Charman Inc.
150# Black Malleable Iron Reducing Coupling
- Availability:
- Usually in Stock – Ships Quickly
- Weight:
- 0.00 LBS
Description
150# Black Malleable Iron Reducing Coupling
150# black malleable iron reducing couplings connect two male-threaded pipes, pipe nipples, or compatible fittings of different nominal sizes in a straight line. Female NPT threads on both ends provide a compact transition from a larger pipe size to a smaller pipe size while maintaining the same piping direction.
Select the required reducing size from the product options above. Sizes are listed with the larger female connection first and the smaller female connection second. The selected variation determines the Charman item number, online selling price, weight, cost, and other size-specific product information.
Product Highlights
- 150# Class black malleable iron construction
- Female NPT x reduced female NPT connections
- Connects two different male-threaded pipe sizes in a straight line
- Compact reducing design
- Durable black finish
- Compatible with standard threaded black steel pipe and pipe nipples
- Available in reducing combinations from 1/4" x 1/8" through 6" x 5"
- Suitable for commercial, industrial, maintenance, and repair applications
Technical Specifications
| Material | Black Malleable Iron |
|---|---|
| Pressure Class | 150# / Class 150 |
| Connection | Female NPT x Female NPT |
| Function | Straight-Line Pipe Size Reduction |
| Thread Standard | ASME B1.20.1 |
| Finish | Black |
| Fitting Type | Threaded Reducing Coupling |
| Manufacturer | Charman Manufacturing |
| Available Sizes | 1/4" x 1/8" through 6" x 5" |
How a Reducing Coupling Works
The larger female NPT opening accepts the larger male-threaded pipe, nipple, or fitting, while the smaller female NPT opening accepts the reduced-size male-threaded component. Both connections remain aligned on the same centerline, allowing the piping system to transition between sizes without changing direction.
Common Applications
Plumbing and Mechanical Systems
- Reducing straight pipe runs
- Connecting different pipe nipple sizes
- Mechanical-room piping
- Black steel pipe installations
- Equipment and appliance connections
- General repair and maintenance
Industrial and Utility Service
- Industrial process piping
- Compressed-air systems
- Natural-gas piping
- Water and utility piping
- Oil and petroleum piping
- Approved low-pressure steam service
Product Resources
Review the Charman product catalog, Class 150 specifications, and manufacturer warranty information before installation.
Need Help Selecting a Black Malleable Iron Reducing Coupling?
Our industrial PVF specialists can help confirm the larger and smaller pipe sizes, pressure class, thread type, material compatibility, application requirements, and product availability.
Frequently Asked Questions
What is a black malleable iron reducing coupling used for?
A reducing coupling connects two male-threaded pipes, nipples, or fittings of different nominal sizes in a straight line.
Which size is listed first?
The larger female NPT connection is listed first, followed by the smaller female NPT connection. For example, a 1" x 1/2" reducing coupling accepts a 1" male thread on one end and a 1/2" male thread on the other.
How is a reducing coupling different from a hex bushing?
A reducing coupling has female NPT threads on both ends and connects two male-threaded components. A hex bushing has a larger male NPT thread and a smaller female NPT opening.
Does a reducing coupling change pipe direction?
No. Both threaded openings are aligned on the same centerline, so the fitting reduces pipe size while maintaining a straight run.
What pressure class is this fitting?
This black malleable iron reducing coupling is manufactured as a 150# or Class 150 threaded fitting.
Can it be used with black steel pipe nipples?
Yes. It is designed to connect compatible male NPT-threaded black steel pipe, pipe nipples, and other approved threaded components.
Can it be used for gas, water, oil, air, or steam?
It may be used in compatible gas, water, oil, compressed-air, steam, and general-service systems when the application remains within applicable pressure, temperature, media, code, and manufacturer requirements.
Should thread sealant be used?
Use an approved pipe-thread sealant or thread tape on both male-threaded connections, selected for the piping media, pressure, temperature, applicable codes, and manufacturer recommendations.
How do I choose the correct size?
Match the first size to the larger male-threaded component and the second size to the smaller male-threaded component being connected.
Important Ordering Notes
- Select the required reducing combination before adding the product to your cart.
- The first size is the larger female NPT connection; the second size is the smaller female NPT connection.
- The selected variation determines the Charman item number, price, weight, and cost.
- Confirm both nominal pipe sizes and thread types before ordering.
- Use an approved thread sealant suitable for the piping media and operating conditions.
- Confirm pressure, temperature, media compatibility, and application requirements before installation.
- Support connected piping properly to avoid excessive stress on the fitting.
- Installation should be completed by qualified personnel and comply with applicable codes and standards.
- Manufacturer warranty coverage is subject to the terms, limitations, and exclusions in the linked warranty document.
