No, there shouldn't be any standing water in a sewer line, this is what creates bad bacteria and disease. All waste needs to go down a sewer line and disappear ito the street sewer line. If this is the case, either you have a slight blockage or the sewer line gradient is incorrect. The correct ratio for the gradint of a sewer line must be 1:40 (meters) simpler measurement for slope is 1/4" per foot(ideal). absolute minimum 1/8" per foot(not recommended except where not avoidable)
Enough to fill the traps crown weir to prevent sewer gases /fumes from entering the structure
A water or sewer main is as it sounds ,It is the main feed line that runs underground usually along side a street or easement from your house or place of business to connect you to these utilities.
You should call a professional landscaper or a drainage specialist to address standing water in your yard.
ABOVE the sewer line and on an angle away
Depends on how hot as the EP has their own rules to prevent possible sewer piping to crack or scalding sewer workers
To stop sewer gasses from being expelled from the sewer
Goes straight to sewer
If grey water is left unused for too long it evaporates and then causes sicknesses so the water should go to the sewer.
After leaving the sink, water goes into the home's main drain,and from there to a street sewer to the sanitation plant or to your own septic tank (which is really a small sanitation plant in itself)
The sewer line in the house runs underground to the street and empties into a larger pipe. That pipe runs to the treatment plant which can be many miles away. There the sewage is treated and the water is put into a stream, river or the ocean.
Yes, it will do that. It is also unsanitary. You should have your floors professionally cleaned.
In the event of a basement sewer backup, you should immediately stop using water in your home, avoid contact with the sewage water, and call a professional plumber or water damage restoration company for help. It's important to address the issue quickly to prevent further damage and ensure your safety.