It's a common question with a not-so-simple answer. Where you dump your bong water depends on a number of factors, including what type of bong you have, what type of water you're using, and what your local regulations are. Here's a breakdown of the different options to help you make the best decision for your bong and your community. If you have a glass bong, the best option is to dump the water down the sink with the stopper in place. This will prevent the water from damaging your pipes and will keep your bong clean. If you have a plastic bong, you can also dump the water down the sink with the stopper in place. However, you may want to consider dumping the water outside. This is because plastic bongs can absorb chemicals from the water, which can give your bong an off-flavor. If you're using distilled water, you can dump it down the drain without the stopper in place. However, if you're using tap water, you should always use the stopper. This is because tap water contains chlorine, which can damage your pipes and give your bong an off-flavor. Finally, you should always check with your local regulations before dumping any type of water down the drain. Some areas have restrictions on what can be dumped down the drain, and you don't want to risk a fine or damage to your pipes.