Anybody ever use these?

[Marvin willis]

I
I’ve had these drain plugs for years but never used them. Has anyone used them? The reviews are good. Just don’t know how well they seal. Thanks

 

[HawaiiBreeze]

Those look like the PWC plugs. Think I might be a little concerned with something dropping into the bilge and hanging up the little float ball so it lets a little water in when at rest. I've pulled crazy things out through the drain plug hole that would probably would jam the little ball and give me trouble. Keep a wary eye on that.