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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Extended holiday returns
Returnable until Jan 31, 2026 Learn more
Returnable until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: Returnable until Jan 31, 2026
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
Only 1 left in stock, order soon!
Arrives
Dec 12 – Dec 15
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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
Dog Breed Size: Large
Pet Type: Cat, Dog
Product Dimensions: 3 x 55 x 15 inches
Item Weight: 26 pounds
Manufacturer: Eillion
Item model number: Large Dog Door for Sliding Glass Door
Date First Available: April 22, 2025
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Dec 12 – Dec 15
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
I recently purchased this Sliding Glass Pet Door and it’s been a great addition to our home. The installation was straightforward, the instructions were clear, and the door fits securely in the track of our sliding glass door. I also watched a youtube video they offer to help with the installation. Our pet learned to use it very quickly and now goes in and out without us having to constantly open the door. The flap closes well and helps keep the cold and bugs outside. The materials feel sturdy and well made. I was also impressed with the customer service. The seller was very responsive and helpful with my questions about extra locks for the access door. Overall, I’m very happy with this purchase and would recommend this pet door to other pet owners.
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Reviewed in the United States on November 24, 2025 by Jose Abreu Jose Abreu
Color: 81" Sliding Door
Size: Xlarge-3 Flap
We love this door and it helped us tremendously within minutes of install. With three German Sheps we purchase the x large and it works great, stays shut, does not rattle or shake, or scare my 115 lb long coated king, who is not a fan of windy days. Fit great. Has multiple security options but with three Sheps, I guess I do not worry about that as much. I would not trust it to stop a home invasion without added security. Looks nice. My daughter put it together and installed it without too many complaints. We love it. Dogs love it.
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Reviewed in the United States on November 18, 2025 by Lori Hopkins Cavanagh
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: 81" Sliding Door
Size: Xlarge
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 Tammy
Color: 81.1" Sliding Door
Size: Large
After installing this dog door, theses are my experiences to share and some comparisons with my previous dog door. The pictures describe some of the issues encountered. First, I think this dog door is more substantial than my previous one, it is heavier and the glass feels thicker. Obviously, the major appeal is the ability to open and close the door for human access. The installation is much more permanent (with self tapping wood screws onto the frame) than wedging the dog door in between the sliding door and frame. Second, I encountered some instructional assembly issues. I'm not sure if the hinged glass panel and the hinged dog door were supposed to be installed onto the frame already (that's how they were packaged in the box). The instruction showed every piece unassembled. So it took me a minute to reorient and trace the steps. I still ended up with a few extras screws. I only had 1 option to fit the dog door in my sliding door frame track, which is in the middle of the sliding door track. I would've liked to fit the door in one side of the track or the other, but the door and the gap are both exactly the same width. So I positioned the gap on the bottom of the dog door over the middle track of the sliding door frame. Then, I screwed the dog door frame to the sliding door frame and added some seal strips to wedge the gap on the interior/exterior and top/bottom of the dog door. For now, with this dog door, I opted not to use the dog door lock. It impedes with the metal door when I try to slide it up and down to open and close. When the lock is unlocked, it also impedes with the closure of my glass sliding door. I did not use the regular door lock because I don't want to drill into my sliding door. To "lock" my door, I use a sliding door security bar, aka. a piece of wooden dowel in the door track. The dowel also helped to push the sliding door against the dog door for a better seal. Compare to my previous dog door (which had its own installation issues), I do like this door better. I really do like the ease of locking and unlocking the human door with a simple push of the locks. It took (embarrassingly) a lot longer to assemble and install this door. However, I think I am just more particular about how my sliding door operates with the dog door. I am also more aware of how my dogs sometime rushes out the door and can "abuse" and shift the door. So, I appreciate the long screws in the door frame, and I also spent more time sealing and wedging the gaps to keep the door as stable as possible. I was able to address most of the gaps all along the door. The top of the door is unleveled, but I just need to tinker with it a bit more. It is very irritating that the included seal strips are not great... the only one I think works adequately is the white, flat, rubber-like seal strip along the exterior border of the whole dog door. I think this is a great idea for dogs and humans... however, there are still several issues to work out, e.g., upgrade the seal strips which could solve over 75% of review complaints. The product still needs some reevaluation on the design, e.g., smaller dog door lock, placement of it, or widening the frame by a few cm more. When compared to my other dog door, the metal frame feels more robust and the opening is slightly taller for my huskies. The dog door flap feels heavier and thicker, but I don't think my dogs like the darker gray color... they can't see through it and they think the door is closed... finding the flap replacement may also pose an issue down the road. I wouldvebliked double flaps or something for a better seal and prevent heat/cool air loss. The single flap doesn't really align perfectly with the magnetic strip in the dog frame. Overall, I really like the whole idea of this door. There are good and negative points with this openable dog door. The price point is comparable to the traditional full frame dog door. But, everytime I find a feature I like, there is an issue with the installation, assembly, size, positioning, etc... so it requires substantial personal "customization." In the end, if I had to choose between this and the traditional wall cut out or other full framed sliding dog doors, I think I would pick this product... but it is not quite perfect and requires substantial preparation and time to make this work.
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Reviewed in the United States on January 10, 2025 by GabeGabe GabeGabe
Color: 81" Sliding Door
Size: Large-3 Flap
This is a great purchase. I had it professionally installed and its a sturdy and reliable addition to the sliding doors. The best part is the open swinging feature meaning i dont lose precious door space for humans while accommodating canines. Unit sits flush again original molding and installers managed to make it lock securely too. 5 stars. Highly recommend
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Reviewed in the United States on November 16, 2025 by CZD CZD