Can water flush 0ut 1 opiate pill in 3days?

The simpliest way to test negative is to drink ALOT of water. Like 2-3 gallons a few hours before testing start peeing at home

then when your urine is clear(pee in a clear glass when you hold it up and can see clearly right thru it) you can go drop and it will come up negative!! It will come up negative dilute, but its negative