None, people used to think it caused erosion or leave solids behind but it was proven not true
Waste water will run away too quickly to properly carry away any solids in drain pipe, eventually causing a clog.
With a level
Radio Shack "drain pipe tracer".
$8,300
Foul Air
Yes, a sewage drain pipe can be too large.
If you are talking about a roof water drain pipe to sewer it is illegal. If you are talking about a sink drain pipe well that is where they all connect to so yea.
dvw pipe = drain, waste and vent pipe.
If your thinking of sleeving the pipe it is not a great idea..Ideally replace the defective piping as drainage systems are designed by fixture units and reducing the pipe can cause major problems
Probably the wrong size flange. Is the flange a toilet collar? If so the pipe is probably 4 inch.
I would guess about $100. Drain pipes and holding tank open well pipe to drain that antifreeze in the drain traps
As long as the pipe going into the wall is straight, the rest of the drain pipe can be routed however it needs to be. Very often the trap is at an angle to the pipe in the wall.