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Replacement Flap For Chubby Kat/Hefty Kat - Door


Product Description

Large Size Chubby Kat 7-1/2" X 10-1/2" FLAP Has Solid LEXAN™ Plastic Flap/Plastic Frame. Also Fits Hefty Kat and Medium Pet Flap Models.

How to Measure Your Ideal Pet

To determine the correct size door simply measure the width (A) and height (B) of your pet. 

(A) Measure the widest point of your pets shoulder 

(B) Measure from the top of your pets back (just behind his head) to the bottom of chest.

Alum pet patio Door
vinyl pet patio Door

Product Reviews

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Showing reviews 1-10 of 18 | Next

  1. Great Product, Great Service 5 Star Review

    Posted by on 6th Jan 2023

    I ordered the replacement door and inside frame. When I installed it, one of the screws wouldn't go in and it seemed to have more room on the left and right "brush" sides. I called and told them about it. I was told that I would received a replacement, with the caveat that it is not weatherproof. The parts arrived in just a few days and when I installed them, it was just like the other one - nestled up tightly against the edges of the door. Not weatherproof, but it sure helped keep the wind and the rain out when Houston got our big blast of frozen air!

  2. Cat door 5 Star Review

    Posted by on 13th Mar 2022

    The best, easy to install, no drills, no holes, never have to worry about closing the window or about being worry because the door locked by accident. It’s a dog door even if I have only cats, the one fie cats are to small for a couple of my chooby cats.

  3. EASY INSTALLATION 5 Star Review

    Posted by on 14th Mar 2021

    such a great new door and works like a charm
    easy to install

  4. My dog loves it. 5 Star Review

    Posted by on 30th Nov 2019

    We have had our Chubby cat door for over a decade. The flap part had dulled and yellowed over the years but the frame and side windows were in great shape.

    It was fairly easy to replace. I would have felt less stressed if you had included some directions or a link to a video. That said, I figured it out and it looks nice and works perfectly!

  5. Chubby Kat Door Replacement 5 Star Review

    Posted by on 29th Jul 2019

    I was very happy to see that my chubby Kat door was still available! After close to eighteen years the door finally yellowed and cracked. And with a small excited dog running thur it didn't help!? Replacement was easy. Glad I purchased this product has it has been a good investment for the money.

  6. Nice to have replacement parts 5 Star Review

    Posted by on 14th Sep 2018

    I think it is great the company provides replacement parts. The door looks and functions like the original. And, I don't have to put a perfectly good pet door in the landfill.

  7. Quality Product 4 Star Review

    Posted by on 13th Jul 2018

    Quality product. Received quickly and as ordered. A little pricey but this is well made product.


    Posted by on 14th Jun 2018


  9. Pet Door Sash Flap 5 Star Review

    Posted by on 11th Jan 2018

    I had to replace the sash flap on my cat door because my 6 cats wore it out. I got the new one and thanks to a video on the website I was able to take the old one off and put the new one on in less than five minutes. Very high quality product.

  10. Perfect fit 5 Star Review

    Posted by on 27th Dec 2017

    Got a new flap because our cats ripped the fringe off the old flap. (NO fault of the manufacturer ) Didn't come with instructions on how to replace, but YouTube had a great video that helped us out. The new flap is installed and working great.

Showing reviews 1-10 of 18 | Next