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I may be dyslexic, but this is a Ttub Plug and may be just the thing she needs.Terminator
I spoke to her about using a marine grade mettallic-based paint and gluing different bottlecaps and/or decorative mini aluminum discs from a craft store.
I did tell her that she never brought the drain cap concern to my attention before she bought the spa.
you'll send her a free rubber duck.
The rubber d**k was already suggested.Terminator