General Information About Pet Door Replacement Flaps

If you need a replacement flap, locking cover or other part for your pet door it is vital that you order the correct brand. Brands are not interchangeable even if the dimensions seem to match.  Use the flap dimension to select the correct size within the brand only after the brand has been established. 

Please note that the flap size measurement--the opening actually available to the pet-- is usually a little smaller than the complete flap dimension as there will usually be space at the top of the flap to attach it to the pet door frame. Also, if you have the correct brand, don't worry about the dimensions being slightly off. It's common for customers and us to measure slightly differently.

If you know the brand or trade name, please select it from the groups below. These links will take you directly to the appropriate location in our secure on-line store where you can place an order. One section may offer multiple sizes. Some manufacturers have been quite prolific in their use of trade names while others have been more restrained. However, each group refers to just one line of flaps only in the array of sizes shown.

If you're not sure of the brand - Check the "Details" pages for identifying information that may help you to be sure.

Hot Tip:  Do you find yourself replacing your flaps too often? Here's an example of a leaky flap problem. Consider a 'high performance' pet door based upon the new 'Endura' flap. You'll never need another one and it's still flexible and safe. View the Endura Flap Story or visit the complete product line.

Replacement Collar Keys

Replacement Tunnel Sections

Additional Notes:
'Instant' Pet Door -flaps were mostly a thin, grey flexible material but some were made with clear vinyl. Sizes included 7" x 13", 11" x 13", 11" x 20", 8" x 11" and 12" x 18". They are no longer available.

Sergeant Pet Doors - Flaps were clear, flexible vinyl. Size information not available. They are no longer available.

If you are unable to identify the brand from the information given, don't give up!  Call our customer support staff during  regular business hours.  Be sure to be close to the pet door so you can answer our questions. Chances are we can identify the pet door and that we will have the flap or parts that you need.

Important note:  When measuring flap size, please measure the opening available to the pet and nothing else! It is very easy to mistake, for example, a medium for a large if you measure the pet door frame instead of the flap dimension.  If your flap has two parts--a center flap and a u-shaped gasket piece--the flap opening is smaller in one direction than the other.  Measure the smaller dimension in that case.