Possible Clues:

• This will stop me slipping when 22 down, by the sound of it, perhaps
• Plumber often wants it cleaner
• It did be for herself, this sort of a ring
• Not the sort of ring one might expect from 16 down
• A female in the fighting ring
• Flat ring
• Perhaps laundryman has had a sex change?
• Twas herself that had been 16 down - next thing to a nut
• Securing ring
• Machine with a rinse stage