Question: how often can you use baking soda and vinegar to unclog a drain?
Answer: Keeping Pipes Clear Baking soda and vinegar come in handy to help keep the pipes clog-free, too. Every few weeks, or whenever the water seems slow to drain, pour 1/2 cup baking soda in the drain, followed by 1/2 cup vinegar. Plug the hole, then unplug it after 1 hour.