Monorail Adapters
Creates a secure, custom-fit channel for monorail sliding doors.
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Monorail sliding glass doors often leave standard patio inserts with too much room to shift, tilt, or feel unsupported. This adapter solves that problem by creating a defined channel that holds your Thermo Panel firmly in place. The result is a more stable installation that feels intentional, not improvised.
Once installed, the adapter improves how the panel sits within the track, reducing side-to-side movement and helping maintain consistent alignment over time. This added stability can make everyday use smoother, especially in homes with active pets or frequent door traffic.
The design is straightforward and purpose-built for Endura aluminum panels, ensuring compatibility without the need for workarounds. Pre-punched guide holes help position the adapter correctly, while final drilling allows it to be securely fastened for long-term use.
While the Thermo Panel itself is typically tool-free, the adapter adds a more anchored solution for monorail systems that benefit from additional support. It remains removable if needed, making it a practical option for both permanent and transitional living situations.
In colder climates, some airflow or condensation may still occur due to the nature of monorail systems, but the adapter helps reduce excess gaps and improves overall fit compared to unsupported installations.
Installation & Fit
Installation & Fit
Best Suited For
Best Suited For
Questions
Questions
What's in the box?
- Monorail Adapter
- 2 10-24 Stainless Steel Acorn nuts
- 2 10-24 x 1-1/8" Stainless Steel Screws
Size & Measurement Guide
Refund policy
We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.
To be eligible for a return, your item must in new, resellable condition. Pet doors that have been installed are not eligible for return. Custom orders are final sale and not eligible for return.
To start a return, you can contact us at customerservice@petdoors.com. Please note that returns will need to be sent to the following address: 254 Granada Drive, San Luis Obispo CA 93401
If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.
You can always contact us for any return question at customerservice@petdoors.com.
Damages and issues
Please inspect your order upon reception and contact us within 7 business days if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.
Exceptions / non-returnable items
Custom products are final sale and not eligible for return.
Exchanges
We do not offer exchanges. The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.
European Union 14 day cooling off period
Notwithstanding the above, if the merchandise is being shipped into the European Union, you have the right to cancel or return your order within 14 days, for any reason and without a justification. As above, your item must be in the same condition that you received it. You’ll also need the receipt or proof of purchase.
Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method within 10 business days. Please remember it can take some time for your bank or credit card company to process and post the refund too.
If more than 15 business days have passed since we’ve approved your return, please contact us at customerservice@petdoors.com.
The table below shows manufacturer policies for returns. In all cases, the items must be uninstalled and in original condition. All items that ship from PetDoors.com warehouse or are drop-shipped from a different warehouse have a 30-day return policy.
Items shipped from PetDoors.com warehouse, after 30 Day Rules (non-Endura Flap products):
- After 30 days, Items that are returned have a 15% restocking fee.
- After 60 days, Items that are returned have a 20% restocking fee.
- After 90 days, Items that are returned have a 35% restocking fee.
- Items cannot be accepted after 120 days.
After 90 Day Rules for Endura Flap Products:
- After 90 days, Items that are returned have a 15% restocking fee.
- After 120 days, Items that are returned have a 20% restocking fee.
- After 150 days, Items that are returned have a 35% restocking fee.
- Items cannot be accepted after 365 days.
Time frames begin the day that you receive your order. Please understand that we as PetDoors.com have no control over drop-shipper restrictions, and if your item was drop-shipped from a different manufacturer warehouse, it is very unlikely that a return will be accepted past the 30-day time frame.
Do you charge shipping for returns? We will send you a label for all returns in the US, but the return label is not free and is charged to your account. We do not refund any of the original shipping charges initially paid on the order.
If you are not satisfied with your purchase for any reason, and need to return pet door products please email customerservice@petdoors.com or call (800) 826-2871 to submit a return request for a Return Merchandise Authorization (RMA) number within 30 days of receipt (90 days for Endura Flap products). To receive a refund of the merchandise cost the return item must be in original, resalable condition within 30 days of receipt for a full refund on the product cost.
When shipping returns back please make sure to package them properly to prevent damage. The label will have the proper return address already on it, as some items will need to go back to the drop ship company they originated from. All refunds will amount to the cost of the item, including taxes if applicable. We do not refund paid shipping. We process returns daily with the exception of weekends and holidays.
Company Name |
Ships from Mfr. |
Return Policy |
| Pet Door Products | Yes | No Returns |
| Endura Flap | No | 90 Days |
| Liberty Pet Doors | No | 30 Days |
| Hale Pet Doors | Yes | 30 Days |
| High Tech Power Pet | Yes | 30 Days |
| Ideal Pet Products | Yes | 30 Days |
| Magnador | Yes | 30 Days |
| Pet Door Guys | Yes | No Returns |
| Utah Pet Access | Yes | No Returns |
| Petsafe | Yes | 30 Days |
| Pride Pet Doors | No | 30 Days |
| Watchdog | Yes | 30 Days |
Product Details
Product Details
Monorail sliding glass doors often leave standard patio inserts with too much room to shift, tilt, or feel unsupported. This adapter solves that problem by creating a defined channel that holds your Thermo Panel firmly in place. The result is a more stable installation that feels intentional, not improvised.
Once installed, the adapter improves how the panel sits within the track, reducing side-to-side movement and helping maintain consistent alignment over time. This added stability can make everyday use smoother, especially in homes with active pets or frequent door traffic.
The design is straightforward and purpose-built for Endura aluminum panels, ensuring compatibility without the need for workarounds. Pre-punched guide holes help position the adapter correctly, while final drilling allows it to be securely fastened for long-term use.
While the Thermo Panel itself is typically tool-free, the adapter adds a more anchored solution for monorail systems that benefit from additional support. It remains removable if needed, making it a practical option for both permanent and transitional living situations.
In colder climates, some airflow or condensation may still occur due to the nature of monorail systems, but the adapter helps reduce excess gaps and improves overall fit compared to unsupported installations.
Size Chart
| PET DOOR SIZE | FLAP DIMENSION |
|---|---|
|
Endura Flap Pet Doors |
|
| Small | 6" w x 11" h |
| Medium | 8" w x 15" h |
| Large | 10" w x 19" h |
| Extra Large | 12" w x 23" h |
| XXL | 14" w x 27" h |
|
Liberty Pet Doors |
|
| Cat Door | 7"w x 8"h |
| Small | 5"w x 12"h |
| Medium | 7"w x 16"h |
| Large | 9"w x 20"h |
| Extra Large | 11"w x 24"h |
| XXL | 13"w x 28"h |
Do not know which size to get? Here is a measurement guide to help you out
Installation Information
Monorail Adapter
Parts
- Monorail Adapter
- 2 10-24 Stainless Steel Acorn nuts
- 2 10-24 x 1-1/8" Stainless Steel Screws
Tools
- Drill with a 3/8“ bit for drilling metal
- Clamps (Optional, but helpful)
Before drilling into your panel, test fit which side of the monorail adapter (1” or 1-1/2") depth will fit over your track the best without any gaps.
Step 1 Test Fit the Adapter
Step 2 Lay the Panel Flat & Drill the Holes
Step 3 Apply Weatherstripping
Step 4 Position In Slider Track
Step 5 Bolt on monorail
Step 6 Release Height Adjustment Mechanism
Videos
Monorail adapapter
Customer Reviews
Request Freight Quote
Track heights exceeding 106 inches (107" or higher) may require additional shipping charges. Please provide your contact information for a custom freight quote, and our team will follow up during normal business hours.











Product Details







