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UPVC Door Handles Replacement Guide Once you have the right measurements, replacing upvc door handles is a simple DIY project. These measurements include the distance from the backplate's mounting centres (sometimes called PZ) to the centre of keyhole. The most common uPVC handle is made up of two inline levers. and one exterior, connected by a spindle. They are used to operate the multipoint lock found on uPVC and aluminium doors, as well as some wooden ones. Brands Finishes A broken uPVC handle i