Came out for a high pitched noise coming from a downstairs bathroom when upstairs toilet was flushed. We ran water from every fixture upstairs and downstairs, no noise. Checked the water pressure, no issue on the water pressure. Was unable to recreate the noise to figure out where it was coming from. Customer said it has happened randomly a few times over the last month but hasn’t happened for the last week. Recommended she try and record the noise should it happen again and check the crawlspace to see if the noise is louder under there. Left quote for water heater as it is from 2010.
