[masraum]

I have a bathroom sink and faucet exactly like this (pic from the 'Net). I believe it's an American standard. We got the faucet rechromed and I'm reinstalling the faucet sink. Unfortunately, it's been 1-1.5 years since I disassembled the sink/faucet, and when I did, I assumed we'd buy a new faucet (not many options these days, probably mostly junk so we're going this route).



My question is around the nuts and washers that hold the faucet body to the sink. The faucet body is behind the sink, and the stems have 2 nuts and 2 "washers" that hold the faucet in place from the sink side. The washers have a U shaped cross section, and the "top" of the U is what faces the sink.

Should be some sort of rubber or something that sticks out of the back of the washer (top of the U) to press against the sink, like a rubber gasket or something. What do you think?

Or should those just go up against the sink, and if there's a rubber washer, it should be on the back side of the sink closer to the brass nut?

Or should there just be nothing (which could allow water from through the sink to drip out of the back side)?