Dragon Custom Single Flap Pet Door for Aluminum Sliders
- Custom Single Flap Dragon Pet Door for Aluminum Sliders
- Designed for a perfect fit in aluminum sliding glass doors
- Efficient two-piece flap design with improved insulation
- Quick and easy installation and removal
- Custom orders are made to your specifications and are non-returnable
- Approximately three weeks to build your custom panel pet door

Product Details
The Custom Single Flap Dragon Pet Door for Aluminum Sliders is an economical and efficient solution for pet owners with aluminum sliding glass doors. This pet door is custom-made to your specifications, ensuring a perfect fit while offering the convenience of quick installation and removal.
Constructed with a high-quality aluminum frame, the Dragon Pet Door is designed to blend seamlessly with your existing sliding door. The sturdy polyolefin elastomer flap material keeps your home insulated, while the single-pane, tempered glass is ideal for moderate climates.
Enjoy the benefits of a custom height adjustment range, available by special order, to accommodate various sliding glass door sizes. The spring-loaded design ensures hassle-free installation, making it an excellent choice for vacation homes and rental properties.
The Custom Single Flap Dragon Pet Door for Aluminum Sliders provides your pet with the freedom to come and go without the need for cutting into your door or wall. This low-impact installation is easily removable, perfect for temporary or seasonal use. Upgrade from a single flap to a double flap for added insulation when needed.
Many pet owners have found this Dragon Pet Door to be an affordable yet high-quality alternative to more expensive luxury pet doors. The ease of installation, custom adjustment ranges, and suitability for mild climates make it an attractive choice for those looking for a well-fitting pet door without overspending.
Give your pet the freedom they deserve with the Custom Single Flap Dragon Pet Door for Aluminum Sliders, and enjoy the convenience of a well-designed, efficient, and budget-friendly solution for your sliding glass door.
Don't see your track height? Check out the Single Flap Dragon Pet Door for Aluminum Sliders. Already have a Dragon pet door? See which replacement flap fits your door.
Features:
- High-quality aluminum frame seamlessly complements your aluminum sliding door
- Sturdy polyolefin elastomer flap material for enhanced insulation
- Single-pane, tempered glass ideal for moderate climates
- Custom height adjustment ranges available by special order
- Quick installation and removal with simple spring-loaded design
- Comes with single flap Dragon Pet Door (available in double flap for added insulation)
- Includes a C-Clamp lock to hold the panel in place (you can install a Charley Bar for additional security; we recommend the one from Prime Lime pet door products)
- Extruded aluminum frame made for sliding glass door tracks at least 1” thick (for vinyl sliding doors, see the Dragon Pet Door for Vinyl Sliders)
- Comes with a sturdy, black locking cover to block access when needed
- See the monorail adapter page if you have a monorail track
Benefits:
- Allows pets to come and go without cutting your door or wall
- Quick and low-impact installation
- Easily removable, perfect for temporary or seasonal installation
- Ability to upgrade from single flap to double flap using an Additional Dragon Flap
Size Chart
- Small5 3/8"w x 9"h
- Medium 7 1/16"w x 13 1/16"h
- Large 9 3/8"w x 16 9/16"h
Flap Dimensions:
5 3/8"w x 9"h
The entry way your dog goes through.Step Over Range
3 ¼"
Distance from the bottom of the flap to the floor you pet must step over to enter the pet door.


Overall Panel Width
12 5/16"
How wide the panel is overall.Flap Dimensions:
7 1/16"w x 13 1/16"h
The entry way your dog goes through.Step Over Range
5”
Distance from the bottom of the flap to the floor you pet must step over to enter the pet door.


Overall Panel Width
14 5/8"
How wide the panel is overall.Flap Dimensions:
9 3/8"w x 16 9/16"h
The entry way your dog goes through.Step Over Range
5”
Distance from the bottom of the flap to the floor you pet must step over to enter the pet door.


Overall Panel Width
16 1/8"
How wide the panel is overall.Flap Size | Flap Dimensions | Step Over | Overall Panel Width | Recommended Pet Height* |
---|---|---|---|---|
Small | 5 3/8"w x 9"h | 3 ¼" | 12 5/16" | 9" - 12" |
Medium | 7 1/16"w x 13 1/16"h | 3 7/8" | 13 5/8" | 11" - 16" |
Large | 9 3/8"w x 16 9/16"h | 3 7/8" | 15 1/4" | 11" - 22" |
*measured from the ground to the tallest point of their back.
Do not know which size to get? Here is a measurement guide to help you out.
Wondering how to measure your track? Review our Track Measuring Guide.
Your Track Height Adjustment range is based on the measurement of your door height from the lowest point of your track to the highest point.Each Dragon patio panel has a 3" adjustment range with your window track height approximately in the middle. The following adjustment ranges are available pre-built:
- Short (Size F): 34" – 37"
- Regular (Size J): 46" – 49"
If your measured track height does not fall within one of the ranges above, we can make a custom height. Choose the range that your track height falls into and when ordered you will be asked to give the exact height of your slider track inside very top to very bottom. In each case you will have 3" of height adjustment with the height you specify approximately in the middle of that range. The ranges are:
- Under 74 3⁄4"
- Between 80 1⁄4" – 93 1⁄4"
- Over 96 1⁄4"
Most sliding glass doors will accommodate the three-panel sizes offered. However, if our standard panels do not match your door size, we can build a custom panel for you. We can also custom make a panel for left-to-right sliding sash windows as long as the window track width is at least one inch. Custom height option may take up to 4 weeks to special order the glass and build the panel.
The panels have a 3-inch spring-loaded height adjustment, so if you request a 40" panel, the panel you receive will adjust from 38" to 41" inches. If your measured track height is near the bottom of the adjustment range then you should review A Note of Caution.
Find The Best Pet Door Size For My Pet

A
Pet Height: inches
B
Pet Width: inches
Installation Instructions

Parts
- 1 Panel Pet Door with a Pre-Installed Dragon Pet Door
- 1 Foam Weather Strip Seal
- 1 C-Clamp Lock
- 1 Locking Cover
Tools
- Flathead screwdriver
Please read instructions & notes thoroughly before installation.
One-Piece Panel
Step 1 Adjust the Top Piece

- Loosen the height adjustment locks at the top of the panel. This allows the spring mechanism to move freely up and down.
Step 2 Test-Fit the Panel

- Insert the panel into the top track of your framing, push the panel into the spring mechanism and swing the bottom of the panel up and over the threshold into the rail at the bottom.
- If you can't quite clear the track, try swinging in from the outside as the outside track wall may be shorter.
Step 3 Apply the Weather Stripping

- Once you have confirmed the panel fits, remove the panel from the track and lay it on its side.
- Apply the foam weather-stripping by peeling back the paper and exposing the adhesive. Unroll it along the edge of the panel, pressing to ensure it adheres.
- Use scissors to trim the strip to fit the length of your panel.
- Flip your panel around to apply on the other side.
Step 4 Install the Panel



- Place the panel back into the sliding glass door, then tighten the height adjustment locks to lock it in place. Installation complete!

Parts
- 1 Panel Pet Door with a Pre-Installed Dragon Pet Door
- 1 Foam Weather Strip Seal
- 1 C-Clamp Lock
- 1 Locking Cover
- 4 Flathead Screws
- Flathead screwdriver
Tools
- Flathead screwdriver
- Philips-head screwdriver (for sectional)
Please read instructions & notes thoroughly before installation.
Sectional Panel
SECTIONAL ASSEMBLY
Step 1 Loosen the Screws

- With a Phillips-head screwdriver, loosen the top two screws of the Dragon frame to make room for the glass section to fit inside.
Step 2 Connect the Sections

- Slide the flap section into the glass section. Make sure the locking cover is on the same side as the height adjustment locks on the glass section.
- Keep adjusting the flap section until it is fully flush with the glass section.
- Alternatively, pick up the panel and tap it on the ground on a soft surface.
Step 3 Fasten the Sections Together

- Fasten the sections by screwing in two connector screws each into the section connectors on both sides with the provided flat head screwdriver.
- Tighten down all eight connector screws.
Step 4 Secure the Pet Door Frame

- Retighten the two Dragon frame screws until the Dragon frames are flush with the glass section.
- Press the nut into the frame to keep it from rotating.
- Proceed with the regular Dragon panel Instructions below.
Step 5 Adjust the Top Piece

- Loosen the height adjustment locks at the top of the panel. This allows the spring mechanism to move freely up and down.
Step 6 Test-Fit the Panel

- Insert the panel into the top track of your framing, push the panel into the spring mechanism and swing the bottom of the panel up and over the threshold into the rail at the bottom.
- If you can't quite clear the track, try swinging in from the outside as the outside track wall may be shorter.
Step 7 Apply the Weather Stripping

- Once you have confirmed the panel fits, remove the panel from the track and lay it on its side.
- Apply the foam weather-stripping by peeling back the paper and exposing the adhesive. Unroll it along the edge of the panel, pressing to ensure it adheres.
- Use scissors to trim the strip to fit the length of your panel.
- Flip your panel around to apply on the other side.
Step 8 Install the Panel



- Place the panel back into the sliding glass door, then tighten the height adjustment locks to lock it in place. Installation complete!
Dragon Locking Details
Since you cannot lock your sliding glass door to your panel pet door, we have provided you with an alternative locking method to secure your home.
Installing the Clamp Lock
- This clamp has a screw that tightens by hand to prevent the sliding door from moving beyond the clamp’s placement.
- For doors manufactured with the glass slider on the inside track, the lock can usually be installed on the door’s raised track.

Locking the Flap
- The Dragon Pet Door comes with a secure locking cover to block access to the flap when needed.
- The locking cover is a great perfect for keeping pets inside at night, or for blocking access to the flap when you're away.
Alternative Locking Method
- A great alternative to locking your sliding glass door is a Charley bar or dowel in the track.
- Both work off the same concept—they block the slider from opening. When engaged you cannot pull the sliding door away from the pet door panel.

FREQUENTLY ASKED QUESTIONS
What if my panel is slightly too tall?
You can trim up to 3/4” off the spring- loaded adjustment piece at the top. This can be done by removing the adjustment pieces with a #2 Phillips head screwdriver and cutting down the flanges. Be careful not to cut too low or you will not be able to put the top back on.

The dark area marks where you can trim:

What if my panel is slightly too short?
We offer height extensions that will add 3/4” to the top of the panel that you slide into the channel at the top. These are made from the same aluminum as the panel so you can match the color.
You can also make your own extension out of nominal 1” wood (which is 3/4” thick), such as a 1x3, if you need more than 3/4" in height. Cut it to the same width as the panel and slide it into the channel at the top. Paint the wood to match your frame color. If the extension makes the panel feel unstable, you can secure it with screws.

What if the panel is wobbling slightly back and forth?
If your track is wider than 1” you can use small wooden shims or extra weather-stripping to fill in the gap inside the top and bottom tracks. By placing the material inside the tracks you won't be able to see it, but it will stabilize the panel.
FAQ
What's the difference between the single flap and the double flap? The double flap option provides increased insulation against the cold. Both pet door sliding door insert options have magnets on the flap to keep the door sealed in wind. |
I want to get the large pet door for my dog, but I am concerned about a person fitting through it. All Dragon Pet Doors come with a locking cover. This cover can be used to keep you doggy in. It also can be used to keep intruders from entering your home. It slides into the interior frame. |
How heavy are these panels? The average weight of the Dragon Single Flap Aluminum Sliding Door Panel is 27.6 lbs, making it easy to install and remove in a matter of minutes. |
How do I know what size is best for my dog? When installing the pet door you want it to clear the top of your dog's back by 1-2 inches, minimum. To give your pet the most comfortable pet door possible, make sure the step-over is less than 1/3 of your dog's height. Lastly you want the width of the door to be big enough to allow your pet to go through without touching the sides. Here's a guide on how to measure your pet with tips on how to determine the correct size. |
Are replacement flaps available? Yes, you can buy Dragon replacement flaps. |
Where can I install the Dragon Pet Door? The Dragon Pet Door has multiple Installation options. You can install it in Regular Doors, as a Wall mount, Aluminum Sliding Doors, Vinyl Sliding Doors, Sash Windows, Vinyl Windows, and large dog doors through glass might be the solution for you. |
How much does shipping cost? Shipping is calculated at checkout. |
Warranty
Dragon Pet Doors One Year Warranty
Dragon Pet Doors have a one-year warranty for normal wear & tear and manufacturing defects.
Customer Reviews

Size Chart
- Small5 3/8"w x 9"h
- Medium 7 1/16"w x 13 1/16"h
- Large 9 3/8"w x 16 9/16"h
Flap Dimensions:
5 3/8"w x 9"h
The entry way your dog goes through.Step Over Range
3 ¼"
Distance from the bottom of the flap to the floor you pet must step over to enter the pet door.


Overall Panel Width
12 5/16"
How wide the panel is overall.Flap Dimensions:
7 1/16"w x 13 1/16"h
The entry way your dog goes through.Step Over Range
5”
Distance from the bottom of the flap to the floor you pet must step over to enter the pet door.


Overall Panel Width
14 5/8"
How wide the panel is overall.Flap Dimensions:
9 3/8"w x 16 9/16"h
The entry way your dog goes through.Step Over Range
5”
Distance from the bottom of the flap to the floor you pet must step over to enter the pet door.


Overall Panel Width
16 1/8"
How wide the panel is overall.Flap Size | Flap Dimensions | Step Over | Overall Panel Width | Recommended Pet Height* |
---|---|---|---|---|
Small | 5 3/8"w x 9"h | 3 ¼" | 12 5/16" | 9" - 12" |
Medium | 7 1/16"w x 13 1/16"h | 3 7/8" | 13 5/8" | 11" - 16" |
Large | 9 3/8"w x 16 9/16"h | 3 7/8" | 15 1/4" | 11" - 22" |
*measured from the ground to the tallest point of their back.
Do not know which size to get? Here is a measurement guide to help you out.
Wondering how to measure your track? Review our Track Measuring Guide.
Your Track Height Adjustment range is based on the measurement of your door height from the lowest point of your track to the highest point.Each Dragon patio panel has a 3" adjustment range with your window track height approximately in the middle. The following adjustment ranges are available pre-built:
- Short (Size F): 34" – 37"
- Regular (Size J): 46" – 49"
If your measured track height does not fall within one of the ranges above, we can make a custom height. Choose the range that your track height falls into and when ordered you will be asked to give the exact height of your slider track inside very top to very bottom. In each case you will have 3" of height adjustment with the height you specify approximately in the middle of that range. The ranges are:
- Under 74 3⁄4"
- Between 80 1⁄4" – 93 1⁄4"
- Over 96 1⁄4"
Most sliding glass doors will accommodate the three-panel sizes offered. However, if our standard panels do not match your door size, we can build a custom panel for you. We can also custom make a panel for left-to-right sliding sash windows as long as the window track width is at least one inch. Custom height option may take up to 4 weeks to special order the glass and build the panel.
The panels have a 3-inch spring-loaded height adjustment, so if you request a 40" panel, the panel you receive will adjust from 38" to 41" inches. If your measured track height is near the bottom of the adjustment range then you should review A Note of Caution.
Find The Best Pet Door Size For My Pet

A
Pet Height: inches
B
Pet Width: inches
Installation Instructions

Parts
- 1 Panel Pet Door with a Pre-Installed Dragon Pet Door
- 1 Foam Weather Strip Seal
- 1 C-Clamp Lock
- 1 Locking Cover
Tools
- Flathead screwdriver
Please read instructions & notes thoroughly before installation.
One-Piece Panel
Step 1 Adjust the Top Piece

- Loosen the height adjustment locks at the top of the panel. This allows the spring mechanism to move freely up and down.
Step 2 Test-Fit the Panel

- Insert the panel into the top track of your framing, push the panel into the spring mechanism and swing the bottom of the panel up and over the threshold into the rail at the bottom.
- If you can't quite clear the track, try swinging in from the outside as the outside track wall may be shorter.
Step 3 Apply the Weather Stripping

- Once you have confirmed the panel fits, remove the panel from the track and lay it on its side.
- Apply the foam weather-stripping by peeling back the paper and exposing the adhesive. Unroll it along the edge of the panel, pressing to ensure it adheres.
- Use scissors to trim the strip to fit the length of your panel.
- Flip your panel around to apply on the other side.
Step 4 Install the Panel



- Place the panel back into the sliding glass door, then tighten the height adjustment locks to lock it in place. Installation complete!

Parts
- 1 Panel Pet Door with a Pre-Installed Dragon Pet Door
- 1 Foam Weather Strip Seal
- 1 C-Clamp Lock
- 1 Locking Cover
- 4 Flathead Screws
- Flathead screwdriver
Tools
- Flathead screwdriver
- Philips-head screwdriver (for sectional)
Please read instructions & notes thoroughly before installation.
Sectional Panel
SECTIONAL ASSEMBLY
Step 1 Loosen the Screws

- With a Phillips-head screwdriver, loosen the top two screws of the Dragon frame to make room for the glass section to fit inside.
Step 2 Connect the Sections

- Slide the flap section into the glass section. Make sure the locking cover is on the same side as the height adjustment locks on the glass section.
- Keep adjusting the flap section until it is fully flush with the glass section.
- Alternatively, pick up the panel and tap it on the ground on a soft surface.
Step 3 Fasten the Sections Together

- Fasten the sections by screwing in two connector screws each into the section connectors on both sides with the provided flat head screwdriver.
- Tighten down all eight connector screws.
Step 4 Secure the Pet Door Frame

- Retighten the two Dragon frame screws until the Dragon frames are flush with the glass section.
- Press the nut into the frame to keep it from rotating.
- Proceed with the regular Dragon panel Instructions below.
Step 5 Adjust the Top Piece

- Loosen the height adjustment locks at the top of the panel. This allows the spring mechanism to move freely up and down.
Step 6 Test-Fit the Panel

- Insert the panel into the top track of your framing, push the panel into the spring mechanism and swing the bottom of the panel up and over the threshold into the rail at the bottom.
- If you can't quite clear the track, try swinging in from the outside as the outside track wall may be shorter.
Step 7 Apply the Weather Stripping

- Once you have confirmed the panel fits, remove the panel from the track and lay it on its side.
- Apply the foam weather-stripping by peeling back the paper and exposing the adhesive. Unroll it along the edge of the panel, pressing to ensure it adheres.
- Use scissors to trim the strip to fit the length of your panel.
- Flip your panel around to apply on the other side.
Step 8 Install the Panel



- Place the panel back into the sliding glass door, then tighten the height adjustment locks to lock it in place. Installation complete!
Dragon Locking Details
Since you cannot lock your sliding glass door to your panel pet door, we have provided you with an alternative locking method to secure your home.
Installing the Clamp Lock
- This clamp has a screw that tightens by hand to prevent the sliding door from moving beyond the clamp’s placement.
- For doors manufactured with the glass slider on the inside track, the lock can usually be installed on the door’s raised track.

Locking the Flap
- The Dragon Pet Door comes with a secure locking cover to block access to the flap when needed.
- The locking cover is a great perfect for keeping pets inside at night, or for blocking access to the flap when you're away.
Alternative Locking Method
- A great alternative to locking your sliding glass door is a Charley bar or dowel in the track.
- Both work off the same concept—they block the slider from opening. When engaged you cannot pull the sliding door away from the pet door panel.

FREQUENTLY ASKED QUESTIONS
What if my panel is slightly too tall?
You can trim up to 3/4” off the spring- loaded adjustment piece at the top. This can be done by removing the adjustment pieces with a #2 Phillips head screwdriver and cutting down the flanges. Be careful not to cut too low or you will not be able to put the top back on.

The dark area marks where you can trim:

What if my panel is slightly too short?
We offer height extensions that will add 3/4” to the top of the panel that you slide into the channel at the top. These are made from the same aluminum as the panel so you can match the color.
You can also make your own extension out of nominal 1” wood (which is 3/4” thick), such as a 1x3, if you need more than 3/4" in height. Cut it to the same width as the panel and slide it into the channel at the top. Paint the wood to match your frame color. If the extension makes the panel feel unstable, you can secure it with screws.

What if the panel is wobbling slightly back and forth?
If your track is wider than 1” you can use small wooden shims or extra weather-stripping to fill in the gap inside the top and bottom tracks. By placing the material inside the tracks you won't be able to see it, but it will stabilize the panel.
FAQ
What's the difference between the single flap and the double flap? The double flap option provides increased insulation against the cold. Both pet door sliding door insert options have magnets on the flap to keep the door sealed in wind. |
I want to get the large pet door for my dog, but I am concerned about a person fitting through it. All Dragon Pet Doors come with a locking cover. This cover can be used to keep you doggy in. It also can be used to keep intruders from entering your home. It slides into the interior frame. |
How heavy are these panels? The average weight of the Dragon Single Flap Aluminum Sliding Door Panel is 27.6 lbs, making it easy to install and remove in a matter of minutes. |
How do I know what size is best for my dog? When installing the pet door you want it to clear the top of your dog's back by 1-2 inches, minimum. To give your pet the most comfortable pet door possible, make sure the step-over is less than 1/3 of your dog's height. Lastly you want the width of the door to be big enough to allow your pet to go through without touching the sides. Here's a guide on how to measure your pet with tips on how to determine the correct size. |
Are replacement flaps available? Yes, you can buy Dragon replacement flaps. |
Where can I install the Dragon Pet Door? The Dragon Pet Door has multiple Installation options. You can install it in Regular Doors, as a Wall mount, Aluminum Sliding Doors, Vinyl Sliding Doors, Sash Windows, Vinyl Windows, and large dog doors through glass might be the solution for you. |
How much does shipping cost? Shipping is calculated at checkout. |
Warranty
Dragon Pet Doors One Year Warranty
Dragon Pet Doors have a one-year warranty for normal wear & tear and manufacturing defects.