Quote:
Originally Posted by retiredguy123
I don't know what you mean by an "outside trap". The only thing visible outside your house is a cleanout plug. That is an access connection for a plumber to unclog your drain line. Your sewer line is not connected to your neighbors. It drains directly into the main sewer line in the street. There is no plumbing trap or backflow prevention device outside of your house. You just have an open drain pipe that runs from your house to the sewer line that runs down the middle of the street.
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I didn't say the line was connected to my neighbors, the employee stated that. There is a trap outside as well as a clean out, the employees boss explained that to me. If there is a sewage backup from the street what prevents it from entering your home if there is no back flow device?