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UPVC Door Handles Replacement Guide Replacing upvc door handles is a straightforward DIY project once you have the proper measurements. These measurements include the distance from the backplate's mounting centres (sometimes called PZ) to the center of the keyhole. The most commonly used type of uPVC door handle is one with two levers inline both internal and external that is connected via spindle. They operate the multipoint lock found on uPVC and aluminium doors along with some wooden ones. Brands finishes A damaged uPVC handle could