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Installing a pet flap on your French or patio doors is a great option if you have pets such as a cat or dog. It allows them to get in and out without you having to open the door. There are a variety of cat flaps available to fit uPVC wooden or composite doors. Some come with a 4-way locking system that can be set to allow exit only or in-only. Installation Cat flaps can be a great way to let your cat in and out of the house without hav