The B&K Products 521-704HN is a rugged black iron union fitting designed to securely join two pipes while allowing for easy disassembly. This union is ideal for industrial and residential applications where durability and reliability are essential. Made from malleable black iron, it is not suitable for potable water systems but performs exceptionally well in transporting various non-potable fluids and gases.

Key Features

• Type: 3/4-inch Female Iron Pipe (FIP) Black Iron Union
• Material: Black Iron
• Class: 150-lb malleable fittings
• Seal: Relative softness of metal ensures a secure seal
• Pressure Rating: Up to 500 PSI
• Temperature Rating: Operates effectively at 150°F
• Threading: ANSI/ASME B1.20.1 compliant threaded ends
• Compliance: Meets ASTM and ASME standards

Applications

• Lubricant, oil, and grease systems
• Liquefied petroleum (LP) gas and fuel lines
• Natural gases (nitrogen, oxygen, etc.)
• Steam and diesel systems
• DIY piping and structural projects