The thread part of the tap is firmly secured in the tap body. perhaps i explained wrongly. The tap body sits onto a base plate. The taps have levers that move left to right, so eventually this movement results in the tap body(and thread) moving slightly.• Tap washer repair kit or individual parts. Here’s how. Step 1 . Turn off mains water supply, then turn on tap you are working with and let water run out. It helps if you also turn on a tap that is at a lower level, such as a garden tap. Unscrew button or screw that holds on the handle, remove handle, then unscrew or remove cover plate.