Service Metal
150# Galvanized Malleable Reducing Couplings
- SKU:
- SGR
- Availability:
- Usually Ships Same Day
- Weight:
- 0.00 LBS
Description
150# Galvanized Malleable Iron Reducing Coupling
150# Galvanized Malleable Iron Reducing Couplings are designed to connect two male-threaded pipe sections of different nominal sizes while maintaining a straight piping run.
Manufactured from durable malleable iron with a hot-dip galvanized finish, these Class 150 reducing couplings provide a compact pipe-size transition with added corrosion resistance for industrial, commercial, plumbing, mechanical, water, and outdoor piping applications.
Product Highlights
- Reducing coupling for connecting two different nominal pipe sizes
- Female NPT threaded connections on both ends
- Maintains a straight piping run while changing pipe size
- Combines pipe connection and size reduction in one fitting
- Helps eliminate the need for a separate reducer or bushing in many layouts
- Hot-dip galvanized finish for added corrosion resistance
- Durable malleable iron construction
- Class 150 fitting
- Malleable castings conform to ASTM A197
- Hot-dipped galvanized fittings conform to ASTM A153
- 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
- Galvanized fittings meet ANSI/NSF 61-4 Annex G and CA AB1953 (<0.25% lead)
- Manufactured in an ISO-certified facility
- Country of origin: Thailand & China
Technical Specifications
| Product Type | Reducing Coupling |
|---|---|
| Material | Malleable Iron |
| Finish | Hot-Dip Galvanized |
| Pressure Class | 150# |
| Connection Type | Female NPT x Female NPT |
| Configuration | Straight Reducing Coupling |
| Primary Function | Connect Different Pipe Sizes in a Straight Run |
| Casting Standard | ASTM A197 |
| Galvanizing Standard | ASTM A153 |
| Dimensional Standard | ASME B16.3 |
| Thread Standard | ASME B1.20.1 |
| Listings / Approvals | UL Listed & FM Approved at 300 PSI |
| Lead / Potable Water Compliance | ANSI/NSF 61-4 Annex G and CA AB1953 (<0.25% lead) |
| 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.
Reducing Configuration
The coupling has two different female NPT connection sizes, allowing a larger threaded pipe to transition directly to a smaller pipe within the same fitting.
Hot-Dip Galvanized Finish
The galvanized coating conforms to ASTM A153 and provides added protection against rust and corrosion in moisture-prone and outdoor environments.
Why Use a Reducing Coupling?
Direct Pipe Size Transition
A reducing coupling connects two different male-threaded pipe sizes directly, making it a simple solution for changing pipe diameter within a straight run.
Fewer Components
Because the size reduction is built into the coupling, it can reduce the need for separate couplings, bushings, or reducing fittings in many piping layouts.
Typical Applications
Commercial & Mechanical Piping
- Commercial plumbing systems
- Mechanical piping
- Water distribution
- General utility piping
- Straight pipe-size transitions
Galvanized Applications
- Outdoor piping
- Moist environments
- Water-service applications
- Industrial installations
- General galvanized piping systems
Ask Willy: Need Pipe Size Help?
Use our common pipe diameters and wall thickness chart to confirm both connection sizes before ordering galvanized malleable iron fittings. You can also review the reducing coupling specification sheet and Certificate of Conformance below.
Standards & Approvals
ASTM Standards
Malleable iron castings conform to ASTM A197, while hot-dipped galvanized fittings conform to ASTM A153.
ASME Standards
Malleable fitting dimensions conform to ASME B16.3, while NPT threads conform to ASME B1.20.1.
UL, FM & Lead Compliance
Class 150 fittings are UL Listed and FM Approved at 300 PSI. Galvanized fittings meet ANSI/NSF 61-4 Annex G and CA AB1953 requirements listed in the supplied product information.
Related Malleable Iron Standards
- Malleable bushings, plugs, and locknuts conform to ASME B16.14.
- Malleable unions conform to ASME B16.39.
- Class 300 fittings are UL Listed according to the supplied product information.
- NPT threads on applicable fittings conform to ASME B1.20.1.
Need More Galvanized Malleable Iron Fittings?
Shop our complete selection of 150# galvanized malleable iron fittings, including reducing couplings, standard couplings, elbows, tees, bushings, unions, caps, plugs, and other threaded fittings.
Frequently Asked Questions
What is a reducing coupling used for?
A reducing coupling is used to connect two male-threaded pipe sections of different nominal sizes while maintaining a straight piping run.
How is a reducing coupling different from a standard coupling?
A standard coupling typically connects two pipe ends of the same nominal size, while a reducing coupling connects two different nominal pipe sizes.
Can a reducing coupling replace a separate reducer?
In many threaded piping layouts, yes. Because the size transition is built into the coupling, it can eliminate the need for an additional reducing fitting.
What type of connections does this fitting use?
The coupling uses female NPT threaded connections in two different nominal sizes.
Does a reducing coupling change pipe direction?
No. A reducing coupling maintains a straight piping run while changing pipe size.
Why choose a galvanized reducing coupling?
The hot-dip galvanized finish provides added protection against rust and corrosion in installations exposed to moisture or outdoor conditions.
What standard applies to the galvanized coating?
The supplied product information states that hot-dipped galvanized fittings conform to ASTM A153.
What dimensional standard applies?
Malleable fitting dimensions conform to ASME B16.3.
What thread standard applies?
NPT threads conform to ASME B1.20.1.
What sizes should I verify before ordering?
Verify both the larger and smaller nominal connection sizes before ordering to ensure the fitting matches the intended pipe-size transition.
Important Ordering & Installation Notes
- Confirm both nominal connection sizes before ordering.
- Verify the larger and smaller pipe sizes match the intended piping transition.
- This fitting maintains a straight run while reducing pipe size.
- Both connections are female NPT.
- NPT threads conform to ASME B1.20.1.
- Hot-dipped galvanized fittings conform to ASTM A153 according to the supplied product information.
- Use compatible galvanized pipe, fittings, thread sealant, and accepted threaded installation practices.
- Avoid damaging the galvanized coating during handling and installation.
- Verify system pressure, service, potable-water, code, and approval requirements before installation.
- Refer to the specification sheet and Certificate of Conformance for additional product information.
