Service Metal
150# Black Malleable Tees
- SKU:
- SBT
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
150# Black Malleable Iron Tee
150# Black Malleable Iron Tees are designed to create a dependable three-way connection in threaded piping systems, allowing a branch line to connect at 90 degrees to the main run.
Manufactured from durable malleable iron, these Class 150 tees provide reliable strength and connection performance for industrial, commercial, plumbing, mechanical, water, gas, oil, and fire protection piping systems.
Product Highlights
- Three-way threaded tee fitting
- Creates a 90° branch connection
- Female NPT threaded openings
- Designed for equal-size branch and run connections
- Durable black malleable iron construction
- Class 150 fitting
- Malleable castings conform to ASTM A197
- Malleable fitting dimensions conform to ASME B16.3
- NPT threads conform to ASME B1.20.1
- Class 150 fittings are UL Listed and FM Approved at 300 PSI
- Manufactured in an ISO-certified facility
- Country of origin: Thailand & China
Technical Specifications
| Product Type | Tee |
|---|---|
| Material | Malleable Iron |
| Finish | Black |
| Pressure Class | 150# |
| Connection Type | Female NPT Threaded |
| Configuration | Three-Way Equal Tee |
| Branch Angle | 90° |
| Primary Function | Branch / Flow Distribution Connection |
| Casting Standard | ASTM A197 |
| Dimensional Standard | ASME B16.3 |
| Thread Standard | ASME B1.20.1 |
| Listings / Approvals | UL Listed & FM Approved at 300 PSI |
| Manufacturing | ISO-Certified Facility |
| Country of Origin | Thailand & China |
Construction & Applications
Malleable Iron Construction
Manufactured from malleable iron castings conforming to ASTM A197 for dependable strength and durability in threaded piping installations.
Three-Way Configuration
The tee provides three threaded openings, allowing a branch line to connect to the main piping run at a 90-degree angle.
Standard NPT Threads
Female NPT threaded connections conform to ASME B1.20.1 for compatibility with properly sized male-threaded pipe and fittings.
Typical Applications
Industrial & Mechanical Piping
- Industrial piping systems
- Commercial piping
- Mechanical piping
- Threaded branch connections
- General utility piping
Common Services
- Water piping
- Gas piping
- Oil piping
- Fire protection systems
- General process piping
Equal Branch Connection
This standard tee is intended for applications where the run and branch connections use the same nominal pipe size. For systems requiring a smaller branch or different connection size, use a compatible reducing tee.

Ask Willy: Need Pipe Size Help?
Use our common pipe diameters and wall thickness chart to confirm sizing before ordering malleable iron fittings. You can also review the tee specification sheet and Certificate of Conformance below.
Standards & Approvals
ASTM A197
Malleable iron castings conform to ASTM A197.
ASME Standards
Malleable fitting dimensions conform to ASME B16.3, while NPT threads conform to ASME B1.20.1.
UL & FM
Class 150 fittings are UL Listed and FM Approved at 300 PSI.
Need More Black Malleable Iron Fittings?
Shop our complete selection of 150# black malleable iron fittings, including tees, reducing tees, elbows, couplings, bushings, caps, plugs, and other threaded fittings for industrial and commercial piping systems.
Frequently Asked Questions
What is a malleable iron tee used for?
A tee is used to create a three-way connection in a threaded piping system, allowing a branch line to connect at 90 degrees to the main run.
How many connections does this tee have?
This fitting has three female NPT threaded openings.
Are all three openings the same size?
This standard tee is intended for equal-size connections. If different run or branch sizes are required, select a reducing tee instead.
How is a tee different from a cross?
A tee has three openings and provides one branch connection, while a cross has four openings for a four-way piping connection.
What material is this fitting made from?
The tee is manufactured from malleable iron castings conforming to ASTM A197.
What dimensional standard applies?
Malleable fitting dimensions conform to ASME B16.3.
What thread standard applies?
NPT threads conform to ASME B1.20.1.
Is this a Class 150 fitting?
Yes. This is a 150# black malleable iron tee.
Is this fitting UL Listed and FM Approved?
Yes. The supplied product information states that Class 150 fittings are UL Listed and FM Approved at 300 PSI.
Where are these fittings manufactured?
The listed countries of origin are Thailand and China, and the manufacturing facility is ISO certified.
Important Ordering & Installation Notes
- Confirm the nominal pipe size before ordering.
- This standard tee is intended for equal-size run and branch connections.
- Use a reducing tee if one or more connection sizes must differ.
- The fitting uses female NPT threaded connections.
- NPT threads conform to ASME B1.20.1.
- Use compatible pipe, fittings, thread sealant, and accepted threaded installation practices.
- Verify system pressure, service, code, and approval requirements before installation.
- Refer to the specification sheet and Certificate of Conformance for additional product information.