Legris 3104 56 53 Push-to-connect Union Tube Fitting

Product Description

The LEGRIS 3104 56 53 is a push-to-connect union tube fitting designed to join two tube lines without tools or threaded connections. It accommodates a 1/8 inch OD tube on one port and a 1/4 inch OD tube on the other, making it suitable for reducing or transitioning between two tube sizes in a single inline connection. Constructed from nylon, the fitting is rated for up to 290 psi and is well suited for pneumatic control lines, instrumentation tubing, and low-pressure fluid transfer applications. HVAC technicians, plumbers, and controls technicians routinely use push-to-connect fittings of this type where quick, reliable tube connections are required in tight spaces.

This fitting is used in residential and light commercial pneumatic and fluid control systems where different tube sizes must be joined inline. Common install scenarios include control line runs on HVAC equipment, compressed air distribution, and instrumentation circuits. The push-to-connect design allows the tube to be inserted and locked in a single motion, reducing assembly time compared to compression or barbed alternatives. The nylon body resists common chemicals and moisture encountered in mechanical room and equipment cabinet environments.

Key Features

• Push-to-connect design allows tool-free tube insertion and secure locking
• Reduces or transitions between 1/8 inch OD and 1/4 inch OD tube sizes in a single fitting
• Nylon construction provides chemical and moisture resistance
• Rated to 290 psi for use in pneumatic and low-pressure fluid applications
• Compact inline profile fits tight equipment cabinets and control panels

Compatibility

Designed as an OEM-style push-to-connect replacement for pneumatic and fluid control tubing applications using 1/8 inch OD and 1/4 inch OD tubing.

Installation Notes

Installation is typically performed by HVAC technicians or controls technicians. Before servicing any pneumatic or fluid line, depressurize the circuit completely and confirm zero pressure with a gauge before disconnecting existing fittings. Ensure tube ends are cut cleanly and squarely with a tubing cutter for a proper seal. Do not exceed the 290 psi pressure rating of the fitting.