Does it make a difference how much water gets into the sanitary sewer system?

Any crack or break in the building sewer allows ground water to enter the sewer. These leaks not only create blockages for the homeowner, but allow clean water to enter the sanitary sewer system. Once in the system, this clean water becomes sewage and must undergo all of the expense of sewage treatment and disposal. Similarly, the discharge of water from a water to air conditioner contributes a large amount of otherwise clean water to the sewer system. A single water to air unit can contribute an amount of water equal to 40 single family homes. For these reasons, the discharge from a water to air unit into a sewer drain is prohibited. Homeowners with cracked or broken sewers, or deteriorated pipe may be required to repair or replace the sewer line to eliminate these potential problems. You can contact the Environmental Protection Agency for more information.

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1. What causes blockages to occur?
2. Does it make a difference how much water gets into the sanitary sewer system?
3. What causes sewer odors inside the house?
4. What is the purpose of vapor traps?
5. What is the purpose of a roof vent?