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5mm
When using power tools, please follow all safety instructions provided with the
product.
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Now mark your cutting line 5mm (3/ 1 6") inside the line you
just traced. Once complete, rub out the original traced line
if you can so that you don't get confused.
Now it's time to prepare for cutting. We strongly advise that
you drill large holes in all the corners of the outline to make
it easier to cut the hole with a jigsaw. Make sure these holes
are touching the line and that they are big enough for the
blade of the jigsaw to fit through.
Using a jigsaw, cut around the inner edge of the line you have
marked. Once the hole is cut, to select the correct length of
screw from the sets provided, you need to compare the screw
lengths to the thickness of your door. The screw length needs
to be between 20 to 35mm (25/ 3 2 to 2 3/ 8 ") longer than the
thickness of your door.
Apply a line of clear all-weather sealant to the back of both
mounting adaptors, about 15mm (9/ 1 6") from the edge. Make
sure your Cat Flap is nearby and ready to be fitted. Place one
of the mounting adaptors (it doesn't matter which) over the
tunnel of the Cat Flap so that the patterned side with the ribs
is facing outwards and is not touching any surfaces.
We advise that there are two people present for this step;
one person inside the house and one outside. From inside
the house, put the tunnel through the hole in the door.
Remember the SureFlap logo must be inside the house.
From the outside of the house, check that the tunnel is in
the centre of the hole and not resting on the edge of the
hole, then take the second mounting adaptor and side it over
the tunnel with the sealant facing the door. You may need the
person inside the house to keep pressure on the Cat Flap to
make sure it stays in place.
Next, slide the external frame over the tunnel. The person on
the inside of the house should keep pressure on the Cat Flap
and hold it so that the tunnel is in the centre of the hole.
Using a cross head screwdriver and the length of screw you'd
chosen, secure the external frame in place. Fasten the first
screw until it is secure, but not too tight, then do the same
to the last one. Once all the screws are secure, tighten them.
Now, insert the two screw caps into the external frame.
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