No, the detergent used in your dishwasher is not designed to keep your sewer line open. Dishwasher detergent is formulated to clean dishes, remove food particles, and dissolve grease and grime. It is not intended to unclog or maintain the sewer line.
If you are experiencing sewer line issues such as clogs or blockages, it's best to address them separately using appropriate methods. Common solutions for clearing sewer line clogs include using a plumbing snake or auger, employing a sewer jetting service, or contacting a professional plumber to assess and resolve the issue.
Using dishwasher detergent in your dishwasher will not have any direct impact on your sewer line's condition or potential blockages. It's important to use dishwasher detergent according to the manufacturer's instructions and focus on proper maintenance and cleaning practices for both your dishwasher and your sewer line.