Pet Door Spring Kit

(3 customer reviews)

The Small set provides the necessary single spring.

Choose your Size from the following:

The Small set provides the necessary single spring.



The Small set provides the necessary single spring.

Sizes Medium, Large, and Extra Large provide the necessary pair of springs.

  • Make sure to apply non corrosive grease to the springs.
  • Do NOT use WD40.
  • The Small set provides the necessary single spring.
  • Sizes Medium, Large, and Extra Large provide the necessary pair of springs.


3 reviews for Pet Door Spring Kit

  1. Gary Sciascia

    I bought my large bite guard tinted in wall dog doors in 2012. Until 2019 I didn’t do anything to the doors. 2 Malinois and Doberman SLAM their way through these doors countless times a day for 7 years with no problems.
    Had I known to look at the paperwork that came with the doors I would have known to clean and lube the springs every couple of years and I wouldn’t have to replace the springs in 2019. Still the doors are expensive but the frame and
    the door panels themselves show absolutely no signs of wear over 7 years. worth every penny. Get what you pay for. If I had normal dogs this level of quality and sturdiness of construction might not be necessary. After replacing
    several other doors that couldn’t withstand the abuse my dogs give I was finally glad to find doors that need no attention but occasional cleaning and as I know now, spring lube. BTW, the spring replacement or lubing takes 20 minutes tops.
    even less after you do it once or twice. Great product.

  2. Paul Boivin

    I have have had my large door for about twenty years and it has survived – for the most part – 2 big dogs pounding it each day. Just last year I had to replace a sealer and today I am ordering a spring kit.

  3. Cody Dillman

    I’m stressing to think you make these things to break just so I keep buying more. I replace these damn things twice a year at least! You’re taking advantage of customers. I’m just glad I’m getting a different dog door that isn’t made with worthless components that take advantage of your buyers.

    • Bill Zahn

      Thank you for letting us know your springs are not lasting as long as they should. Please remember you have a 10 year warranty and the spring are covered
      We have been tracking the premature spring failure, and have noticed this issue. Now we are looking at different designs of springs. Also, we are
      working with the spring manufacturer to see if the last batch ordered had the correct heat treatment with the correct gauge wire. We believe this issue is batch related, but each new batch is being tested by production.
      Our XL spring design has been in place since 2008, and only in the past yr we have found that the xl spring has been breaking quicker then normal. The normal life of our XL spring should be +- 3 to 5 years depending on the number of dogs using the door. Our Plexidor has been around since 1985 and we take great pride in offering the very best Dog door you can buy … so please remember we will find an answer to any problem Please call us if you have any questions 941-758-1951

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Size Chart

Refer to the PlexiDor Size Chart shown below to determine the size pet door you require. Once you know the correct size for your pet, be sure to review the installation information. If you have any questions please call 1-800-749-9609 FREE for assistance.

Need a printout?

To view the complete chart, please access this page with a larger device or download the PDF.

Size Chart Header
Breed Size
Type of
for Pet
Cut Hole
Up to
9 lbs (Dog)
24 lbs (Cat)
Cats, Chihuhuas, Pomeranians, Papillons, Yorkies, maltese and Japanese Chins
Door Series
Wall Series
6 1/2" x 7 1/4"
8 3/4" x 8 5/8"
8 3/8" x 9 5/8"†
9 7/8" x 9 7/8" (Door Series)
10 3/8" x 11 7/8" (Wall Series)
Up to
40 lbs
Poodles, Corgis, Dachshunds, Beagles, Pekingese, Shelties, Schnauzers, Cocker Spaniels and most Terriers
Door Series
Wall Series
9" x12"
11 1/2" x 13 5/8"
11 7/8" x 14 3/4"†
13 3/4" x 15 1/4" (Door Series)
14 3/8" x 17 3/8" (Wall Series)
Up to
100 lbs
Labradors, German Shepherds, Golden Retrievers, Boxers, Collies, Setters, Bulldogs, Pointers and Dobermans
Door Series
Wall Series
11 3/4" x 16"
14 1/4" x 17 5/8"
14 3/8" x 18 3/8"
16 1/2" x 19 1/4" (Door Series)
16 1/2" x 20 1/2" (Wall Series)
Extra LargeXL
Up to
220 lbs
Great Danes, St. Bernards, Rottweiler, Old English Sheepdogs, Newfoundlands, Irish Wolfhounds and Great Pyrenees
Door Series
Wall Series
15 3/4" x 23 5/8"
15 1/4" x 23 5/8"
18 1/8" x 25 1/4"
18 1/2" x 26 1/4"†
20 1/2" x 26 3/4" (Door Series)
21 1/8" x 28 7/8" (Wall Series)
Up to
125 lbs
Large breed examples as listed including Malamutes, Weimaraners, Rhodesian Ridgebacks and all Cats
Door Series
Wall Series
12 5/8" x 19 5/8"
14 1/4" x 21 3/8"
14 1/4" x 23"†
17 1/8" x 54 5/8" (Door Series)
17 1/8" x 54 5/8" (Wall Series)

† Note: There are two dimensions for the Wall Series cut hole, interior and exterior. Read the installation instructions carefully before cutting.
‡ Dimensions listed in chart are Width by Height.



PlexiDor offers three elegant colors to compliment the decor' of your home.

Choose from White, Silver or Bronze. Silver frames feature an anodized finish. White and Bronze frames feature a baked-on powder coating for increased durability, similar to the appliances in your home. A PlexiDor Pet Door is by far the most attractive pet door you will ever install in your home.

Our finishes will integrate perfectly into your home!

  • The white finish highlights common household appliances as well as most baseboards and trims and blends with most traditional decors.
  • The silver finish coordinates with newer stainless-steel appliances and looks great in a modern setting.
  • The bronze finish works well with darker toned furniture and accessories by adding an updated feel to the room.

A baked-on powder coated finish is far more durable than conventional paint. Powder coated surfaces are more resistant to chipping,  scratching, fading, and wearing than other finishes.

Energy Efficiency

Energy Efficiency door 1 Installing a PlexiDor keeps the heating and cooling inside your home!
Opens fast, closes tight!
Energy Efficiency door 2
Energy Efficiency door
Opening a Standard sized household door allows energy to escape
Energy Efficiency door

Installing a PlexiDor Performance Pet Door into your home could save you as much as 10% off your energy bill.

Each time you open the door to let your dog out, your
HEATING and COOLING escapes.

Review the chart below to determine your estimated annual savings.

Your Average Monthly Energy Bill: Annual Amount Spent 5 Year Total 5% Savings 7% Savings 10% Savings
$100 $1,200 $6,000 $300 $400 $600
$150 $1,800 $9,000 $450 $630 $900
$200 $2,400 $12,000 $600 $840 $1,200

Saving 10% per month could save you $900 in just 5 years.

Above estimates are based on average seasonal temperatures and household temperature settings. Results are typical of PlexiDor owners and are based on more than 25 years of customer feedback. Individual results may vary based on household insulation, age and size of home.


Safety for you and your pet is our highest priority. Each door comes with a lock and key and a steel plate that can be easily attached on for extra security.

Lock and Key
All models come with a lock and two keys for everyday use. Just turn the key to lock out unwanted guests. Heavy duty steel lock visible only from the inside resists tampering. The small size door has a four-way lock that can be set to open, locked, open for entry, and open for exit.

Steel Security Plate
Medium and large size PlexiDor dog doors include a steel security plate that screws on easily when you leave for an extended period of time. To use the security plate daily, install the optional PlexiDor Sliding Track – so the door can be conveniently dropped into place and closed with a flip lock in seconds. Small size doors are too small for an intruder to enter and do not come with the steel security door.


Installing your PlexiDor Pet Door at the correct height will ensure the door is comfortable for your pet to use. Stepping up and through the door is best.
Bottom edge of frame profile_sm profile_m profile_l profile_xl
to floor
Extra large
These measurements are a guide only, make sure the pet door is installed so that the opening is at least 2″ above the pet’s back. There is only one size for electronic doors, you will need to estimate based on pet size.

Full Measurements

IMPORTANT: Install the dog door so that the finished dog opening height is approximately two inches (2”) taller than the dog’s back.

PlexiDor Installation Articles & Videos

Check out the Learning Center Installation Page for more.


Suzanne & Cinnamon: Installation

Installing dog door in wall


Can I install a pet door through a wall?


PlexiDor as Installed on This Old House

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