Service Metal
150# Black Malleable Reducing Couplings
- SKU:
- SBR
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
150# Black Malleable Iron Reducing Coupling
150# Black Malleable Iron Reducing Couplings are designed to connect two different male-threaded pipe sizes in a straight run while maintaining a secure threaded connection.
Manufactured from durable malleable iron, these Class 150 reducing couplings provide a compact and dependable pipe-size transition for industrial, commercial, plumbing, mechanical, water, gas, oil, and fire protection piping systems.
Product Highlights
- Reducing coupling configuration
- Female NPT x female NPT connections
- Connects two different nominal pipe sizes
- Maintains a straight in-line piping transition
- 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 | Reducing Coupling |
|---|---|
| Material | Malleable Iron |
| Finish | Black |
| Pressure Class | 150# |
| Connection Type | Female NPT x Female NPT |
| Configuration | Straight Reducing Coupling |
| Primary Function | Connect Different Male-Threaded Pipe Sizes |
| 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.
In-Line Size Reduction
Two different female NPT connection sizes allow the fitting to transition between different nominal pipe diameters without changing the direction of the piping run.
Threaded Installation
Female NPT connections accept compatible male-threaded pipe and provide a compact alternative to using a separate coupling and reducing bushing.
Why Use a Reducing Coupling?
Compact Pipe Size Transition
A reducing coupling changes nominal pipe size within a straight piping run while keeping the connection compact and straightforward.
Female-to-Female Connection
Both ends are internally threaded, allowing two male-threaded pipes of different nominal sizes to connect directly through the fitting.
Typical Applications
Industrial & Mechanical Piping
- Industrial piping systems
- Commercial plumbing
- Mechanical piping
- General utility piping
- Pipe-size transition points
Common Service Applications
- Water piping
- Gas piping
- Oil piping
- Fire protection systems
- General threaded piping
Ask Willy: Need Pipe Size Help?
Use our common pipe diameters and wall thickness chart to confirm both connection sizes before ordering black malleable iron reducing couplings. You can also review the 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 Approval
The supplied product information states that Class 150 fittings are UL Listed and FM Approved at 300 PSI.
Related Malleable Iron Standards
- Malleable bushings, plugs, and locknuts conform to ASME B16.14.
- NPT threads on applicable fittings conform to ASME B1.20.1.
- Malleable fitting dimensions conform to ASME B16.3.
Need More Black Malleable Iron Fittings?
Shop our complete selection of 150# black malleable iron fittings, including reducing couplings, standard couplings, tees, elbows, bushings, unions, plugs, and more.
Frequently Asked Questions
What is a black malleable iron reducing coupling used for?
It is used to connect two compatible male-threaded pipes of different nominal sizes while maintaining a straight piping run.
What type of connections does this fitting use?
The reducing coupling uses female NPT threaded connections on both ends.
How is a reducing coupling different from a standard coupling?
A standard coupling connects two pipes of the same nominal size. A reducing coupling has different connection sizes so it can transition between two pipe diameters.
How is a reducing coupling different from a hex bushing?
A reducing coupling has female threads on both ends. A conventional hex bushing typically has male threads on the outside and female threads on the inside.
Does a reducing coupling change pipe direction?
No. It maintains a straight piping run while transitioning between different nominal pipe sizes.
What material standard applies?
The supplied product information states that the malleable iron castings conform 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 fitting UL Listed and FM Approved?
The supplied product information states that Class 150 fittings are UL Listed and FM Approved at 300 PSI.
What should I verify before ordering?
Confirm both nominal connection sizes, thread type, system service, and required fitting class before ordering.
Important Ordering & Installation Notes
- Confirm both nominal connection sizes before ordering.
- Both ends use female NPT threads.
- This fitting changes pipe size without changing pipe direction.
- Do not confuse a reducing coupling with an equal-size coupling or a male x female hex bushing.
- NPT threads conform to ASME B1.20.1.
- Malleable fitting dimensions conform to ASME B16.3.
- Use compatible threaded pipe, fittings, and thread sealant appropriate for the intended system.
- Verify pressure, temperature, media compatibility, applicable codes, and approval requirements before installation.
- Refer to the specification sheet and Certificate of Conformance for additional product information.
