HDPE Pipe Fittings | McMaster-Carr

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116 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: -25° to 130° F
Tubing: Use with soft or firm (Durometer 50A-90A) polyurethane rubber or PVC plastic
Specifications Met: FDA Compliant 21 CFR 177.1520

A smooth interior reduces friction and prevents product buildup, ensuring an unrestricted flow. Fittings have a single barb that creates a smooth clamping surface for extra-tight connections that minimize leaks. Fittings are polyethylene plastic for excellent strength.

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

Straight Adapters, Tube × Male Threaded Pipe

NPT Threads
For Tube ID	Pipe Size	Thread Size	Thread Pitch, mm	Material	Color	Max. Pressure	Pkg. Qty.		Pkg.
1/8"	1/8	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	000000
5/32"	1/8	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/16"	1/8	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/16"	1/4	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/4"	1/8	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/4"	1/4	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/4"	3/8	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/4"	1/2	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/4"	3/4	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/8"	1/8	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/8"	1/4	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/8"	3/8	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/8"	1/2	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/8"	3/4	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/2"	1/4	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/2"	3/8	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/2"	1/2	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/2"	3/4	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/4"	1/2	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/4"	3/4	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1"	3/4	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1"	1	__	__	Polyethylene Plastic	White	Not Rated	10	0000000	00000
Metric Threads
3/32"	__	M6	1	Polyethylene Plastic	White	Not Rated	10	00000000	00000

Straight Connectors, Tube

For Tube ID	Material	Color	Max. Pressure	Pkg. Qty.		Pkg.
1/16"	Polyethylene Plastic	White	Not Rated	10	00000000	000000
3/32"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
1/8"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
5/32"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
3/16"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
1/4"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
5/16"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
3/8"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
1/2"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
5/8"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
3/4"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
1"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
5mm	Polyethylene Plastic	White	Not Rated	10	00000000	00000
6mm	Polyethylene Plastic	White	Not Rated	10	00000000	00000
7mm	Polyethylene Plastic	White	Not Rated	10	00000000	00000
10mm	Polyethylene Plastic	White	Not Rated	10	00000000	00000

90° Elbow Adapters, Tube × Male Threaded Pipe

NPT Threads
For Tube ID	Pipe Size	Material	Color	Max. Pressure	Pkg. Qty.		Pkg.
1/8"	1/8	Polyethylene Plastic	White	Not Rated	10	0000000	000000
5/32"	1/8	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/16"	1/8	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/16"	1/4	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/4"	1/8	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/4"	1/4	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/4"	3/8	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/4"	1/2	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/8"	1/8	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/8"	1/4	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/8"	3/8	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/8"	1/2	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/8"	3/4	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/2"	1/4	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/2"	3/8	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/2"	1/2	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/2"	3/4	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/4"	1/2	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/4"	3/4	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1"	3/4	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1"	1	Polyethylene Plastic	White	Not Rated	10	0000000	00000

90° Elbow Connectors, Tube

For Tube ID	Material	Color	Max. Pressure	Pkg. Qty.		Pkg.
1/16"	Polyethylene Plastic	White	Not Rated	10	00000000	000000
3/32"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
1/8"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
5/32"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
3/16"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
1/4"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
5/16"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
3/8"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
1/2"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
5/8"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
3/4"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
1"	Polyethylene Plastic	White	Not Rated	10	00000000	00000

Inline Tee Adapters, Tube × Male Threaded Pipe

Inline tees are also known as branch tees.

NPT Threads
For Tube ID	Pipe Size	Material	Color	Max. Pressure	Pkg. Qty.		Pkg.
1/8"	1/8	Polyethylene Plastic	White	Not Rated	5	0000000	000000
3/16"	1/8	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/16"	1/4	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/4"	1/8	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/4"	1/4	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/8"	1/8	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/8"	1/4	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/8"	3/8	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/8"	1/2	Polyethylene Plastic	White	Not Rated	10	0000000	00000
3/8"	3/4	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/2"	1/4	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/2"	3/8	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/2"	1/2	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1/2"	3/4	Polyethylene Plastic	White	Not Rated	10	0000000	00000
1"	1	Polyethylene Plastic	White	Not Rated	10	0000000	00000

Tee Connectors, Tube

For Tube ID	Material	Color	Max. Pressure	Pkg. Qty.		Pkg.
1/16"	Polyethylene Plastic	White	Not Rated	10	00000000	000000
3/32"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
1/8"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
5/32"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
3/16"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
1/4"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
5/16"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
3/8"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
1/2"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
5/8"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
3/4"	Polyethylene Plastic	White	Not Rated	10	00000000	00000
1"	Polyethylene Plastic	White	Not Rated	10	00000000	00000

Wye Connectors, Tube

For Tube ID	Material	Color	Max. Pressure	Pkg. Qty.		Pkg.
1/8"	Polyethylene Plastic	White	Not Rated	5	00000000	000000
3/16"	Polyethylene Plastic	White	Not Rated	5	00000000	00000
1/4"	Polyethylene Plastic	White	Not Rated	5	00000000	00000
3/8"	Polyethylene Plastic	White	Not Rated	5	00000000	00000
1/2"	Polyethylene Plastic	White	Not Rated	5	00000000	00000

Underground Snap-Lock Polyethylene Pipe Fittings for Drain, Waste, and Vent

For Use With: Water
Specifications Met: ASTM F667

The snap-together design allows you to quickly connect these fittings to pipe with no cement required. Fittings are typically used in gravity-flow drainage applications. Made of high-density polyethylene (HDPE), they stand up to freeze/thaw cycles and resist corrosion and stress cracking. Fittings meet ASTM F667 specifications and testing requirements for material quality as well as soil conservation service (SCS) standards for use in underground drain lines.

Offset straight adapters are also known as eccentric adapters; they have offset centers so the line can drain. Cut the tapered opening to 3 1/2” x 2 1/2” or 4” x 2 3/4”.

Warning: Never use plastic pipe fittings and pipe with compressed air or gas. Do not expose fittings to direct sunlight.

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

Straight Connectors, Male Socket Connect

Pipe Size	OD	Material	Color		Each
3	3"	Polyethylene Plastic	Black	00000000	00000
4	4"	Polyethylene Plastic	Black	00000000	0000

Straight Adapters, Male Socket Connect × Female Socket Connect

		Opening
Pipe Size	OD	Wd.	Ht.	Socket Dp.	Material	Color		Each
3	3"	3 3/8"	2"	2"	Polyethylene Plastic	Black	00000000	00000

Offset Straight Adapters, Male Socket Connect × Female Socket Connect

		Opening
Pipe Size	OD	Wd.	Ht.	Socket Dp.	Material	Color		Each
4	4"	3"	2"	1 29/32"	Polyethylene Plastic	Black	00000000	00000

90° Elbow Connectors, Female Socket Connect

Pipe Size	Socket Dp.	Material	Color		Each
3	1 29/32"	Polyethylene Plastic	Black	000000000	000000
4	1 25/32"	Polyethylene Plastic	Black	000000000	00000

Tee Connectors, Female Socket Connect

Pipe Size	Socket Dp.	Material	Color		Each
3	2"	Polyethylene Plastic	Black	000000000	000000
4	1 25/32"	Polyethylene Plastic	Black	000000000	00000

Wye Connectors, Female Socket Connect

Pipe Size	Socket Dp.	Material	Color		Each
3	1 29/32"	Polyethylene Plastic	Black	000000000	000000
4	__	Polyethylene Plastic	Black	000000000	00000

Caps, Female Socket Connect

Pipe Size	Socket Dp.	Material	Color		Each
3	2 13/64"	Polyethylene Plastic	Black	00000000	00000
4	2 45/64"	Polyethylene Plastic	Black	00000000	0000

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How to Identify and Measure Fittings

Super-Flow Plastic Barbed Tube Fittings for Food and Beverage

Underground Snap-Lock Polyethylene Pipe Fittings for Drain, Waste, and Vent