In alt.home.repair, on Sun, 11 Jun 2017 15:43:59 -0000 (UTC), HerHusband
wrote:

That first adapter is what I had in mind if I can find one locally. I'll
have a look at Lowes this afternoon.

Talk to someone at a plumbing supply store. They all sell to
non-plumbers, and he may have something no one here has thought of.

And he'll have the adapter too.