How Flexible Is the Flexible Exhaust Pipe (Part #20476492)?
Despite its name, the Flexible Exhaust Pipe (part number 20476492) should not be mistaken for something designed to bend easily. The term flexible refers more accurately to the pipe’s adaptability during installation, not to its physical bendability. Understanding this distinction is key to proper use and long-term performance.
Telescoping Adjustment for Height and Length
One of the core features of this exhaust pipe is its ability to adjust in height. The pipe sections are engineered to slide into one another, much like a trombone. This telescoping design allows installers to fine-tune the length of the pipe, making it easier to align with flue components in a variety of configurations.
Customizing the 90° Bend (New Pipes Only)
The pipe comes with a native 90° bend, but some experienced dealers and installers choose to carefully modify this angle to suit unique installation needs. Common customizations include reducing the bend to approximately 45°, or in some cases, straightening it almost completely.
Important Guidelines for Modification:
- Only new, unused pipes should be modified.
- Modifications must be performed slowly and carefully to avoid structural damage.
- This practice is not officially recommended, but may be used by trained professionals with caution.
Why Used Pipes Should Never Be Modified
Once the pipe has been exposed to exhaust heat, the internal structure of the metal changes. This heat exposure “sets” the metal, making it significantly more rigid. The corrugated joint and surrounding material become more brittle due to this heat treatment effect.
Attempting to alter a used pipe may result in:
- Cracking at the bend or joint
- Complete pipe failure during operation
- Loss of warranty coverage due to improper handling
Summary
The Flexible Exhaust Pipe (20476492) offers valuable adaptability through its telescoping design and initial malleability. However, any modifications must be approached with caution and only performed on brand new units. Understanding these limitations and best practices ensures safe, reliable, and effective installation performance.