Compression Fittings

Match the fitting bore diameter to your pipe or tubing outer diameter and confirm whether the fitting is rated for the pipe material (copper, stainless steel, plastic). Also check pressure and temperature ratings and compatibility with the media being conveyed

Common types include straight unions, elbows, tees, and adapters; use unions to join two pipes, elbows to change direction, tees to split flow, and adapters to transition between thread types or sizes. Choose type based on system layout and connection requirements

Many compression fittings can be disassembled and reassembled a limited number of times, but repeated reuse can deform ferrules and reduce seal integrity; for critical or high-pressure applications, replace ferrules or the entire fitting after disassembly

Basic tools include appropriate-sized wrenches or spanners and, for some systems, a tubing cutter and deburring tool; use a torque wrench if the manufacturer specifies torque values to avoid over-tightening

Ensure tubing is cut square and deburred, fully insert tubing to the fitting shoulder, tighten to the recommended seating torque or turns, and inspect ferrules and threads for damage; pressure-test the joint after installation

Pressure and temperature ratings vary by material and design; metal fittings generally handle higher pressures and temperatures than plastic ones, so confirm ratings for your application and include safety margins for transient conditions

Visually inspect fittings for corrosion, leaks, or loose connections, re-tighten per manufacturer guidance if safe to do so, and replace damaged ferrules or fittings; keep records of maintenance for systems under regulatory oversight