I'm a 22 male, 6 feet about 170lbs. I had one glass of scotch on Friday night and I have a test Monday. I've been drinking water and ran Sunday. Will I pass a ETG test?

Probably, yes. Nothing is 100% guaranteed, of course. I'm a scotch drinker myself. I hope it was good Scotch and worth the price if you fail.

If you flooded your system with water that will show and it will be an automatic failure.

Absolutely you will pass.