
Originally Posted by
junezhu
I went to a local Ferguson and the guy there didn't have any clue. He only knew one whole or two whole overflow. Do you know the exact name of this kind? What's the manufacturer? Thanks a lot. June
I transposed the name of the manufacturer -- It's American Brass & Aluminum (AB&A).
It's a lift and turn, similar to the tap-toe in Marks first reply.
If you still have the cap that threaded onto the overflow for testing purposes, you can confirm this by looking on the surface of the inside of the cap, which should have "AB&A" stamped on it.