[jparril113]

I must have lost a retention clip. I'm looking for a name so I don't have to rely
too much on the helpers down at the hardware store.

 

[Nealtw]

do you know the brand?

 

[chandler48]

This is for a Delta, but most are similar. https://www.homedepot.com/p/Delta-Quick-Connect-Clip-RP32522/203725415

 

[Old Thomas]

I think that can use a C clip. Maybe an E clip, I can’t see it well enough.

 

[chandler48]

It will have to be a double clip as I posted since it is held in place in two locations, above the junction and on the junction opening. A "c" clip or "e" clip would be too thin.