Step 1. Washers
Step 2. Replacing The Washer
1. Firstly make sure to turn off your water main in the house. Your water main will either be out on the street or in your front yard if you live in a house. If you live in a flat or townhouse the mains tap will probably be inside the bathroom or laundry.
2. Open the tap to release any water left in the pipe.
3. Place the plug in the basin to prevent any tap parts from disappearing into the drain.
4. Remove the tap's cover with a screwdriver on the handle to expose the screw. The screw is most likely under the hot or cold sign. Some taps will have screws positioned on the side.
5. Undo the screw and remove the handle.
6. If the tap is shrouded with a metal cover, unscrew by hand or use a wrench. Make sure to use a cloth over the cover to protect the chrome from scratching.
7. Use a spanner or wrench to unscrew the tap bonnet. Completely take out the headgear, you should now see the large body washer, the o-ring and the jumper valve.
8. The jumper valve will just fall out.
9. Replace the body washer, the o-ring and the jumper valve then refit bonnet & spindle - make sure not to over tighten the nuts.
10. Re-assemble the tap, close it and then open the water main.
11. Check that the leaking has ceased.