Water is coming up into other sink about an inch, no vent just staight down to main drain, nothing is hooked up to sink, ran a snake did every thing

Hi Dave

Looks like you need to run the snake again... *UGH*! This time, put a couple kinks in the snake... makes it so the snake doesn't just punch a hole through stuff... actually scours the drain line.

While snaking keep hot water running into the drain using a hose if possible (can buy an aerator x hose adapter that will fit in your sink spout or hook hose to hot water heater drain).

Combined above, and if you go far enough, you should end up clearing the drain real well.

If this fails to clear the drain then you need a larger snake, a longer snake, or may even need to take other steps!

Start here and let me know how you make out, OK?

Mark