Temperature Range: 32° to 200° F
Specifications Met: ASTM D2837, ASTM D4101, FDA Compliant 21 CFR 177.1520, FDA Compliant 21 CFR 178.3297, ISO 7279, NSF/ANSI 61
Pipe Nipples and Pipe: Use SDR 11 Polypropylene Plastic
Flanges: Use Polypropylene Plastic

Pipe Size	Socket Dp.	Material	Color	Max. Pressure		Each
1/2	19/32"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	000000
3/4	5/8"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
1	45/64"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
1 1/2	15/16"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
2	1 7/64"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000

Caps, Female Socket Fusion Connect

For Use With: Deionized Water, Drinking Water, Hydrochloric Acid, Phosphoric Acid, Salt Water, Solvents
Temperature Range: 32° to 200° F
Specifications Met: ASTM D2837, ASTM D4101, FDA Compliant 21 CFR 177.1520, FDA Compliant 21 CFR 178.3297, ISO 7279, NSF/ANSI 61
Pipe Nipples and Pipe: Use SDR 11 Polypropylene Plastic
Flanges: Use Polypropylene Plastic

Pipe Size	Socket Dp.	Material	Color	Max. Pressure		Each
1/2	19/32"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	000000
3/4	5/8"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
1	45/64"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
1 1/2	15/16"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000
2	1 1/16"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	00000000	00000

Straight Ball Valves with Lockable Lever Handle, Female Socket Fusion Connect

For Use With: Deionized Water, Drinking Water, Hydrochloric Acid, Phosphoric Acid, Salt Water, Solvents
Temperature Range: 32° to 200° F
Specifications Met: ASTM D2837, ASTM D4101, FDA Compliant 21 CFR 177.1520, FDA Compliant 21 CFR 178.3297, ISO 7279, NSF/ANSI 61
Seal Material: See table
Seat Material: PTFE Plastic

Add a ball valve to control the flow in your line.

EPDM Rubber Seal
Pipe Size	Flow Coefficient (Cv)	Vacuum Rating, in. of Hg	Port Type	End-to-End Lg.	Color	Max. Pressure		Each
Polypropylene Plastic
1/2	12.5	29.92	Full	3 13/16"	Light Gray	150 psi @ 0° F	00000000	0000000
3/4	28	29.92	Full	4 9/32"	Light Gray	150 psi @ 0° F	00000000	000000
1	50.9	29.92	Full	4 23/32"	Light Gray	150 psi @ 0° F	00000000	000000
1 1/2	150	29.92	Full	6 1/16"	Light Gray	150 psi @ 0° F	00000000	000000
2	230	29.92	Full	6 13/16"	Light Gray	150 psi @ 0° F	00000000	000000
Viton® Fluoroelastomer Rubber Seal
Polypropylene Plastic
1/2	12.5	29.92	Full	3 13/16"	Light Gray	150 psi @ 0° F	00000000	000000
3/4	28	29.92	Full	4 9/32"	Light Gray	150 psi @ 0° F	00000000	000000
1	50.9	29.92	Full	4 23/32"	Light Gray	150 psi @ 0° F	00000000	000000
1 1/2	150	29.92	Full	6 1/16"	Light Gray	150 psi @ 0° F	00000000	000000
2	230	29.92	Full	6 13/16"	Light Gray	150 psi @ 0° F	00000000	000000

Socket Fusion Weld Tools

		Each
	00000000	0000000

Heater Bushings

For Pipe Size		Each
1/2	00000000	0000000
3/4	00000000	000000
1	00000000	000000
1 1/2	00000000	000000
2	00000000	000000

Thread Sealant Tape for Straight Adapters

Temperature Range: -450° to 550° F
Specifications Met: FDA Compliant 21 CFR 177.1550, MIL-T-27730, UL Listed

					Max. Pressure, psi			Each
For Max. Thread Dia.	Wd.	Lg., yd.	Density, g/cm³	Color	For Fluids	For Gases		1-11	12-Up
PTFE
0.0032" Thick.
1/2"	1/4"	14	0.7	White	10,000	10,000	0000000	00000	00000
3/4"	3/8"	14	0.7	White	10,000	10,000	0000000	0000	0000
1"	1/2"	14	0.7	White	10,000	10,000	0000000	0000	0000
1 1/2"	3/4"	14	0.7	White	10,000	10,000	0000000	0000	0000
2"	1"	14	0.7	White	10,000	10,000	0000000	0000	0000

High-Purity Polypropylene Pipe Flanges for Corrosive Chemicals

Front

Flat Surface on Back

For Use With: Deionized Water, Drinking Water, Hydrochloric Acid, Phosphoric Acid, Salt Water, Solvents
Pressure Class: 150
Temperature Range: 32° to 200° F
Specifications Met: ASTM D2837, ASTM D4101, FDA Compliant 21 CFR 177.1520, FDA Compliant 21 CFR 178.3297, ISO 7279, NSF/ANSI 61
Pipe Nipples and Pipe: Use SDR 11 Polypropylene Plastic
Fittings: Use Polypropylene Plastic

The inside of these flanges won’t leach contaminants into your line or accumulate particles—they’re polished to an ultra-smooth 12 Ra finish, which also makes them easy to clean. Made of polypropylene, they resist organic solvents, acids, and alkalis better than CPVC pipe flanges. Bolt two same-size flanges together with a gasket (not included) to create an access point in your line. These flanges meet NSF/ANSI 61 for use with drinking water, and they’re FDA compliant for direct contact with food. They also meet ASTM requirements for material and performance, and ISO requirements for dimensions.

Also known as lap-joint flanges, they connect to pipe with stub-end straight adapters (not included). Slide the stub end adapter into your flange and weld to your pipe with socket fusion. Since the flange isn’t welded to the pipe, it can be disconnected easily for cleaning and inspecting.

Flanges
			Bolt Hole								Adapters
Pipe Size	Flange OD	For Bolt Dia.	Dia.	No. of	Bolt Circle Dia.	Material	Color	Max. Pressure		Each		Each
Fixed Flanges, Stub End × Flanged
1/2	3 1/2"	1/2"	5/8"	4	2 3/8"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	0000000	000000	00000000	000000
3/4	3 7/8"	1/2"	5/8"	4	2 3/4"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	0000000	00000	00000000	00000
1	4 1/4"	1/2"	5/8"	4	3 1/8"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	0000000	00000	00000000	00000
1 1/2	5"	1/2"	5/8"	4	3 7/8"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	0000000	00000	00000000	00000
2	6"	5/8"	3/4"	4	4 3/4"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	0000000	000000	00000000	00000

High-Purity Polypropylene Pipe for Corrosive Chemicals

The inside of this pipe won’t leach contaminants into your line or accumulate particles—it’s polished to an ultra-smooth 12 Ra finish, which also makes it easy to clean. Made of polypropylene, it resists organic solvents, acids, and alkalis better than CPVC pipe. It meets NSF/ANSI 61 for use with drinking water, and it’s FDA compliant for direct contact with food. It also meets ASTM requirements for material and performance, and ISO requirements for dimensions. Also known as SDR 11 pipe.

Connect this pipe to fittings with socket fusion welding for a strong, permanent bond. Use a socket fusion tool with a heater bushing (sold separately) that matches your pipe size.

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

Unthreaded

For Use With: Deionized Water, Drinking Water, Hydrochloric Acid, Phosphoric Acid, Salt Water, Solvents
Temperature Range: 32° to 200° F
Specifications Met: ASTM D2837, ASTM D4101, FDA Compliant 21 CFR 177.1520, FDA Compliant 21 CFR 178.3297, ISO 7279, NSF/ANSI 61
Fittings: Use SDR 11 Polypropylene Plastic
Flanges: Use SDR 11 Polypropylene Plastic

4 ft.
Pipe Size	OD	ID	Wall Thick.	Material	Color	Max. Pressure		Each
1/2	25/32"	0.638"	0.075"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	0000000	000000
3/4	63/64"	0.803"	0.091"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	0000000	00000
1	1 17/64"	1.031"	0.114"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	0000000	00000
1 1/2	1 31/32"	1.606"	0.181"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	0000000	00000
2	2 31/64"	2.024"	0.228"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	0000000	00000
8 ft.
1/2	25/32"	0.638"	0.075"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	0000000	00000
3/4	63/64"	0.803"	0.091"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	0000000	00000
1	1 17/64"	1.031"	0.114"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	0000000	00000
1 1/2	1 31/32"	1.606"	0.181"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	0000000	00000
2	2 31/64"	2.024"	0.228"	Polypropylene Plastic	Light Gray	150 psi @ 72° F	0000000	000000

Socket Fusion Weld Tools

		Each
	00000000	0000000

Heater Bushings

For Pipe Size		Each
1/2	00000000	0000000
3/4	00000000	000000
1	00000000	000000
1 1/2	00000000	000000
2	00000000	000000