Hi agro23, Thank you for your review. We apologize for the damage you had to your cabinet upon delivery. Our vanity top does not contain an overflow hole, the sink would simply drain slightly slower than a sink that has an overflow hole. As a leading manufacturer for baths sinks and vanity tops for the last 25 years, we have removed the overflow holes because it creates the opportunity for unwanted bacteria in the bathroom. Most overflows are designed so that they cannot be cleaned and, over time, will develop mold and mildew that usually will require the homeowner to change out their basin. With thousands of tops/sinks sold in the market today, our customers love not having the overflow/mildew issues. We can assure that all our sinks are IAPMO Approved to meet or exceed the national plumbing code. Our best recommendation would be for you to consult with your local Home Depot Bath team member for the drain that will best fit your vanity top. Please feel free to reach out to our Customer Service team by calling 1-800-235-7747 so that we may personally discuss your questions and concerns. Best regards.