Watts 0959086 Push-to-connect Female Union 1/2x3/4

Product Description

The WATTS 0959086 is a push-to-connect female union tube fitting designed for fast, tool-free connections in plumbing and fluid distribution systems. Built from polyethersulfone (PSU), this fitting accepts a 1/2-inch tube outside diameter on one end and connects to a 3/4-inch female national pipe thread (FNPT) on the other. It is rated to 200 psi, making it suitable for pressure lines in residential and light commercial applications. The EPDM O-ring provides a reliable seal across a range of temperatures and fluid types. Licensed plumbers and pipefitters install this fitting where quick, secure transitions between copper tube sizing (CTS) and threaded pipe are required.

This fitting is used in residential and commercial plumbing systems where push-to-connect technology is preferred over soldering or mechanical compression. Typical applications include water supply lines, HVAC hydronic connections, and fixture supply transitions. The female union design allows the fitting to thread onto existing 3/4-inch FNPT ports while accepting a 1/2-inch OD tube on the push-connect side, reducing installation time and the need for open-flame tools.

Key Features

• Push-to-connect design requires no soldering, crimping, or special tooling for tube insertion
• Polyethersulfone (PSU) body offers high-temperature and chemical resistance
• Rated to 200 psi for use on pressurized water supply lines
• EPDM O-ring seals are compatible with potable water and hydronic fluids
• Female union configuration transitions a 1/2-inch OD CTS tube to a 3/4-inch FNPT threaded connection
• White finish for easy visual identification in mixed-material piping systems

Compatibility

Designed as an OEM-style replacement or new-installation fitting for plumbing systems using 1/2-inch outside diameter CTS tubing with 3/4-inch female NPT threaded ports.

Installation Notes

Installation is performed by licensed plumbers or qualified pipefitters. Shut off and depressurize the water supply line before installing or removing any push-to-connect fitting. Ensure tube ends are cut square and deburred before insertion to achieve a proper seal. Refer to applicable local plumbing codes and IPC standards for approved fitting use in potable water systems.