Polylok 30130-TL 4-Inch Extend & Lok Septic Pipe Extension
Brand: Polylok | SKU: 30130-TL
Product Overview
Position a filter tee where a short tank inlet or outlet pipe makes installation difficult. The Polylok 30130-TL extends the connection and helps place the tee beneath the access riser. Select the four-inch version to match the existing pipe rather than trying to fit a different diameter.
Key Features
- Extends a short inlet or outlet connection.
- Helps center a filter or tee beneath the riser.
- No glue required for the locking extension connection.
Common Uses
Septic filter or baffle retrofits where the existing pipe stub is too short.
Technical Specifications
- Series: Extend & Lok
- Model size: 4 inches
- Connection: 4-inch Schedule 40 socket to 4-inch inside-diameter pipe
Dimensions
- Nominal pipe size: 4 inches
Compatibility & Installation Notes
Check the existing pipe’s inside diameter, condition and available clearance. Plan the extension so the tee remains accessible below the riser. Confirm the separate tee connection requirements; the locking extension connection does not make every other joint glue-free.
Frequently Asked Questions
Is this the three-inch model?
No. The 30130-TL is the four-inch Extend & Lok.
What problem does it address?
It extends a short pipe stub so a filter tee or baffle can be positioned for access.
Why Buy From Big Frog Supply
Choose the four-inch extension when the pipe diameter is correct but the existing stub does not provide enough reach.




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