It all depends on 3 things: How much you have been doing, how much body fat you have, and how much you drink before the test. 24hrs-3days depending on these things. Drink lots of water and orange juice because if you drink too much water it will be obvious when you pee is clear. Hope this helps!
Drinking a lot does not get any drug out of your system quicker. Actually, you are just urinating what you are putting in after a while and diluting your system. If you're dirty, you're dirty.. Your urine can even be diluted & dirty.. With only 1 line, you could pass as long as you haven't diluted your system too much.