How much water do you drink to get heroin out of your system?

Heroin will usually stay in your system for 2-5 days. Drink several glasses of water so you urinate as much as possible before your drug test. But, be warned that drinking enough water to flush your system will result in clear urine which will be considered too diluted and you will fail your drug test. After you've drank enough water, and your urine is clear, drink enough soda to make you urinate a couple more times to make your urine a yellowish color.