3 Flap Large Dog Door for Sliding Glass Door, Openable Pet Door for Sliding Glass Doors, Adjustable 75 7/8" to 81" Slider Height-Large
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Availability:
Only 1 left in stock, order soon!
Arrives
May 20 – May 25
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Color: 81" Sliding Door
Size: Large - 3 Flap
Features
- Attention Before Purchase: Our 3 flap glass dog door has a fixed - swing mechanism. If it's installed on the left side of the glass door, it can only open inward. If installed on the right side, it can only open outward. This is non - adjustable because of the design structure. Also, note that installation demands using a drill to bore holes in the door frame.
- Openable Design: Our 3 flap dog door for sliding glass doors opens inward to maximize limited space, making it easy for people to move items in and out of the backyard. Additionally, we've filed for a patent.
- Adjustable Height: The large doggie door for the sliding door frame adjusts from 75 - 7/8" to 81" in height, with a glass door width of 14.8". This fits most villa and patio sliding glass doors. To ensure the correct height, measure from the top track to the inner bottom track of your aluminum sliding door frame.
- Superior Insulation & Weather Protection: The 3-flap pet door for sliding glass combines advanced insulation technology with a triple-flap system and double magnetic closureslocking out drafts, rain, and wind while keeping your home energy-efficient.
- Perfect for Large Pets: Our sliding glass door pet door features a semi - transparent flap that measures 10wide by 16high. This size provides a clear view and easy passage for pets weighing up to 100 pounds. Additionally, it comes with a safety lock, enhancing home security while allowing you to control your pet's access.
Size: Large - 3 Flap
Brand: Eillion
Color: 81" Sliding Door
Material: Glass, Metal
Mattress Thickness: 2 Inches
Size: Large - 3 Flap
Maximum Compatible Thickness: 2 Inches
Weight Capacity Maximum: 100 Pounds
Dog Breed Size: Large
Pet Type: Cat, Dog
Closure Type: Magnetic
Material Type: Glass, Metal
Frame Material: Aluminum
Brand Name: Eillion
Model Number: Large Dog Door for Sliding Glass Door
Manufacturer Part Number: Dog Door for Sliding Glass Doors
Unit Count: 1.0 Count
Manufacturer: Eillion
Color: 81" Sliding Door
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
May 20 – May 25
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: 81" Sliding Door
Size: Xlarge - 1 Flap
The media could not be loaded. We have two large dogs and it has been a challenge to find a dog door that is big enough for them to go in and out. This dog door has been a dream come true for us. We do not have to get up and down to let our dogs out anymore. We have a Rhodesian Ridgeback that is 150 pounds and a Pyrenees poodle mix that is 75 pounds. They can go in and out of the very large Dog door with ease. So far, we have not had any issues with bugs or other animals coming through the door. Seems to have a really strong magnet on the flap. There is a locking mechanism that does fit very snuggly. I always make sure to have the mechanism locked so when the dogs go in and out of the door, it does not dislodge the door for any reason. It seems to be a good price for a good quality door. The only con that I can see is that I cannot find a replacement flap and magnetic parts by that company. I will have to search for generic options for when the flap rips. I would assume with these large dogs eventually it would rip. Easy setup! The only con with the door is occasionally if there’s a really strong wind, the flap does seem to flop open and close occasionally. My cat did try to escape once, but quickly came right back in in fear of the outdoors.
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Reviewed in the United States on February 11, 2026 by Amy R
Color: 81" Sliding Door
Size: Xlarge - 1 Flap
This was super easy to install. It is a lot lighter than I though it would be but is still very sturdy for the material. The instructions in the manual are not completely clear but still easy to follow. They do provide a web address to the YouTube video which made it a lot easier. We LOVE the fact that we can open the door so we can still easily move chairs and other items in and out. The dogs are still not sure about using the door, but they will get used to it. Our original door is really old but this still fit and the door does close and seal really well. Our largest dog is 50lbs and he has already jumped on the glass and licked it and the door held very well, no buckling or bending. The quality of the materials are great. To me they material is the same as most quality storm doors. The only aspect we did not like is the plate that slides over the dog door. You can lock it so that it can not be lifted, which is great. However, the lock is only on one side. This does not hold the panel up very well when it is in the up position. The panel will lean to the side and it falls back in. We just take the panel out and leave it next to the door for when we need it. Leaving it on the door poses a risk of injury to you pet. We do recommend to the seller to add a better locking feature for hold the panel in place. All in all, it is well worth the money for my sanity. My dogs love going in and out for patrol and potty breaks. During spring and fall we just leave the doors open, but for winter and summer, that is not feasible. This door will allow our animals the ability to patrol the house and the yard as they deem necessary.
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Reviewed in the United States on May 20, 2025 by Tammy
Color: 81" Sliding Door
Size: Large - 3 Flap
Let me just say this door will test your patience, the video is NO help. It took us 2 hours to get it together and a lot of cussing. There has to be an easier way, like spring load or something to make it easier to install the frame. After the frame was in, level, screwed into the sliding door frame it was easy putting the rest together. The door itself is nice and looks so much better than the slide in doggy door I previously had. It’s sturdy , the door swings open nicely. There was a small gap but the weatherstripping helped that. The 3 layer flap is stiff which is great and the magnetic strip works really well. My pups had somewhat of a problem opening it but quickly learned to put a little more paw in to it. Over all it’s a great door and worth the money.
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Reviewed in the United States on September 3, 2025 by Angel Beatty
Color: 96" Sliding Door
Size: Large - 1 Flap
This is a fantastic alternative to the old fixed-style pet doors. I’m genuinely impressed by the quality, durability, and ease of installation. For what’s currently available on the market, this exceeded my expectations. The adjustable height was accurate, and the all-metal frame feels sturdy and built to last. Functionality is excellent, and value-wise, it’s a smart investment. The included locking panel works well, and my dog had no trouble learning to use it. That said, there are a few improvements that could really take this to the next level. I’d love to see an option for a handle on either side, allowing easier open/close access whether you’re inside or outside. An adjustable hinge system rather than fixed hinges would also make installation much more forgiving—especially in cases where there’s slight flex in the frame. Even something as simple as spring-loaded hinge points could make alignment easier during install. It would allow the user to compress the frame slightly while fitting it in place, then let the springs help stabilize it as it locks into full position. That would be a game-changer for solo installers. But even with these small areas for improvement, I’m completely happy with this product. It does the job, looks clean, and has held up beautifully.
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Reviewed in the United States on August 3, 2025 by Michelle
Color: 81" Sliding Door
Size: Xlarge - 1 Flap
Not sure who thought having 1 clip to hold the metal panel up was a good idea, but it just doesn't work. One slight bump and the panel tips, making a load noise and it scared one of my dogs so now he doesn't want to use it. The panel was one of the reasons I chose this product. It was easy to install, I did it myself, and it fit my odd sized door frame. I like that it locks and opens full as well. Seems sturdy and the magnetic flap is a nice touch. Weatherstripping is provided to go on the outside of the door, but the adhesive doesn't stick very well. Other than the couple of issues, it's overall a good door.
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Reviewed in the United States on March 10, 2026 by J. Sutcliffe
Color: 81" Sliding Door
Size: Large - 1 Flap
Dog Door arrived well packed with no damage. Assemble was easy, fit good and well made. The only problem was one of the door lock packages had wrong screws in it, too short to work but I had replacements. The door works great and is well sealed. My dog and cats do not like the opaque flap so I'm going to replace it with a clear one like the one they use now.
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Reviewed in the United States on January 31, 2026 by DenSha