What is the standard drop rate contained by home plumbing? replacing drain lines in home asking the code for the drop...

replacing drain lines in home asking the code for the drop sour of the pipe

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The first answer is correct and to give to it: If pipes are pitched too much, the water will escape the solids resulting surrounded by more plugged drains.

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Depending on the size of the pipe, minimum slopes are as follows for shown size pipes:
2.5" or less - 1/4" per foot
3-6" - 1/8" per foot
8" and larger - 1/16" per foot

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Answers:    Minimum 1/4 inch per foot

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