If your Tap is dripping at the base of the Spout i.e where it is fixed into the body of the tap, then you either need to replace the O Rings (1425R) or if you have a Pin hole in your Spout or its cracked, damaged etc, you can replace the entire Spout.
Your spout has the 1425R O Ring Kit. This O Ring Kit was updated to include a smaller white ptfe ring. This was added in later years for additional stability so your own spout, if older 3218R (earlier) will not include this additional small white ptfe ring. The other rings are unchanged. You can still fit the current (improved) spout, now called 3926R to your own Tap that has earlier 3218R spout.
DIY : Here is our Guide : How to change your Kitchen Tap Spout.
Please ensure that you select the correct finish. All our Spouts come complete with O Rings and Aerator / Perlator included. If you don’t know which spout you require, Contact us for assistance or email pictures to firstname.lastname@example.org