Pro-source 2559011963PRO Push-to-connect Tube Stem Fitting

Product Description

The PRO-SOURCE 2559011963PRO is a push-to-connect tube to stem tube fitting designed for fast, tool-free connections in fluid and pneumatic systems. Built from nickel-plated brass, it accepts tubing with a 1/4 inch outside diameter and connects to a stem with a 1/2 inch outside diameter. It is rated to 250 psi maximum working pressure and handles temperatures from 0 degrees F to 160 degrees F. The Buna O-ring provides a reliable seal for both compressed air and water service. Plumbers, HVAC technicians, and industrial maintenance professionals install this fitting where quick, repeatable tube connections are required without soldering or threading.

This fitting is suited for residential and light commercial applications involving compressed air lines and water supply tubing. Typical install scenarios include pneumatic control systems, air tool drops, small-bore water lines, and equipment connections where tubing must be secured and released repeatedly during service. The 1/4 inch OD tube size is common in instrumentation, refrigeration accessory lines, and low-pressure pneumatic circuits. The push-to-connect design reduces installation time compared to compression or flare fittings in accessible, low-vibration environments.

Key Features

• Push-to-connect design allows tool-free tube insertion and release
• Nickel-plated brass construction resists corrosion in wet and air service
• Rated to 250 psi maximum working pressure
• Operating temperature range of 0 degrees F to 160 degrees F
• Buna O-ring included for reliable sealing on compressed air and water
• Accepts 1/4 inch OD tubing with a 1/2 inch OD stem connection

Compatibility

Designed for use with compressed air and water systems using 1/4 inch OD tubing. Suitable as an OEM-style push-to-connect replacement fitting in pneumatic and plumbing applications where the tube and stem dimensions match those specified.

Installation Notes

Installation is performed by licensed plumbers or qualified HVAC or pneumatic technicians. Before installation, depressurize and isolate the line and verify the tubing cut is clean, square, and free of burrs to ensure a proper O-ring seal. Do not exceed the rated working pressure or temperature limits. Consult applicable plumbing codes such as the IPC for water service installations.