Customer stated water leaking into downstairs shower. Second bathroom is located above downstairs bathroom. Provided estimate to perform leak diagnostic and removed section of drywall in downstairs bathroom. Ran all fixtures in upstairs bathroom verifying nothing is leaking downstairs. Did find bathroom sink upstairs was leaking. Caulking around bathtub is worn and when pouring water on side of bathtub found water was leaking through caulking. Informed customer caulking will need to be replaced and they are going to do this themselves. Thank you for choosing CPI plumbing and Heating.