Hi all, I inherited with my new house a lovely three piece Barber Wilson kitchen tap in polished brass finish, no longer so polished but looks great. I replaced the cylinder due to dripping cold tap. I now have a new more worrying leak from the base of the riser swan neck. Water is seeping out from where the swan neck fits into the base. My question is do I need to replace the whole swan neck or is there a service part washer etc I can replace ?