Your yeast water may seem active, but it may not be acidic enough to be consumed. Yeast creates acid during its metabolic process and when it does so, it produces lactic acid. Lactic acid is a natural preservative found in many foods including milk, meat, and vegetables. It can also be found in some fruits such as grapes and berries. Yeast also produces alcohol during this process and while most yeast cells will die off after producing these acids, some of them may still be alive. If you consume the water, you risk consuming these live cells which could cause problems for your digestive system. Instead of drinking your yeast water, you should dispose of it properly. You should pour it down the drain or into a sewer line. Doing so will prevent any possible contamination of your plumbing system. If you are worried about drinking your yeast water because it looks clear and contains little sediment, then that means that it is probably okay to drink. However, if it smells bad or appears to be contaminated, then you should probably throw it out. Follow proper sanitation procedures when working with yeast water to avoid contaminating other parts of your home.