3/4" Elbow Union

3/4" Elbow Union (ELUN3400) - SmartLock Compression Fitting

Connect 3/4" copper or aluminum tubes at a 90° angle without brazing or flaring. SmartLock ELUN3400 uses patented metal-to-metal sealing technology for permanent, zero-leak joints under pressure. Standard wrenches align and tighten components automatically, letting technicians skip open flames and finish installs faster.

What's in the Box (pre-assembled)

• One SmartLock ELUN3400 elbow union body
• Two union nuts
• Two ferrules
• One positioning strip

Key Features

• No brazing or flaring required. Tighten nuts to seal tubes without heat or flame.
• 90° angle connection. Built-in elbow allows tight-space installations without separate fittings.
• Automatic alignment. Positioning strip holds ferrules and body in perfect alignment for smooth assembly.
• Metal-to-metal seal. Compression ferrules deform to seal under high pressure for lasting, leak-free joints.
• Over-torque prevention. Built-in stops prevent nuts from overtightening and damaging the fitting.
• Corrosion-resistant finish.

Compatibility

• Works with all common refrigerants, including R-410A, R-22, R-134a, R-744, R-717 and A2L blends.
• Suitable for copper-to-copper, copper-to-aluminum and aluminum-to-aluminum connections.

Installation & Tools

• Tools needed. Standard open-end or adjustable wrenches only.
• Installation tip. Hand-start nuts on tubes, then wrench-tighten until the fitting's torque stop engages.