Parker 3/4 X 1/2 Gg-s Pipe Coupling Fnptf 4000 Psi

Product Description

The PARKER 3/4 X 1/2 GG-S is a straight pipe coupling designed for high-pressure fluid and gas line connections in industrial and commercial plumbing systems. It features female NPT threads on both ends in a reducing configuration, accepting a 3/4-inch thread on one side and a 1/2-inch thread on the other. Rated to 4,000 psi maximum working pressure, this coupling is built from zinc-plated steel for corrosion resistance in demanding service environments. Plumbers, pipefitters, and industrial maintenance technicians install this fitting when joining two female-threaded pipe sections of differing nominal sizes in a straight run.

This coupling suits residential and commercial piping systems where a reducing connection between 3/4-inch and 1/2-inch FNPTF threaded pipe ends is required. Typical applications include hydraulic lines, compressed air systems, water supply lines, and industrial process piping. The straight body profile keeps the installation compact within tight panel or equipment enclosures. Its zinc-plated steel construction holds up in environments with moderate moisture exposure.

Key Features

• Reducing straight coupling connects 3/4-inch to 1/2-inch FNPTF threaded pipe ends
• 4,000 psi maximum working pressure rating for high-pressure service
• Zinc-plated steel construction provides corrosion resistance
• Straight fitting shape keeps piping runs compact and in-line
• 1-3/8-inch hex size accommodates standard pipe wrenches and open-end wrenches
• FNPTF thread classification ensures pressure-tight female thread engagement

Compatibility

Designed as an OEM-style replacement or new-installation fitting for systems using 3/4-inch by 1/2-inch FNPTF threaded connections in industrial, commercial, or residential piping applications.

Installation Notes

Installation should be performed by a licensed plumber or qualified pipefitter in accordance with applicable IPC or local plumbing codes. Shut off and depressurize the system completely before removing any existing fittings or threading in the new coupling. Apply thread sealant or PTFE tape to the male threads being engaged, not to the FNPTF female threads of the fitting itself. Avoid over-tightening, which can crack or distort the fitting body.