.25 per inch per foot
There is NO correct pitch... MINIMUM would normally be 1/8 per ft BUT then of course you cannot have as many drainage fixture units connected to this line.The total FU's allowed are based on pitch and diameter of the piping
The min PITCH depends on the diameter of the soil ,waste , leader line 1/16 for 8" etc
That would depend on the fixture load and the pitch of the line and the local codes as far as connecting to the public sewer /storm system
3" - 6"
1/16 per inch BUT the pipe must be at least 8" diameter and then only 1440 Fixture units can be connected If you increase pitch to 1/2" per ft then you can go up to 2300 fixture unites
One should also check the local codes .When I install 8" diameter waste or soil or storm lines I know I can use 1/16 in per ft BUT I have to use considerably less fixtures connected to this line then if I increased the pitch to 1/2" per ft
A sewer "rod" is normally no larger then 3/8 of an inch diameter BUT a SEWER Cable can be as large as 11\4" even the small sewer rods can have large heads to maintain sewers as large as 36"
It depends how much back pitch there is
Should be low enough to maintain proper pitch and below the frost line if applicable
That would depend on PITCH more pitch more fixtures allowed
Depends on the fixture unit value I was looking for and the diameter of the piping involved
1/8" per foot