Holyoke Fittings 103-12 Female Pipe Coupling 3/4 Inch Brass

Product Description

The HOLYOKE FITTINGS 103-12 is a 3/4-inch female pipe coupling manufactured from yellow brass. This fitting connects two sections of pipe with matching female pipe thread (FPT) on both ends, creating a secure, leak-resistant joint in pressurized piping systems. Yellow brass construction provides corrosion resistance suitable for water, gas, and general plumbing service lines. Plumbers and pipefitters install this coupling during new construction, renovation work, and repair of residential and light commercial piping systems.

This coupling is used in residential and light commercial plumbing, HVAC hydronic systems, and gas distribution piping where a 3/4-inch female-to-female threaded connection is required. It is suited for applications involving potable water supply lines, hot and cold distribution, and low-pressure gas lines where brass fittings are specified. The compact coupling profile allows installation in tight spaces typical of mechanical rooms and wall cavities.

Key Features

• Yellow brass construction for corrosion resistance in water and gas service
• 3/4-inch female pipe thread (FPT) on both ends for standard NPT connections
• Full-port coupling design maintains flow capacity through the joint
• Compatible with standard NPT pipe thread systems requiring no special tooling

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 3/4-inch NPT threaded piping systems in residential and light commercial plumbing and HVAC applications.

Installation Notes

Installation is performed by a licensed plumber or pipefitter following applicable IPC and IFGC code requirements for the service type. Shut off and depressurize the supply line completely before removing any existing fitting or making new connections. Apply thread sealant tape or pipe dope rated for the intended service medium to all male threads before assembly. Tighten to hand-tight plus the appropriate number of turns with a pipe wrench; do not over-torque brass fittings as the material is susceptible to thread damage.

Technical Specifications

• Thread Size: 3/4 inch
• Thread Type: Female Pipe Thread (FPT / NPT)
• Material: Yellow Brass
• Fitting Type: Female Pipe Coupling
• Unit of Measure: Each

Standard Information

• Brand: HOLYOKE FITTINGS
• Manufacturer Part Number: 103-12