Assembling new metallic fittings

To ensure proper assembly, you must mark new metallic fittings before tightening them.

Required tools and materials

• Chemical-resistant, powder-free gloves
• Protective eyewear
• 1/4-inch open-end wrench, for metallic fittings with two-piece ferrules
• Permanent marker

To assemble a new metallic fitting:

1. Insert the end of a tube into the hexagonal end of the compression screw.
2. Insert the tube into the larger end of the ferrule.
3. Insert the tube into the connection port.
4. Rotate the compression screw clockwise into the connection port until the screw is finger-tight.
   Note: Before tightening compression screws, ensure that the tubing is fully bottomed in its connection port.
5. Using the permanent marker, mark the compression screw at the 12-o’clock position.
6. Using the permanent marker, mark the connection port at the 9-o’clock position.
7. Ensure that the tubing makes contact with the bottom of the connection port, and then use the 1/4-inch open-end wrench to rotate the compression screw clockwise 3/4-turn until the two marks line up.
   Note: Before tightening compression screws, ensure that the tubing is fully bottomed in its connection port.