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UPVC Door Handles Replacement Guide Replacing the handles on your doors made of upvc is a straightforward DIY project once you have the correct measurements. These measurements include the distance from the handle's backplate mounting centres (sometimes called PZ) to the centre of keyhole. The most commonly used type of uPVC door handle comes with two inline levers one internal and one external that is connected via a spindle. They are used to operate the multi-point lock found in uPVC aluminum, uPVC and a
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