Description

Description

Midland 4" Red Brass Coupling

Midland 4" Red Brass Couplings are precision-machined threaded fittings designed to join two sections of the same nominal pipe size in plumbing, HVAC, industrial, and general fluid handling systems.

Manufactured from premium red brass, this coupling provides excellent corrosion resistance, dependable strength, and long service life in demanding applications. Female NPT threaded connections on both ends create a straight, secure connection between compatible 4" male-threaded components.

Product Highlights

4" nominal pipe size
Straight coupling configuration
Female NPT x Female NPT threaded connections
Designed to join two equal-size threaded components
Durable red brass construction
Excellent corrosion resistance
Good resistance to dezincification
Precision-machined female NPT threads
Suitable for plumbing, HVAC, industrial, and fluid handling systems
Manufactured by Midland Industries

Technical Specifications

Product Type	Straight Threaded Coupling
Brand	Midland
Nominal Pipe Size	4"
Material	Red Brass
Connection Type	Female NPT x Female NPT
Thread Type	NPT
Configuration	Straight / Equal Size
Primary Function	Joining Two Compatible 4" Male-Threaded Piping Components
Typical Applications	Plumbing, HVAC, Industrial, Mechanical, Utility, and General Fluid Handling Systems

Coupling Configuration

4" Female NPT Connection

One end features a precision-machined 4" female NPT connection for installation with a compatible male-threaded pipe, nipple, fitting, valve, or equipment connection.

Straight Coupling Body

The straight-through body joins two equal-size threaded components while maintaining a compact inline piping connection.

4" Female NPT Connection

The opposite end also features a 4" female NPT connection for connection to another compatible 4" male-threaded component.

Construction Details

Midland 4" Red Brass Couplings are manufactured from high-quality red brass to provide dependable strength and resistance to corrosion in compatible commercial and industrial piping applications.

Precision-machined female NPT threads on both ends help provide secure engagement with compatible male-threaded components when installed using accepted piping practices.

The straight coupling design creates a direct inline connection between two 4" threaded components without changing pipe size or direction.

Why Choose a Red Brass Coupling?

Reliable Inline Connection

Joins two equal-size threaded components
Maintains a straight piping run
Compact one-piece fitting design
No welding or soldering required
Useful for new installations and repairs

Red Brass Construction

Excellent corrosion resistance
Good resistance to dezincification
Dependable mechanical strength
Suitable for compatible commercial and industrial systems
Designed for long-term threaded service

NPT Threaded Connections

4" Female NPT x Female NPT

Both ends use 4" female NPT threads for connection to compatible 4" male NPT pipe, nipples, fittings, valves, or equipment connections.

Thread Sealing

Use an appropriate thread sealant or PTFE tape on mating male NPT threads according to the system media, piping material, and installation requirements.

Typical Applications

Plumbing & HVAC

Large-diameter threaded plumbing systems
HVAC piping
Mechanical rooms
Utility piping
Equipment connections

Industrial & Fluid Handling

Industrial piping systems
Process piping
Fluid handling equipment
Maintenance and repair
Compatible general-purpose piping systems

Size Selection

This listing is specifically for a 4" Midland Red Brass Coupling.

Confirm that both mating components use compatible 4" male NPT threads before ordering and verify the pressure, temperature, media, and application requirements of the system.

Ask Willy: Need Help with This 4" Red Brass Coupling?

Our pipe and fitting specialists can help review your 4" NPT connection requirements, mating components, system media, pressure, temperature, and material compatibility before you order.

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Frequently Asked Questions

What size is this coupling?

This listing is specifically for a 4" Midland Red Brass Coupling.

What material is the coupling made from?

The fitting is manufactured from red brass.

What type of connections does it use?

It features 4" female NPT threaded connections on both ends.

What is a straight coupling used for?

A straight coupling joins two compatible male-threaded components of the same nominal pipe size in an inline configuration.

Does this coupling reduce pipe size?

No. This is a straight 4" coupling intended to connect two equal-size 4" threaded components.

Why use red brass?

Red brass provides dependable mechanical strength along with excellent corrosion and dezincification resistance in compatible piping systems.

Does the coupling change piping direction?

No. The straight coupling maintains an inline piping connection.

Should thread sealant be used?

Use an appropriate thread sealant or PTFE tape on the mating male NPT connections according to the application requirements.

What are these couplings commonly used for?

Typical applications include plumbing, HVAC, industrial piping, mechanical systems, utility piping, equipment connections, and compatible fluid handling systems.

What should I verify before ordering?

Confirm the 4" nominal pipe size, mating male NPT threads, system pressure, temperature, media compatibility, and installation requirements.

Important Ordering & Installation Notes

This listing is for a Midland 4" Red Brass Coupling.
Both ends use 4" female NPT threaded connections.
Verify both mating components use compatible 4" male NPT threads.
This is a straight coupling and does not reduce pipe size.
Use an appropriate thread sealant or PTFE tape on mating threaded connections.
Verify red brass is suitable for the intended media and operating environment.
Confirm pressure and temperature requirements before installation.
Avoid excessive tightening that could damage the coupling or mating threads.
Use appropriate wrenching surfaces during installation.
Inspect all threaded connections for damage or contamination before assembly.
Support connected piping to avoid excessive mechanical loading on the fitting.
Check completed connections for leakage before placing the system into service.
This listing is for the coupling only unless otherwise specified.
Pipe, nipples, valves, and additional fittings are sold separately unless stated otherwise.
Install according to accepted piping practices, applicable codes, and Midland manufacturer recommendations.