A 4 in. horizontal building drain is installed below a slab. Which minimum gravity slope is commonly used for 3 in. through 6 in. drainage pipe?
Correct Answer
C) 1/8 in. per ft
For 3 in. through 6 in. horizontal drainage piping, 1/8 in. per ft is a common minimum slope. Other choices are too flat, are the small-pipe slope, or are unnecessarily steep for the stated pipe.
Why This Is the Correct Answer
For 3 in. through 6 in. horizontal drainage piping, 1/8 in. per ft is a common minimum slope. Other choices are too flat, are the small-pipe slope, or are unnecessarily steep for the stated pipe.
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