For a basement 4" drain line can I have it run approx 25Ft and a 45 degree elbow and then another run for about 6 ft before connecting to the main waste line, will I have a problem with it flushing correctly? The venting part is already to go but want to make sure it work correctly before I dig out the area for the 4" line. Is there a certain amount of pitch you need to have every few feet? Someone told me you need 1/8" pich every foot or so(?)
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Basement Waste Line