521-223HC Black Merchant Coupling 1/2 Inch

Product Description

The B K/MUELLER INDS(IMPORT) 521-223HC is a 1/2 inch black merchant coupling used to join two sections of black iron pipe in gas, air, and water distribution systems. Sold in a package of 100 units, it is suited for commercial and residential rough-in work where threaded black iron connections are required. Licensed plumbers, pipefitters, and gas technicians install this type of fitting during new construction and retrofit projects. The total package weight is 16.84 pounds for the 100-count unit.

Black merchant couplings in the 1/2 inch size are standard components in gas supply lines, compressed air systems, and industrial fluid distribution. They are commonly installed at threaded pipe joints where two pipe ends need to be connected in a straight run. This fitting is appropriate for both residential and light commercial applications where black iron pipe is the specified material.

Key Features

• 1/2 inch nominal pipe size for standard threaded black iron connections
• Black iron construction suited for gas, air, and compatible fluid service
• Sold in a 100-count package for volume installation work
• Merchant coupling style for straight inline pipe joining
• Threaded ends accept standard NPT fittings

Compatibility

Designed as an OEM-style replacement and standard-fit coupling for 1/2 inch threaded black iron pipe systems in residential and commercial installations.

Installation Notes

Installation is performed by licensed plumbers, pipefitters, or gas technicians depending on the service application. Shut off all gas or fluid supply and depressurize the line before beginning work. Apply appropriate thread sealant or PTFE tape rated for the intended service before making threaded connections. All gas piping installations must comply with local codes and the International Fuel Gas Code (IFGC) where applicable.