I recently disconnected the bath tap mixer ( two taps ,one spout) to fit a new mixer - which wasnt suitable as it happens- so I reconnected the old one. However no matter how much I tighten up the nuts they are still leaking from under the nut. I used a tap spanner in a very confined space. It is driving me mad as the leak has caused part of the celing to come down! Any ideas PLEASE! - Trevor