Flush toilet 10 times in succession on main floor above Basement bathroom. Ran bathtub for approximately five minutes. Ran the shower In the same bathtub for approximately five minutes. Filled the bathtub up to the middle of the overflow cover (Has been sealed with caulk all the way around the circumference) and went downstairs to check to find copious amounts of water dripping through the ceiling. Opened the ceiling to further pinpoint the source and found water coming from three sides of the subfloor around the opening where the drain protrudes through the subfloor. Pulled the plug and let the water drain out of the bathtub. Pulled back the tub mat and found a crack in the bottom of the bathtub. Bathtub will have to be replaced. Will contact Striking Remodel reach out to schedule an appointment to provide a proposal for replacement. No warranty. Paid by card.