please can you tell me if this is ok to do i brought an italian vanity unit with a basin and mixer tap with pop up waste . i took out the pop up waste and used a whole new british waste not pop up . under the sink it wont stop dripping is it the wrong waste i put in. its the same mixer tap just a new waste system not pop up. help please. i used plumbers mait. lots of. still wont stop dripping. do i have to use the same as they sent me. it seem to fit is it to do with under the plug do you think it seems to fit. i cant think where the drips comeing from i used a torch to check it. mr purton fed up