How to Install Ferrule Fittings – PE-LOCK Assembly Guide for Leak-Proof Connections

Tools You’ll Need

• Tube cutter (for square, burr-free cuts)
• Deburring tool (ID & OD)
• Tube sizing gauge
• PE-LOCK spanner set / open-end wrenches
• Marker or scribe
• Caliper (optional for precision insertion depth)

Step-by-Step Guide – Installing Double Ferrule Fittings

 Step 1: Cut the Tube

• Use a tubing cutter to create a square, clean cut
• Avoid hacksaws or angled cuts
• Ensure no deformation occurs on the tube end

Step 2: Deburr the Tube

• Deburr inside and outside edges of the tube with a deburring tool
• This ensures proper ferrule grip and prevents damage to sealing surfaces

Step 3: Insert the Tube

• Slide the nut and both ferrules (back first, then front) onto the tube
• Insert the tube into the fitting body until it bottoms against the shoulder
• Rotate the tube slightly to ensure it’s fully seated

Step 4: Mark the Tube

• Use a marker to draw a line along the nut and fitting body
• This helps you visually confirm when a full turn has been completed

Step 5: Tighten the Nut

First Installation (New Fitting)

• Tighten the nut 1-1/4 turns from finger-tight position
• Use your markings to guide the rotation