6X300 CLEAR CAL TUBE

🧾 Breaking it down:

• PL → Perma-Liner system product code
• 204006300 → internal specification series
• FT-6 → 6-inch pipe size application
• FT (300FT roll) → supplied in long continuous roll material

🔧 What it’s used for:

This is not a plumbing fitting you install permanently. It is used during pipe lining rehabilitation, where:

• A resin-impregnated liner is inserted into an existing damaged pipe
• The calibration tube holds and shapes the liner
• It ensures the liner cures properly against the host pipe wall
• Prevents over-expansion or wrinkling during installation

🏗️ Typical applications:

• Sewer line rehabilitation
• Storm drain lining
• Commercial plumbing restoration
• Trenchless pipe repair systems (CIPP method)

⚙️ Key features:

• Reinforced polymer / PVC-coated fabric
• Designed for steam, hot water, or ambient curing processes
• Transparent or semi-clear for visual inspection during curing
• Used with inversion lining equipment
  

🧠 Simple explanation:

It’s basically a special temporary sleeve used inside old sewer pipes during trenchless repair to shape and hold a new pipe lining while it hardens.