What is the Waterbox phone number? Amy Milner March 14, 2019 16:00 Updated Follow Can I speak to a live customer support agent? Absolutely! You can reach a Waterbox support agent by calling 1-800-674-2608. Related articles Do you have any promotions, coupon, or discounts? Can I purchase just the tank or just the stand? How do I submit a claim for a damaged or defective product? Where can I get a Cube 4, 7 and 15 gallon? Where are my lights? Comments 0 comments Article is closed for comments.