3 inch x 2 inch Black Iron Reducing Coupling Female x Female

$24.49
- +
In stock
5 Available At My Branch
32 Available At All US Supply Locations
Brand
Brand May Vary
Part Number
521-308
SKU
7751

3" x 2" Black Malleable Iron Reducing Coupling – Dependable Transitions for Pipe Size Adaptation

Engineered for strength and performance, the 3" x 2" Black Malleable Iron Reducing Coupling is a critical component in systems requiring a secure and consistent reduction between differing nominal pipe sizes. Commonly used in gas and water applications, this fitting is designed to deliver pressure-rated connections in accordance with industry expectations.

Performance Features

  • Pressure Rated – Manufactured to handle low- and medium-pressure systems with threaded piping, including steam, air, oil, and gas lines.
  • ASTM A-197 Compliance – Constructed from malleable iron castings that meet ASTM A-197 standards for ductility and reliability.
  • Threaded Ends – Female National Pipe Thread (NPT) on both ends for easy connection to compatible schedule 40 or schedule 80 steel piping.
  • Black Finish – Uncoated surface intended for use in systems where corrosion resistance coatings are not required.
  • Code-Conforming – Suitable for compliant installations in plumbing, mechanical, and HVAC applications as specified by governing codes.

Product Specifications

  • Material: Black Malleable Iron
  • Size: 3" x 2" nominal pipe size
  • Connection: NPT Female x NPT Female
  • Standards: ASTM A-197, ANSI B16.3 (dimensions), ANSI B1.20.1 (threads)
  • Pressure Rating: 150 PSI maximum for steam; up to 300 PSI for non-steam fluids

Installation Considerations

This reducing coupling should be installed by qualified personnel following applicable mechanical code requirements. Use of thread sealant or PTFE tape is recommended to ensure a leak-free seal. Ensure alignment and proper torque during installation to prevent stress on connected components.

Applications

  • Natural gas distribution lines
  • Hydronic and low-pressure steam systems
  • Air compressors and pneumatic setups
  • Water supply or return lines in non-potable systems

Additional Notes

Black malleable iron fittings are not rated for underground or potable water systems unless otherwise specified and approved. For environments requiring corrosion resistance or exposure to moisture, galvanized or coated alternatives should be considered.

Specify the 3" x 2" Black Iron Reducing Coupling for systems demanding long service life and strong mechanical integrity. This coupling is manufactured to exacting tolerances and offers dependable performance in critical system transitions.

Specifications

Specifications
Weight 3.050000
Brand Brand May Vary
Height 3.75
Length 4.2
Width 4.15
End Style Female x Female
Finish Black
Side A 3"
Side B 2"
Fitting Type Reducing Coupling
Item Type Coupling
MPN 521-308
Material Black Iron
Product Family Fittings
Item Returns This item can be returned
Features