I'm sorry to see you aren't completely satisfied with your American Standard Passage shower base.
The base needs to be installed in a bed of mortar to fully support underneath the tub. Review the installation instructions for additional details. We put a lot of thought into our products, so it is unfortunate whenever we do not meet a customer’s expectations. We would like to connect with you to learn more about your experience to find a way to help! Please visit the American Standard Website, and email us directly through the “Contact Us” section and reference your review. Your American Standard Consumer Connection Team.