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.
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Low-Pressure Stainless Steel Threaded Pipe Fittings
Use these fittings in a low-pressure pipe line.
Fittings that meet ANSI/MSS SP-114 adhere to high-quality standards for heat treating, material thickness, and marking. 304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
Union connectors separate into three pieces so you can access your line without unthreading pipe connections.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Fabrication: Heat Treated
- Specifications Met:
NPT: ANSI/MSS SP-114, ASTM A351
BSPP and BSPT: ASNI/MSS SP-114 - Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Fabrication: Heat Treated
- Specifications Met:
NPT: ASTM A351
BSPT: DIN EN 10226 - Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Fabrication: Heat Treated
- Specifications Met:
NPT: ANSI/MSS SP-114, ASTM A351
BSPT: ANSI/MSS SP-114 - Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
Low-Pressure Stainless Steel Threaded Pipe Fittings with Sealant
The male threads on these fittings have a sealant applied for extra leak protection. Also known as Pressure Class 150 fittings, they are built for use in low-pressure applications. They adhere to high-quality standards for heat treating, material thickness, and marking.
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Steam, Water
- Pressure Class: 150
- Fabrication: Heat Treated
- Specifications Met: ASTM A351
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
Extreme-Pressure Stainless Steel Threaded Pipe Fittings
With the strength to handle extreme pressures, these fittings can be used to connect equipment in hydraulic fluid lines. 316 stainless steel fittings have excellent corrosion resistance.
NPTF (Dryseal) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
- Specifications Met: See table
- For Use With: See table
316 Stainless Steel | ||||||||
|---|---|---|---|---|---|---|---|---|
| Pipe Size (A)  | Dash Size (A) | Pipe Size (B) | Dash Size (B) | Max. Pressure | For Use With | Specifications Met | Each | |
BSPP Female × NPT Male | ||||||||
| 1/2 | 08 | 1/2 | 08 | 5,000 psi @ 72° F | Hydraulic Fluid, Oil, Water | ASME B1.20.3, ISO 1179, ISO 8434-6 | 0000000 | 000000 |
- For Use With: See table
- Specifications Met: See table
Pipe Size | Dash Size | 316 Stainless Steel | |||||||
|---|---|---|---|---|---|---|---|---|---|
| (A) | (B) | (A) | (B) | Max. Pressure | Max. Steam Pressure | For Use With | Specifications Met | Each | |
NPT Female | |||||||||
| 1 | 1/4 | 16 | 04 | 3,000 psi @ 72° F | 3,000 psi @ 200° F | Hydraulic Fluid, Oil, Steam, Water | SAE J514 | 000000000 | 000000 |
NPTF Female | |||||||||
| 1 | 3/4 | 16 | 12 | 3,600 psi @ 72° F | 3,600 psi @ 300° F | Hydraulic Fluid, Oil, Steam, Water | ASTM A479 | 000000000 | 00000 |
- For Use With: See table
- Specifications Met: See table
Pipe Size | Dash Size | 316 Stainless Steel | |||||||
|---|---|---|---|---|---|---|---|---|---|
| (A) | (B) | (A) | (B) | Max. Pressure | Max. Steam Pressure | For Use With | Specifications Met | Each | |
NPTF Male | |||||||||
| 3/4 | 3/8 | 12 | 06 | 7,300 psi @ 72° F | 7,300 psi @ 300° F | Hydraulic Fluid, Oil, Steam, Water | ASTM A479 | 000000000 | 000000 |
Low-Pressure Socket-Connect Stainless Steel Unthreaded Pipe Fittings
The highest-quality socket-connect fittings available, these meet ANSI/MSS SP-114 standards for heat treating, material thickness, and marking. Also known as Pressure Class 150 fittings, they are designed for low-pressure applications. Socket-connect fittings are easier to weld than butt-weld fittings because the fitting doesn’t need to align perfectly to the pipe. Slide pipe into the socket and weld for a strong, permanent connection.
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
Union straight connectors separate into three pieces for access to your line.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Natural Gas, Oil, Water
- Pressure Class: 150
- Fabrication: Heat Treated
- Specifications Met: ANSI/MSS SP-114, ASTM A351
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
High-Pressure Brass Threaded Pipe Fittings
These fittings have the strength to handle high-pressure applications. They are brass for good corrosion resistance.
NPTF (Dryseal) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Water, Natural Gas, Oil
- Specifications Met: See table
| Pipe Size | Max. Pressure | Each | |
NPT Female | |||
|---|---|---|---|
| 1 | 1,000 psi @ 72° F | 000000000 | 000000 |
Standard-Wall Steel Threaded Pipe Nipples and Pipe
Also known as Schedule 40, this pipe is designed for low-pressure applications. Use in noncorrosive applications.
Welded pipe has a weld bead on the inside.
Fully threaded pipe is also known as a close nipple; it is threaded on each end to the center.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Specifications Met: ASME B1.20.1, DIN EN 10226, ANSI/ASME BS21
- Fittings: Use Class 150 Iron and Steel
| Pipe Size | Lg. | Construction | Material | Each | |
| 1 1/2 | 1 49/64" | Welded | Steel | 00000000 | 000000 |
Standard-Wall Galvanized Steel Threaded Pipe Nipples and Pipe
Made of galvanized steel, this Schedule 40 pipe has fair corrosion resistance and is designed for low-pressure applications.
Fully threaded pipe is also known as a close nipple; it is threaded on each end to the center.
For technical drawings and 3-D models, click on a part number.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class: 150
- Specifications Met: ANSI/ASME BS21, DIN EN 10226, ASME B1.20.1
- Fittings: Use Class 150 galvanized iron and galvanized steel
- Flanges: Use Class 150 galvanized steel
| Pipe Size | Lg. | Construction | Each | |
| 1 1/2 | 1 49/64" | Welded | 00000000 | 000000 |
Compact Extreme-Pressure Steel Threaded Pipe Fittings
These fittings are strong enough to handle extreme pressures, yet small enough to fit into cramped spaces. They are galvanized and zinc-plated steel, which have better corrosion resistance than plain steel fittings.
NPTF (Dryseal) threads are compatible with NPT threads.
For technical drawings and 3-D models, click on a part number.
- For Use With:
NPTF: Air, Hydraulic Fluid, Water
Metric: Air, Hydraulic Fluid, Oil, Water - Specifications Met:
NPTF: ASTM A108
Metric: DIN 7631, ISO 6149, ISO 9974
Standard-Wall Plastic Pipe Fittings for Water
Connect these fittings to Schedule 40 plastic pipe–they are the industry standard for residential and commercial low-pressure plumbing and water supply applications. They are plastic for good corrosion resistance.
Fittings for drinking water meet NSF/ANSI Standard 61.
Attach socket-connect ends to unthreaded pipe or another socket-connect fitting with a PVC primer and cement (also known as solvent weld).
To prevent leaks in threaded connections, apply a sealant to the male threads. Threaded connections can be taken apart as needed for maintenance and repair. For plastic threads, apply a non-hardening, plastic-compatible sealant. Tape or sealants with PTFE are not recommended for plastic-to-plastic connections. Fittings that meet ASTM D1784, ASTM D1785, and ASTM D4066 adhere to specifications and testing requirements for material quality.
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.
For technical drawings and 3-D models, click on a part number.
- For Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: ASTM D1784, NSF/ANSI 14, NSF/ANSI 61
- Pipe Nipples and Pipe: Use Schedule 40 PVC Plastic
- Flanges: Use Class 150 PVC Plastic
| Pipe Size | Socket Depth | Garden Hose Trade Size | Material | Color | Each | |
GHT Threads | ||||||
|---|---|---|---|---|---|---|
| 1/2 | 61/64" | 3/4 | PVC Plastic | White | 00000000 | 00000 |
High-Purity PVDF Pipe Fittings for Corrosive Chemicals
Made of PVDF that’s finished to a 12 Ra smoothness, these fittings handle some of the harshest chemicals without leaching contaminants into your line. They won’t accumulate particles and are easy to clean, thanks to their smoothness. Comparable to Kynar, these fittings handle most organic solvents that would dissolve CPVC, and chlorine or nitric acid that would weaken polypropylene. You can use them at higher temperatures than CPVC and polypropylene. These fittings meet UL 94 V-0 and FM standards for flame retardance. They’re also FDA compliant for direct contact with food, and they meet ASTM requirements for dimensions and tolerances.
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.
For technical drawings and 3-D models, click on a part number.
- For Use With: Chlorine, Deionized Water, Hydrochloric Acid, Nitric Acid, Oil, Phosphoric Acid, Salt Water, Solvents
- Temperature Range: -40° to 270° F
- Specifications Met: ASTM D3261, FDA Compliant 21 CFR 177.2510, FM 4910, UL 94 V-0
- Pipe Nipples and Pipe: Use SDR 21 PVDF Plastic
- Flanges: Use PVDF Plastic
Union connectors separate into three pieces, so you can access your line without unthreading pipe connections.
| Pipe Size | Socket Dp. | Material | Color | Max. Pressure | Each | |
| 1/2 | 37/64" | PVDF Plastic | White | 230 psi @ 72° F | 0000000 | 0000000 |
- For Use With: Chlorine, Deionized Water, Hydrochloric Acid, Nitric Acid, Oil, Phosphoric Acid, Salt Water, Solvents
- Temperature Range: -40° to 270° F
- Specifications Met: ASTM D3222, FDA Compliant 21 CFR 177.2510, FM 4910, UL 94 V-0
- Seal Material: Viton® Fluoroelastomer Rubber
- Seat Material: PTFE Plastic
Add a ball valve to control the flow in your line.
| Pipe Size | Flow Coefficient (Cv) | Vacuum Rating, in. of Hg | Port Type | End-to-End Lg. | Color | Max. Pressure | Each | |
PVDF Plastic | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1/2 | 12.5 | 29.92 | Full | 3 13/16" | White | 230 psi @ 72° F | 0000000 | 0000000 |
| Includes | Each | |
| 5 Bushing Sets (1 each in 1/2, 3/4, 1, 1 1/2, and 2 Pipe Sizes) | 00000000 | 0000000 |
| For Pipe Size | Each | |
| 1/2 | 00000000 | 0000000 |
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.
For technical drawings and 3-D models, click on a part number.
- 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.
| Pipe Size | Socket Dp. | Material | Color | Max. Pressure | Each | |
NPT Threads | ||||||
|---|---|---|---|---|---|---|
| 1 | 5/8" | Polypropylene Plastic | Light Gray | 150 psi @ 72° F | 00000000 | 000000 |
- 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.
| Pipe Size | Flow Coefficient (Cv) | Vacuum Rating, in. of Hg | Port Type | End-to-End Lg. | Color | Max. Pressure | Each | |
EPDM Rubber Seal | ||||||||
|---|---|---|---|---|---|---|---|---|
Polypropylene Plastic | ||||||||
| 1 | 50.9 | 29.92 | Full | 4 23/32" | Light Gray | 150 psi @ 0° F | 00000000 | 0000000 |
Viton® Fluoroelastomer Rubber Seal | ||||||||
Polypropylene Plastic | ||||||||
| 1 | 50.9 | 29.92 | Full | 4 23/32" | Light Gray | 150 psi @ 0° F | 00000000 | 000000 |
| Includes | Each | |
| 5 Bushing Sets (1 each in 1/2, 3/4, 1, 1 1/2, and 2 Pipe Sizes) | 00000000 | 0000000 |
| For Pipe Size | Each | |
| 1 | 00000000 | 0000000 |
- 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" | 1/2" | 14 | 0.7 | White | 10,000 | 10,000 | 0000000 | 00000 | 00000 |
Gravity-Flow CPVC Pipe Fittings for Corrosive Chemical Waste
- For Use With: Hydrochloric Acid, Nitric Acid, Salt Water, Sulfuric Acid
- Temperature Range: 40° to 200° F
- Specifications Met: ASTM F2618, IAPMO Listed, NSF/ANSI 14, UL 94 V-0
Made of CPVC, these fittings have better chemical resistance than ABS plastic gravity-flow fittings and can stand up to highly-corrosive acids and other harsh substances. They meet NSF/ANSI 14 requirements for use in corrosive waste gravity-flow systems. Fittings are comparable to Corzan. They meet UL 94 V-0 for flame retardance and ASTM F2618 specifications and testing requirements for material quality. They are IAPMO certified to comply with the International Association for Plumbing and Mechanical Officials product performance standards and the Uniform Plumbing Code (UPC) for installation and repair of plumbing systems.
Attach socket-connect ends to unthreaded pipe or another socket-connect fitting with a CPVC primer and cement (also known as solvent weld).
To prevent leaks in threaded connections, apply a non-hardening, plastic-compatible sealant. 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.
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 VOC (Volatile Organic Compounds) regulations.
For technical drawings and 3-D models, click on a part number.
Cast Iron-to-PVC Pipe Adapters for Drain, Waste, and Vent
These adapters connect PVC waste pipe to cast iron pipe without adding bulk. Instead of securing pipes together from the outside like clamp-on couplings, these flexible adapters fit into cast iron pipe to create a tight compression seal. Adapters should fit tightly—tap with a mallet to install. Made of PVC, these fittings won't corrode when exposed to water.
For technical drawings and 3-D models, click on a part number.
- For Use With: Water
- Temperature Range: -30° to 140° F
- Specifications Met: ASTM D5926
| Pipe Size | For Pipe OD | Lg. | Material | Color | Max. Pressure | Each | |
| 2 | 2 3/8" | 1 49/64" | PVC Plastic | Black | 4 psi @ 72° F | 0000000 | 000000 |