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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Standard-Wall Butt-Weld Stainless Steel Unthreaded Pipe Fittings
Also known as Schedule 40 fittings, these have thicker walls than our thin-wall stainless steel unthreaded butt-weld fittings. They have beveled ends that, when flush to pipe, create a trough for a strong weld that permits maximum flow.
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
- For Use With: Air, Natural Gas, Oil, Water
- Specifications Met: ASME B16.9, ASTM A403, MSS SP-43
- Pipe Nipples and Pipe: Use Schedule 40 stainless steel
- Flanges: Use Class 150 stainless steel
Thin-Wall Butt-Weld Stainless Steel Unthreaded Pipe Fittings
Also known as Schedule 10 fittings, these are thin and lightweight. They have beveled ends that, when flush to pipe, create a trough for a strong weld that permits maximum flow.
304 stainless steel fittings have very good corrosion resistance. 316 stainless steel fittings have excellent corrosion resistance.
Inline tees are also known as branch tees.
Low-Pressure Iron and Steel Threaded Pipe Fittings
Use these fittings for low-pressure applications in noncorrosive environments.
Connectors with NPT threads are threaded on both ends.
Saddle tap tees tap into existing pipe lines so you can install branch lines, valves, and other equipment. The gasket and clamps create a tight seal so the opening won’t leak. To install, shut down your line and secure the clamps, then drill a hole into the pipe.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Specifications Met:
NPT: ASME B1.20.1, ASME B16.3, UL Listed
BSPT: DIN EN 10226 - Pipe Nipples and Pipe: Use Schedule 40 steel
| Pipe Size  | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Female | |||||
|---|---|---|---|---|---|
| 6 | 150 psi @ 72° F | 150 psi @ 350° F | Iron | 000000000 | 000000000 |
- For Use With: Air, Water
- Temperature Range: -20° to 180° F
| Pipe Size (A) | For Pipe Size | For Pipe OD | Lg. | Max. Pressure | Max. Vacuum | Color | Material | Gasket Material | Each | ||
NPT Female | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 6 | 6 5/8" | 3 5/8" | 100 psi @ 72° F | 15 in. of Hg @ 72° F | Blue | Epoxy-Coated | Iron | Buna-N Rubber | 00000000 | 0000000 |
| 3/4 | 6 | 6 5/8" | 3 5/8" | 100 psi @ 72° F | 15 in. of Hg @ 72° F | Blue | Epoxy-Coated | Iron | Buna-N Rubber | 00000000 | 000000 |
| 1 | 6 | 6 5/8" | 3 5/8" | 100 psi @ 72° F | 15 in. of Hg @ 72° F | Blue | Epoxy-Coated | Iron | Buna-N Rubber | 00000000 | 000000 |
| 1 1/4 | 6 | 6 5/8" | 3 5/8" | 100 psi @ 72° F | 15 in. of Hg @ 72° F | Blue | Epoxy-Coated | Iron | Buna-N Rubber | 00000000 | 000000 |
| 1 1/2 | 6 | 6 5/8" | 3 5/8" | 100 psi @ 72° F | 15 in. of Hg @ 72° F | Blue | Epoxy-Coated | Iron | Buna-N Rubber | 00000000 | 000000 |
| 2 | 6 | 6 5/8" | 3 5/8" | 100 psi @ 72° F | 15 in. of Hg @ 72° F | Blue | Epoxy-Coated | Iron | Buna-N Rubber | 00000000 | 000000 |
Low-Pressure Galvanized Iron and Steel Threaded Pipe Fittings
The galvanized finish on these fittings provides fair corrosion resistance. Fittings are for use in low-pressure applications.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Pressure Class: 150
- Specifications Met:
NPT: ASME B1.20.1, ASME B16.3, ASTM A197, UL Listed
BSPT: ASTM A197, DIN EN 10226 - Pipe Nipples and Pipe: Use Schedule 40 galvanized steel
- Flanges: Use Class 150 galvanized steel
| Pipe Size | Max. Pressure | Max. Steam Pressure | Material | Each | |
NPT Female | |||||
|---|---|---|---|---|---|
| 6 | 150 psi @ 72° F | 150 psi @ 350° F | Galvanized Iron | 00000000 | 000000000 |
Standard-Wall Butt-Weld Steel Unthreaded Pipe Fittings
Butt-weld fittings allow for a smooth connection that provides maximum flow. They have beveled ends that, when flush to pipe, create a trough for a strong, permanent weld. Fittings are also known as Schedule 40. They are for use in noncorrosive environments.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Specifications Met: ASTM A234, ASME B16.9
- Pipe Nipples and Pipe: Use Schedule 40 steel
- Flanges: Use Class 150 steel
| Pipe Size | Wall Thick. | Construction | Each | |
| 6 | 0.28" | Seamless | 000000000 | 0000000 |
Thick-Wall Butt-Weld Steel Unthreaded Pipe Fittings
With thicker, stronger walls than our standard-wall butt-weld pipe fittings, these fittings stand up to your high strength applications. Weld them flush against pipe for a smooth connection that permits maximum flow. These fittings have beveled ends that create a trough for a leak-resistant, permanent weld. Made of steel, they’re for use in noncorrosive environments.
- For Use With: Air, Steam, Oil, Water, Natural Gas
- Specifications Met: ASTM A234
- Pipe Nipples and Pipe: Use Schedule 80 steel
- Flanges: Use Class 300 steel
| Pipe Size | Wall Thick. | Construction | Each | |
| 6 | 0.432" | Seamless | 0000000 | 0000000 |
Grooved-End Iron Pipe Fittings
The grooved ends on these fittings connect to pipe with a clamp to easily install piping systems. Since there’s no heat or threading required, they provide quick access to a pipe line for routine maintenance. Fittings are also known as Victaulic fittings. They are for use in noncorrosive applications.
- For Use With: Air, Water
- Temperature Range: -30° to 250° F
- Specifications Met: UL Listed, FM Approved, ASTM A536
| Pipe Size | Max. Pressure | Color | Material | Each | |
| 6 | 750 psi @ 72° F | Orange | Enamel-Coated Ductile Iron | 00000000 | 0000000 |
Thick-Wall Plastic Pipe Fittings for Water
Connect these fittings to Schedule 80 pipe. With thicker, stronger walls than standard-wall fittings, they can handle heavy duty supply applications, such as water processing, wastewater treatment, and irrigation. Fittings are plastic for good corrosion resistance. They meet ASTM specifications and testing requirements for material quality.
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. For plastic threads, apply a non-hardening, plastic-compatible sealant sealant. Tape or sealants with PTFE are not recommended for plastic-to-plastic connections. 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 Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: ASTM D1784, NSF/ANSI 61
- Pipe Nipples and Pipe: Use Schedule 80 PVC Plastic
- Flanges: Use Class 150 PVC Plastic
| Pipe Size | Socket Depth | Material | Color | Each | |
| 6 | 3" | PVC Plastic | Dark Gray | 00000000 | 000000 |
- For Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: ASTM D1784, NSF/ANSI 61
- Pipe Nipples and Pipe: Use Schedule 80 PVC Plastic
- Flanges: Use Class 150 PVC Plastic
| Pipe Size | Material | Color | Each | |
NPT Threads | ||||
|---|---|---|---|---|
| 6 | PVC Plastic | Dark Gray | 00000000 | 0000000 |
- For Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: ASTM D1784, NSF/ANSI 61
- Pipe Nipples and Pipe: Use Schedule 80 PVC Plastic
- Flanges: Use Class 150 PVC Plastic
Inline tees are also known as branch tees.
- For Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: ASTM D1784, NSF/ANSI 61
- Pipe Nipples and Pipe: Use Schedule 80 PVC Plastic
- Flanges: Use Class 150 PVC Plastic
Inline tees are also known as branch tees.
- For Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: ASTM D1784, NSF/ANSI 372, NSF/ANSI 61
- Pipe Nipples and Pipe: Use Schedule 80 PVC Plastic
- Flanges: Use Schedule 80 PVC Plastic
Saddle-tap tees allow you to create additional outlets and connections in metal or plastic pipe. To install, shut down your line and drill a hole in the pipe where you want to create a connection. Position the saddle over the hole so the gasket and lip are fully engaged and secure with the included nuts, bolts, and washers.
- For Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: ASTM D1784, NSF/ANSI 61
- Pipe Nipples and Pipe: Use Schedule 80 Aluminum, Iron, PVC Plastic, Stainless Steel, Steel
- Flanges: Use Class 150 PVC Plastic
Fittings with stainless steel collar have a reinforcement on the female threads to prevent the threads from cracking.
Saddle-tap tees allow you to create additional outlets and connections in metal or plastic pipe. To install, shut down your line and drill a hole in the pipe where you want to create a connection. Position the saddle over the hole so the gasket and lip are fully engaged and secure with the included nuts, bolts, and washers.
| Pipe Size | For Pipe Size | For Pipe OD | For Hole Dia. | Material | Collar Material | Color | Max. Pressure | Each | |
NPT Threads | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 6 | 6 5/8" | 1 1/8" | PVC Plastic | Stainless Steel | Dark Gray | 315 psi @ 72° F | 0000000 | 0000000 |
| 2 | 6 | 6 5/8" | 2 1/4" | PVC Plastic | Stainless Steel | Dark Gray | 200 psi @ 72° F | 0000000 | 000000 |
| 3 | 6 | 6 5/8" | 3" | PVC Plastic | Stainless Steel | Dark Gray | 185 psi @ 72° F | 0000000 | 000000 |
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 Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: ASTM D1784, NSF/ANSI 61
- Pipe Nipples and Pipe: Use Schedule 40 PVC Plastic
- Flanges: Use Class 150 PVC Plastic
| Pipe Size | Socket Depth | Material | Color | Each | |
| 6 | 3 17/32" | PVC Plastic | White | 00000000 | 000000 |
- For Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: ASTM D1784, NSF/ANSI 61
- Pipe Nipples and Pipe: Use Schedule 40 PVC Plastic
- Flanges: Use Class 150 PVC Plastic
Inline tees are also known as branch tees.
- For Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: See table
- Pipe Nipples and Pipe: Use Schedule 40 PVC Plastic
- Flanges: Use Class 150 PVC Plastic
Inline tees are also known as branch tees.
- For Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: See table
- Pipe Nipples and Pipe:
Pipe Size 1/2 to 1: Use PVC Plastic
Pipe Size 1 1/2 to 3: Use Aluminum, Iron, PVC Plastic, Stainless Steel, Steel - Flanges: Use Class 150 PVC Plastic
Saddle-tap tee adapters allow you to create additional outlets and connections in metal or plastic pipe. To install, shut down your line and drill a hole in the pipe where you want to create a connection. Position the saddle over the hole so the gasket and lip are fully engaged and secure with the included nuts, bolts, and washers.
| Pipe Size | For Pipe Size | Socket Depth | For Pipe OD | For Hole Dia. | OD | ID | Wall Thick. | Material | Color | Max. Pressure | Specifications Met | Each | |
| 1 | 6 | 5/8" | 6 5/8" | 1 1/8" | 1 5/16" | 1.049" | 0.133" | PVC Plastic | White | 225 psi @ 72° F | ASTM D1784, NSF/ANSI 372, NSF/ANSI 61 | 0000000 | 0000000 |
| 2 | 6 | 11/16" | 6 5/8" | 2 1/4" | 2 3/8" | 2.067" | 0.154" | PVC Plastic | White | 200 psi @ 72° F | ASTM D1784, NSF/ANSI 61 | 0000000 | 000000 |
- For Use With: Drinking Water, Water
- Maximum Temperature: 140° F
- Specifications Met: ASTM D1784, NSF/ANSI 372, NSF/ANSI 61
- Pipe Nipples and Pipe: Use Schedule 40 Aluminum, Iron, PVC Plastic, Stainless Steel, Steel
- Flanges: Use Class 150 PVC Plastic
Fittings with stainless steel collar have a reinforcement on the female threads to prevent the threads from cracking.
Saddle-tap tee adapters allow you to create additional outlets and connections in metal or plastic pipe. To install, shut down your line and drill a hole in the pipe where you want to create a connection. Position the saddle over the hole so the gasket and lip are fully engaged and secure with the included nuts, bolts, and washers.
| Pipe Size | For Pipe Size | Socket Depth | For Pipe OD | For Hole Dia. | OD | ID | Wall Thick. | Material | Collar Material | Color | Max. Pressure | Each | |
NPT Threads | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 6 | 7/8" | 1 5/8" | 1 1/8" | 1 5/16" | 1.049" | 0.133" | PVC Plastic | Stainless Steel | White | 225 psi @ 72° F | 0000000 | 0000000 |
| 2 | 6 | 11/16" | 6 5/8" | 2 1/4" | 2 3/8" | 2.067" | 0.154" | PVC Plastic | Stainless Steel | White | 200 psi @ 72° F | 0000000 | 000000 |
CPVC Pipe Fittings for Hot Water
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.
- 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).
| Pipe Size | Socket Depth | Material | Schedule | Color | Max. Pressure | Each | |
| 6 | 3" | CPVC Plastic | 80 | Light Gray | Not Rated | 00000000 | 0000000 |
- For Use With: See table
- 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).
Inline tees are also known as branch tees.
(A) | (B) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size | Socket Depth | Pipe Size | Socket Depth | For Use With | Material | Schedule | Color | Max. Pressure | Each | |
| 6 | 3" | 4 | 2 9/32" | Acetic Acid (10%), Calcium Chloride, Deionized Water, Drinking Water, Hydrochloric Acid (25%), Nitric Acid (10%), Phosphoric Acid (85%), Salt Water, Sulfuric Acid (75%), Water | CPVC Plastic | 80 | Light Gray | Not Rated | 00000000 | 0000000 |
| 8 | 4" | 6 | 3" | Acetic Acid (10%), Calcium Chloride, Deionized Water, Drinking Water, Hydrochloric Acid (25%), Nitric Acid (10%), Phosphoric Acid (85%), Salt Water, Sulfuric Acid (75%), Water | CPVC Plastic | 80 | Light Gray | Not Rated | 00000000 | 000000 |
| Pipe Cement for Max. Pipe Size 6 | 00000000 | Each | 000000 |
- 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
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.
Saddle-tap tees allow you to create additional outlets and connections in metal or plastic pipe. They clamp on for an easy way to install and maintain systems.
| Pipe Size | For Pipe Size | For Pipe OD | For Hole Dia. | Material | Schedule | Color | Max. Pressure | Washer Material | Each | |
NPT Threads | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 6 | 6 5/8" | 2 1/4" | CPVC Plastic | 80 | Light Gray | 200 psi @ 72° F | Zinc | 00000000 | 0000000 |
Low-Pressure Clamp-On Connectors for Drain, Waste, and Vent
To make installing and maintaining systems easy, these connectors come with clamps that form a strong seal on pipe and fittings once tightened.
Saddle-tap adapters allow you to tap into an existing pipeline. They have wraparound clamps that provide nearly 360° contact with pipe; as the clamps are tightened, pressure is uniformly distributed around the pipe for maximum support. To install, shut down your line and drill a hole in the pipe where you want to create a connection. Position the saddle over the hole and tighten the clamps.
- For Use With: Air, Water
- Temperature Range: 0° to 110° F
- For Pipe Material: PVC Plastic
For Pipe Size | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| (A) | (B) | For Hole Dia. | Lg. | Material | Clamp Material | Torque, in.-lbs. | Flexibility | Each | |
| 6 | 6 to 12 | 5 1/2" | 10 1/2" | PVC Plastic | 300 Series Stainless Steel | 60 | Flexible | 00000000 | 0000000 |
Expansion Plugs for Cleanout Tees
Seal cleanout tees when testing your drain, waste, and vent systems for pressure and leaks—no need to inflate these plugs with an air compressor or hand pump. To install, insert the plug end into your pipe so the curved foot is on the bottom threads of the cleanout tee, then push down the handle to lock it into the foot. The foot has a two-stage release latch: lift the handle one notch to release the plug and allow liquid to drain slowly, then lift the handle again until the foot fully disengages to take out the plug.
For Pipe | Max. Back Pressure | Material | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Size | ID | Air, psi | Water, ft. of head | O'all Ht. | Temp. Range, °F | Seal | Handle | For Use With | Each | |
| 6 | 6.065" | 35 | 80 | 18" | 32° to 120° | Natural Rubber | Steel | ABS Pipe, Cast Iron Pipe, PVC Pipe | 00000000 | 0000000 |