Yes, termites can live in sewer lines.
Outside diameter (OD) of adjacent manholes (including the bottom slabs) should have minimum of five (5) feet horizontal clearance.
Of course.
4" is the standard house sewer main
1%
You DON'T
Yes, but normally it is an extra
A sewer contractor repairs and maintains existing sewer lines in addition to constructing and installing new ones. These jobs can be for residential and/or business clients.
1% pitch is min
yes
A little more detail about the sitsuation would help. New construction, remodel, sewer outlet in the house to street or sewer outlet in house to main going out of house.
It should be 3" minimum, preferably 4.