3/4 inch Galvanized Iron Coupling Female x Female

3/4" Galvanized Malleable Iron Coupling – Built for Structural Integrity and Corrosion Resistance

The 3/4" Galvanized Malleable Iron Coupling is engineered to connect two male-threaded pipe ends in pressure and non-pressure plumbing systems. Constructed from ASTM A197 malleable iron and hot-dip galvanized per ASTM A153, this fitting delivers strength, corrosion resistance, and code compliance in a range of piping applications.

Key Performance Features

• Material Composition: Malleable iron body provides strength and ductility, ideal for dynamic systems or installations subject to vibration or thermal cycling.
• Protective Galvanized Finish: Zinc coating ensures long-term corrosion resistance in wet, humid, or outdoor environments, extending service life in demanding installations.
• Thread Standards: Tapered NPT threads (per ANSI B1.20.1) offer a pressure-tight seal when paired with appropriate thread sealant or PTFE tape.
• Heavy Pattern Design: Suitable for moderate to high-pressure plumbing, air, water, or steam systems when properly installed and supported.
• Temperature Range: Rated for use in systems up to 300 PSI at ambient temperatures, or as governed by system and code parameters.

Specifications

• Size: 3/4 inch nominal pipe size
• Ends: Female NPT x Female NPT
• Material: ASTM A197 malleable iron
• Finish: Hot-dip galvanized (ASTM A153)
• Standards: ANSI/ASME B16.3, UL/FM listed (select models), and NSF/ANSI 61/372 lead-free certified if specified for potable applications

Installation Considerations

Apply appropriate thread sealant to male threads prior to assembly. Tighten with a pipe wrench to ensure full thread engagement. Avoid over-torquing to prevent cracking. Use in accordance with local plumbing and mechanical codes. Galvanized fittings are not recommended for acidic systems or those carrying highly corrosive media.

Typical Applications

This 3/4" galvanized malleable coupling is widely used in domestic and commercial plumbing, fire sprinkler systems, air compressor piping, irrigation networks, and general industrial piping where corrosion resistance and mechanical strength are critical.

Did You Know?

Malleable iron’s ability to flex slightly under stress without cracking makes it ideal for systems subject to movement, thermal expansion, or minor settlement. Galvanizing adds protection from rust, making this coupling suitable for exterior or exposed applications.

The 3/4" Galvanized Malleable Iron Coupling provides proven performance in metal pipe systems where durability, sealing integrity, and code compliance are essential. Trusted by professionals for structural reliability in every joint.