Most users report that the fastest way to get Delta 8 THC out of your system is to drink plenty of water. Water will help flush the cannabinoid from your system and dilute the Delta 8 metabolites, so they aren't detectable to drug testing. However, water may not be enough to flush Delta 8 out of your system if you are a heavy user of the cannabinoid. It may be necessary to make or purchase a detox drink containing activated carbon to flush your system and pass a drug screening.