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.
Yes, termites can live in sewer lines.
Of course.
4" is the standard house sewer main
You DON'T
One of three options to consider. One. Get your septic tank emptied and cleaned out completely and your sewer lines flushed. Two. There is a blockage in your line. Three. Repair or install vents on your sewer line.
One drain outlet is sufficent provided the drain outlet to the sewer line or to the gully outside has the correct gradient fall.
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.
yes
With a water Jetter which will scour the lines to restore full flow
The obvious and main problem (and reason to keep your sewer lines clean) is because a backed-up sewer line means that sewage can get backed up into sinks and bathtubs. This is unsanitary and a health hazard. A broken sewage line is costly to repair.