A plumber can introduce a tracing dye at a known fixture and look for it at a downstream access point. Seeing the dye can help confirm that the fixture discharges into the line being observed. The test can be helpful when an addition or remodel left the route uncertain.
Match the test to the question
Tell the plumber which fixture or branch you need to trace and what drawings you have. If the dye is visible downstream, ask which access point was used and how the finding was recorded. If it is not visible, ask whether other branches, dilution, or limited access could explain the result.
Combine tracing with inspection when condition matters
A dye test can help trace flow. A camera can provide information about visible pipe condition, such as roots or a displaced joint. Ask the plumber which checks will answer your question before authorizing exploratory work.
Learn more about our sewer camera inspection service.