I have a jacuzzi bathtub, about 15 years old, water slowly leaks down the drain - local plumber says I need a new washer but local stores no longer stock the size I need. The drain is the type with a fixed metal twist down lock. Any suggestions to stop "leakage" - I'm an older female so please don't get too technical with your answer!!

What size washer do you need? Does your drain have a name stamped on it? Back to you, Tom