SureFlap Tunnel Extender for Microchip Cat Flap & DualScan Cat Flap

SKU# 04SF01

  • Tunnel liner for the SureFlap Microchip Dual Scan and Cat Door
  • Each liner adds 2" to the framing range of the door
  • Available in brown or white

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Stock No: 04SF01

Availability: In stock

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SureFlap Tunnel Extender for Microchip Cat Flap & DualScan Cat Flap
SureFlap Tunnel Section for Cat size flaps

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  • Tunnel liner for the SureFlap Microchip Dual Scan and Cat Door
  • Each liner adds 2" to the framing range of the door
  • Available in brown or white
Flap SizeFlap DimensionRough Cut OutOutside
Stock No
Cat Flap5 3/4" w x 4 3/4" h6 1/4" w x 6 1/2" h8 1/4" x 8 1/4"04SF01

The SureFlap Tunnel Extender fits the Sureflap Microchip Cat Flap and Dual Scan models. It is used to allow SureFlap installation in walls. Each extender adds 2" to the original self-framing depth of the Cat Flap or Dual Scan.

Enough tunnel extensions should be purchased to reach the thickness of the wall but no more. The Micro-Chip Cat Door and the DualScan and Cat Door are both "self-framing" to 2-3/4" and will provide the additional depth. In addition, it will slide shut on the tunnel sections to provide a snug seal.

Customer Reviews

Set Direction
  • perfect fit review by Robert
    5 5 perfect fit

    These tunnel pieces were a perfect fit to my DualScan Cat Flap, which I love. It made for a clean installation through my wall.

    (Posted on 12/21/2017)

  • Works well review by Emily
    5 5 Works well

    I needed about a 4" extension and ended up getting 2 of these extensions and it worked out well. Super easy to install and now my cat can get out whenever he wants. Win-win!

    (Posted on 12/13/2017)

  • Order enough! review by catsmeow
    5 5 Order enough!

    Really need to measure your wall before ordering. Not a fun experience if you fall short and have a hole in your wall for a week while you wait for another one. Otherwise the product is great!

    (Posted on 12/8/2017)

  • Easy to put together review by Alex
    5 5 Easy to put together

    These were perfect for installing the SureFlap I bought already through my wall. The pieces just clicked together, and the thickness of my wall worked out so I didn't even have to cut any of the tunnel. Easy solution!

    (Posted on 10/11/2016)

Weight 20.0000
Manufacturer SureFlap
Fit SureFlap MicroChip Cat Flap

1. Make a line on the wall for the cut out that is 6-11/16” wide by 6-11/16” high.

Tip: In order for your pet to be able to fit through comfortably generally the bottom of the cut out should be no more than 3” - 4” from the floor.

2. Double check that there is no electrical, framing, pipes, etc. in the location you are installing the door before cutting.

3. Using the appropriate tools for the job (this depends on the material you are cutting through and if you are unsure then consult a licensed contractor).

Tip: The manufacturer states that you can make a very slight gradual slope towards the outside to insure when installed any water gathering in the tunnel with drain out.

4. Take the tunnel extenders and apply super glue to the corner tabs, then fit them all together. Once the glue dries use weatherproof tape around the outside of the tunnels.

Tip: Do Not glue the tunnels to the pet door.

5. Take one side of the mounting adapter and drill the 4 holes in it using a .15” drill bit. The holes are going to be what holds the flaps to the inside of the house. You can put the screws on the two sides and the top and bottom.

6. Now you can get the cat flap and using the washer screw and shortest screws provided with the door mount the pet door to the adapter.

7. Fit the cat door and adapter through the cut out.

8. Take a pen and mark the four holes you made through the adapter. You should also remove a little material from the wall in order to recess the screw and washer to make it flush to the wall. Remove the door and adapter.

9. Now drill the holes in your wall with the appropriate drill bit for the screw you chose and material of your wall.

10. Now tape the tunnels to your cat door using the same weatherproof tape as in step 4.

11. Mount the cat door with the tunnels and adapter in the wall from the inside and screw it into place through the holes in the adapter.

12. You will see the tunnel sticking out of the wall from the outside, so take the outside frame and second adapter and fit it over the tunnels and against the external wall.

13. Make a mark for the screw holes, then remove the frame and adapter and drill the holes out.

14. Now fit the outside mounting adapter over the tunnel, then the outside frame over the tunnel against the adapter and screw them to the wall.

15. Use some small screws to drill through the top of the tunnel sections and into the frame to secure it.

16. Use a silicone sealant to seal anything that has the potential to get water in it that would leak into the wall.


Click below to expand:

Each liner adds 2 inches to the tunnel length. The original door is 2 3/4" thick.

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Sureflap Guarantee

Guarantee - SureFlap microchip cat flaps carry a 2-year guarantee from the date of purchase, subject to proof of purchase date. The guarantee is restricted to any fault caused by defective materials, components or manufacture. This guarantee does not apply to products whose defect has been caused by normal wear and tear, misuse, neglect or intentional damage.

In the event of a part failure due to faulty parts or workmanship, the part will be replaced free of charge during the guarantee period only. At the manufacturer's discretion, a replacement product may be provided free of charge in the case of a more serious malfunction. Your statutory rights are not affected.

Disclaimer: The SureFlap microchip cat flap incorporates selective entry features which have been designed to minimize the risk of unwanted animals entering your home. However, it is not possible to fully guarantee the exclusion of all other animals in all circumstances.

In the rare event of an unwanted animal gaining access to your home, SureFlap cannot accept liability for any damage or inconvenience which may be incurred.

Warning:  The motorized catch and manual lock are provided exclusively to prevent the entry of unwanted animals and is not a security device. SureFlap Ltd cannot accept liability for unintended use and the owner of the product accepts full responsibility for supervising the access in and out of the home that it provides.

In households with children, it is essential to include the cat flap in child-proofing considerations. Misuse of the cat flap by a child may result in the child coming into contact with potential dangers. For this reason, young children should be monitored at all times when in the immediate vicinity of the cat flap.

Caution:  Prior to installation, it is the responsibility of the user to consult all building codes which may influence the fitting of the cat flap and assess the suitability of a given installation. The user must also consider potential hazards present inside or outside the cat flap as well as the impact that subsequent modifications to your property may have on the existence and use of your cat flap. It is recommended that these assessments are conducted in consultation with a construction professional.

Do not install SureFlap in a fire door as it will render the fire door unfit for purpose.