The exact answer, based on the provided reference, is that the ideal slope of a kitchen sink drain line, like any drain line, is ¼ inch per foot of pipe.
Understanding Drain Pipe Slope
This means that for every foot the drain pipe travels horizontally away from the sink, it should drop vertically by a quarter of an inch.
As highlighted in the reference from Mr. Plumber Atlanta, "The ideal slope of any drain line is ¼ inch per foot of pipe. In other words, for every foot the pipe travels horizontally, it should be dropping ¼ inch vertically."
Why Proper Slope is Crucial
Maintaining this specific slope is vital for effective drainage. The reference notes that having either too little slope or too much slope can lead to issues and are considered costly DIY plumbing mistakes.
- Too Little Slope: The water flow is too slow to carry solid waste effectively, leading to frequent clogs.
- Too Much Slope: The water can outrun the solids, leaving them behind in the pipe, which also contributes to blockages over time.
Therefore, ensuring the drain pipe drops by precisely ¼ inch for each foot of horizontal distance is essential for reliable and clog-free operation of your kitchen sink drain.
