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A soil pipe that removes fecal matter
No, that is why it is called a vent pipe not a soil line
By cutting in a cast iron Wye so the flow enters the sewer line (soil pipe) at a right angle
Soil pipes and waste pipes differ in their purpose and the type of waste they handle. A soil pipe is designed to carry human waste and toilet paper from toilets to the sewer system or septic tank. A waste pipe, on the other hand, is designed to carry other types of waste, such as water from sinks, showers, and washing machines. Waste pipes can also carry food waste and other debris from garbage disposals. Additionally, waste pipes are typically smaller in diameter than soil pipes.
First you must calculate the fixture unints that are needed then based on the FU you can then increase the soil/ waste line to allow the needed pitch for the fixture unit value
Where all piping waste /soil /storm drainage enter the sewer piping
30 cm cheers broA kitchen WASTE pipe is 11/2" in many codes which is utter stupidity as the kitchen WASTE line does become reduced with grease and soap scum depositsIf the WASTE piping is going under ground to connect to the SOIL line (sewer piping) then 2" is strongly recommended as snaking an 11/2 line can be very challenging as the fittings are very short radius
Pipe-to-soil potential is the potential of a pipeline at a given location.
Not necessarily as some systems do have a storm water piping to keep soil and waste separate from storm
What kind of pipe? Is this area exposed to acid rain?
1/4" per foot
A pipe extended above the roof level is a soil pipe.