Free U.S. Shipping & Lifetime Warranty For All Endura Flap Pet Doors

  • Restores original seal and flap performance
  • Flexible material stays responsive in changing temperatures
  • Magnetic closure helps guide the flap back into positionIncludes essential components for a complete refresh
  • Compatible with multiple Endura Flap configurations
  • Designed for straightforward replacement

Endura Flap Replacement Flap

Restore Like-New Performance

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Made in the USA USA flag icon
Regular price $79.99 USD

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Lifetime Warranty

Frame Color
Flap Size


A complete replacement flap kit designed to restore seal, swing, and magnetic closure so your Endura Flap performs like it should.

Installation & Fit

  • Fits all Endura Flap pet doors including door mount, wall mount, and compatible glass installations.
  • Mounts using the existing frame and hardware without requiring a full door replacement.
  • Secures with included pivot washers and magnet set to restore proper sealing and alignment.
  • Includes hole plugs matched to original square corner frames or updated 45 degree corner frames.
  • Thermo Panels, Thermo Sashes, and New Pet Door Guys in the Glass installations do not use hole plugs.
  • Wall installations for frames with original square joints require additional wall studs.

Best Suited For

Ideal for:

  • Homeowners whose Endura Flap frame and structure remain in good condition but the flap shows wear over time.
  • Pets that rely on daily access through their Endura Flap pet door and need a properly sealing flap to maintain comfort indoors.
  • Customers looking to extend the life of their existing Endura Flap system rather than replacing the full unit.
  • Owners who want a straightforward parts replacement using their current Endura Flap frame and mounting location.

Not ideal for:

  • Pet doors from other brands or non Endura Flap models, as this replacement flap is designed exclusively for Endura Flap systems.

Questions

What's in the box?

  • 1 Replacement Flap
  • 3 Retainer Rings
  • 8 Hole Plugs*

Is the flap flexible?

It is flexible, but since it is two pieces sandwiched together it is a little stiffer and heavier than the more economical vinyl flaps.

Is the Endura Flap clear?

It is a little foggy, but it is see through.

How long do Endura Flaps typically last?

The lifespan depends on usage and weather exposure, but Endura Flaps are designed to last significantly longer than standard vinyl flaps. Many homeowners only need to replace them after years of heavy use.

Explore all questions
Product Details

Product Details

Over time, daily use and exposure to the elements can affect how a flap performs. A replacement flap restores the original movement, seal, and closure your Endura Flap system was designed to deliver, helping maintain a more consistent barrier between indoors and out.

Built for Everyday Use
Each flap is formed from a flexible polyolefin-based polymer selected for durability and resilience. It remains responsive across temperature changes rather than becoming stiff, allowing pets to move through comfortably while still supporting proper closure after each use.

Magnets work in combination with the flap to guide it back into position, helping maintain a more reliable seal against wind and airflow. Replacing the flap helps restore that alignment and overall performance.

Complete Kit for a Clean Refresh
Each kit includes the core components needed to return the flap to proper working condition, including pivot washers and a magnet set. Hole plugs are also included to match both original square corner frames and updated 45 degree corner frames for a consistent finished look.

Thermo Panels, Thermo Sashes, and new Pet Door Guys in-glass installations do not require hole plugs.

Wall mount pet doors with original square corner joints require threaded wall studs.

Straightforward Replacement
Full instructions are available for each Endura Flap configuration, guiding a clean replacement process and helping ensure proper alignment once installed.

Sizing & Fit

Size Chart

Flap SizeFlap Dimension
Small6" w x 11" h
Medium8 " w x 15" h
Large10" w x 19" h
Extra Large12" w x 23" h
XX Large14" w x 27" h

Flap rods are purchased separately: Stock No. 19PPRod

Installation Guide

Installation Information

Original Endura: Door Mount, Wall Mount & Vinyl Panel

Installation icon Difficulty Easy
Installation icon Steps 9
Installation icon Time Required 0.5 hours

Parts

  • 1 Replacement Flap
  • 3 Retainer Rings
  • 8 Hole Plugs*

Tools

  • Magnetic Phillips head #2 screwdriver
  • Flat head screwdriver
  • Drill

*Replacement flaps come with two sets of hole plugs, but you will only need to use one on your flap. For your door, use the set of 8 large hole plugs and discard the set of 4 smaller hole plugs.

Step 1 Remove the Hole Plugs

Remove the Hole Plugs
  • First remove the Endura Flap from the door or wall.
  • To do this, you will need to remove the hole plugs. Don't worry, we sent you some extra ones!
  • You can drill a hole in each plug and wiggle the plug out with a screwdriver to pull them off.

Step 2 Unscrew the Frame

Unscrew the Frame
  • Use the Phillips head screwdriver to remove the screws that were under the hole plugs from the frame then remove the entire flap assembly from the door or wall.
  • Carefully bend the tabs holding the tunnel together upwards until horizontal, then remove the long side pieces of the tunnel by sliding them off of the flattened tabs.
  • You can use the flathead screwdriver to get it started. Careful! The tabs may snap off if bent too much.

Step 3 Remove Retainer Ring

Remove Retainer Ring
Remove Retainer Ring
Remove Retainer Ring
Remove Retainer Ring
  • Look for a metal rod at the top of the flap frame—remove one of the circular metal retaining rings by forcing it off with a flathead screwdriver.
  • Your pet door model may not require retainer rings for the flap rod. If so, you can skip this step.
  • Note that you will only need to remove one retainer ring to slide the rod out.

Step 4 Remove Flap from Frame

Remove Flap from Frame
  • Push the metal rod through the flap frame until it comes out on the other side.
  • Pull the rod out and remove the flap.

Step 5 Loosen the Bellows

Loosen the Bellows
  • Position the new flap in place in the frame and make sure the magnets are attracting correctly. If they are not, try flipping the flap around (switching the interior and exterior faces).
  • Sometimes the bellows (accordion-like sides of the flap) contract during shipping and prevent the magnets from attracting. To fix this, remove the pivot washers from the top corners of the flap and use a blow dryer to lightly heat the bellows and stretch them back out.

Step 6 Check Magnet Orientation

Check Magnet Orientation
Check Magnet Orientation
Check Magnet Orientation
  • Before installing your new flap you should check to make sure that the magnets in the flap and the frame are attracting correctly.
  • If they seem to be repelling, you probably need to flip the flap around so they work properly.

Step 7 Reinstall Flap

Reinstall Flap
Reinstall Flap
Reinstall Flap
  • Guide the metal rod back through the flap and frame.

Step 8 Install Retainer Ring

Install Retainer Ring
Install Retainer Ring
Install Retainer Ring
  • Push a new retainer ring on by holding the other side of the rod in place while pushing the ring on with your fingers.
  • Each side only needs one ring, and the teeth need to be bent facing away from the flap. If you’re having difficulties putting the new ring on, try flipping the ring around so the teeth are facing the opposite direction.

Step 9 Re-Install the Pet Door

Re-Install the Pet Door
Re-Install the Pet Door
Re-Install the Pet Door
  • Reinstall the flap assembly into the door, wall, or panel. Line the holes up so you can see light through them, then screw them into place.
  • Do not overtighten.
  • Install the new hole plugs using a rubber mallet or another non-metal tool such as a hammer and wood.
  • Use the set of 8 large hole plugs only. Discard the set of 4 smaller hole plugs.

Thermo Panel & Window

Installation icon Difficulty Easy
Installation icon Steps 13
Installation icon Time Required 0.5 hours

Parts

  • 1 Replacement Flap
  • 3 Retainer Rings

Tools

  • Magnetic Phillips head #2 screwdriver
  • Flat head screwdriver

Replacement flap kits may include parts not required for your specific pet door model, including screw caps or covers. Please discard any parts your pet door does not use.

Step 1 Position the Panel

Position the Panel
  • Lay the panel down on its edge, so that you can see the screw holes that are on the sides of the panel.

Step 2 Remove the Bottom Screws

Remove the Bottom Screws
  • Remove the two screws nearest to the bottom of the panel on both sides.

Step 3 Loosen Middle Frame Screws

Loosen Middle Frame Screws
  • Locate the second set of screws, right under the glass on either side.
  • Loosen each screw a quarter turn.

Step 4 Remove the Pet Door Frame

Remove the Pet Door Frame
  • Slide the flap assembly out of the bottom of the panel.
  • ou may need a soft mallet to knock it loose. If so, it’s easiest to rotate the flap out and tap the bottom magnetic threshold with the mallet.

Step 5 Remove Retainer Ring

Remove Retainer Ring
Remove Retainer Ring
Remove Retainer Ring
Remove Retainer Ring
  • Look for a metal rod at the top of the flap frame—remove one of the circular metal retaining rings by forcing it off with a flathead screwdriver.
  • Your pet door model may not require retainer rings for the flap rod. If so, you can skip this step.
  • Note that you will only need to remove one retainer ring to slide the rod out.

Step 6 Remove Flap from Frame

Remove Flap from Frame
  • Push the metal rod through the flap frame until it comes out on the other side.
  • Pull the rod out and remove the flap.

Step 7 Loosen the Bellows

Loosen the Bellows
  • Position the new flap in place in the frame and make sure the magnets are attracting correctly. If they are not, try flipping the flap around (switching the interior and exterior faces).
  • Sometimes the bellows (accordion-like sides of the flap) contract during shipping and prevent the magnets from attracting. To fix this, remove the pivot washers from the top corners of the flap and use a blow dryer to lightly heat the bellows and stretch them back out.

Step 8 Check Magnet Orientation

Check Magnet Orientation
Check Magnet Orientation
Check Magnet Orientation
  • Before installing your new flap you should check to make sure that the magnets in the flap and the frame are attracting correctly.
  • If they seem to be repelling, you probably need to flip the flap around so they work properly.

Step 9 Reinstall Flap

Reinstall Flap
Reinstall Flap
Reinstall Flap
  • Guide the metal rod back through the flap and frame.

Step 10 Install Retainer Ring

Install Retainer Ring
Install Retainer Ring
Install Retainer Ring
  • Push a new retainer ring on by holding the other side of the rod in place while pushing the ring on with your fingers.
  • Each side only needs one ring, and the teeth need to be bent facing away from the flap. If you’re having difficulties putting the new ring on, try flipping the ring around so the teeth are facing the opposite direction.

Step 11 Reinstall Flap Assembly

Reinstall Flap Assembly
  • Slide the flap assembly back in place in the bottom of the panel.
  • Be sure that the tracks for the locking cover are on the same side as the height adjustment locks at the top of the panel.

Step 12 Attach Bottom Piece

Attach Bottom Piece
  • Screw in the bottom piece with the two screws that you removed.

Step 13 Retighten Middle Frame Screws

Retighten Middle Frame Screws
  • Tighten the screws that are under the glass.

Thermo Sash Window Panel

Installation icon Difficulty Easy
Installation icon Steps 11
Installation icon Time Required 0.5 hours

Parts

  • 1 Replacement Flap
  • 3 Retainer Rings

Tools

  • Magnetic Phillips head #2 screwdriver
  • Flat head screwdriver

Replacement flap kits may include parts not required for your specific pet door model, including screw caps or covers. Please discard any parts your pet door does not use.

Step 1 Position the Frame

Position the Frame
  • Lay the sash panel down on its side so that you can see the screw holes on the sides by the flap.

Step 2 Remove Screws

Remove Screws
  • Remove the two screws nearest to the side of the flap on both the top and bottom using the Phillips head screwdriver and the electric drill.

Step 3 Remove Side Piece

Remove Side Piece
  • Slide out the side piece so that you can access the rod at the top of the flap.

Step 4 Remove Retainer Ring

Remove Retainer Ring
Remove Retainer Ring
Remove Retainer Ring
Remove Retainer Ring
  • Look for a metal rod at the top of the flap frame—remove one of the circular metal retaining rings by forcing it off with a flathead screwdriver.
  • Your pet door model may not require retainer rings for the flap rod. If so, you can skip this step.
  • Note that you will only need to remove one retainer ring to slide the rod out.

Step 5 Remove Flap from Frame

Remove Flap from Frame
  • Push the metal rod through the flap frame until it comes out on the other side.
  • Pull the rod out and remove the flap.

Step 6 Loosen the Bellows

Loosen the Bellows
  • Position the new flap in place in the frame and make sure the magnets are attracting correctly. If they are not, try flipping the flap around (switching the interior and exterior faces).
  • Sometimes the bellows (accordion-like sides of the flap) contract during shipping and prevent the magnets from attracting. To fix this, remove the pivot washers from the top corners of the flap and use a blow dryer to lightly heat the bellows and stretch them back out.

Step 7 Check Magnet Orientation

Check Magnet Orientation
Check Magnet Orientation
Check Magnet Orientation
  • Before installing your new flap you should check to make sure that the magnets in the flap and the frame are attracting correctly.
  • If they seem to be repelling, you probably need to flip the flap around so they work properly.

Step 8 Reinstall Flap

Reinstall Flap
Reinstall Flap
Reinstall Flap
  • Guide the metal rod back through the flap and frame.

Step 9 Install Retainer Ring

Install Retainer Ring
Install Retainer Ring
Install Retainer Ring
  • Push a new retainer ring on by holding the other side of the rod in place while pushing the ring on with your fingers.
  • Each side only needs one ring, and the teeth need to be bent facing away from the flap. If you’re having difficulties putting the new ring on, try flipping the ring around so the teeth are facing the opposite direction.

Step 10 Re-Install Flap Assembly

Re-Install Flap Assembly
  • If you removed the entire flap and frame assembly and one of the retainer rings, install a new retainer ring with the teeth pointing out away from the flap and slide the entire assembly back into place.
  • Be sure that the tracks for the locking cover are on the same side as the width adjustment locks at the other end.

Step 11 Re-Install Side Piece

Re-Install Side Piece
  • Screw the side piece that holds the flap assembly back in place with the two screws that you removed. If you loosened screws in the middle to remove the flap frame, tighten them back down.
FAQs

FAQ

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