Why Duct Pressure Testing is Crucial Before Fiber Cable Jetting?

Fiber optic cable jetting has become the go-to method for swift and efficient fiber optic cable installations. But before unleashing the air cannons of your cable jet machine, a crucial step ensures a smooth and successful operation: the duct pressure test.

Why Test?

Imagine this: you’re mid-jet, propelling the cable through the duct with confidence, only to encounter a hidden leak halfway through. The pressure drops, the cable gets stuck, and the installation screeches to a halt. This is where the duct pressure test comes in – a preventative measure that identifies potential issues before they become costly delays.

Benefits of Duct Pressure Testing:

• Leak Detection: It uncovers hidden leaks or weaknesses in the duct system. Leaks can significantly impact the efficiency of the jetting process by causing pressure drops and hindering cable movement.
• Obstruction Discovery: The test can reveal undetected blockages within the duct, such as debris buildup or collapsed sections. These obstructions can damage the cable during jetting.
• Peace of Mind: Knowing your duct system is airtight and clear provides peace of mind and allows you to proceed with the jetting process confidently.

Testing 1, 2, 3:

Here’s a simplified breakdown of the duct pressure test:

1. Seal the Deal: Seal one end of the duct securely. This is typically done with a specialized plug or cap.
2. Pressurize the System: Introduce compressed air into the duct using a pressure gauge. The specific pressure level may vary depending on the duct material and size, but it’s typically within a safe range established by industry standards.
3. Hold and Observe: Monitor the pressure gauge over a designated period (usually 5-10 minutes). A consistent pressure reading indicates a leak-free system.
4. Release and Repeat: Once the test is complete, slowly release the pressure and repeat the process for other sections of the duct system, if applicable.

Bonus Tip: While the pressure test is a valuable tool, it’s recommended to also perform a visual inspection of the duct for any obvious damage or debris build-up.