A 4-inch diameter building drain is installed with a slope of 1/8 inch per foot. According to the 2022 CPC, is this installation compliant for a sanitary drainage system?

• Yes, but only if it is installed in uniform alignment.
• No, because all building drains require a minimum slope of 1/4 inch per foot.
• Yes, because 4-inch pipe requires a minimum slope of 1/8 inch per foot.
• No, because the slope must be greater than 1/8 inch per foot for 4-inch pipe.