Recently, I encountered an interesting situation beneath a home in New Orleans. I discovered a 4-inch drain pipe that had an excessive slope, which is not ideal for pipes carrying solids. This configuration causes water to flow at a faster pace than the solids, potentially leaving behind debris such as toilet paper. Obviously, we wouldn’t want anything remaining in the pipe from the behind. I recommend a video plumbing scope on every home purchase, especially around New Orleans where there is a lot of soil subsidence.
To rectify this issue, it’s crucial to ensure that the slope of the waste pipe is at an appropriate angle. Ideally, there should be a drop of one-quarter inch per foot or 2.5 inches per 10 feet, allowing the water and solids to flow smoothly together. This is the proper code according to the International Code Council.
In fact, on a recent project in Uptown New Orleans, I had the opportunity to work on a 160-foot drain pipe that extended from an in-law suite in the backyard to the main house closer to the street. The pipeline comprised a 4-inch line which transitioned into a 6-inch terra cotta pipe as it approached the sidewalk. I took meticulous measurements using my Zip Level and installed the entire pipe with a perfect slope, which was easily observed through one of the five cleanouts, located about 5 feet away from the sidewalk.
To validate the effectiveness of my work, I conducted thorough tests. I flushed all five toilets, and it was gratifying to witness the test toilet paper rolling along with the water wave at the end of the line. This dynamic signifies a successful implementation, with both water and solids moving harmoniously down the pipe.
By utilizing high-quality materials such as ABS and PVC plastic, I ensured durability and longevity for this particular pipe. It is poised to withstand the test of time, unless any future soil movement disrupts its integrity. Meanwhile, the presence of multiple cleanouts along its length provides convenient access for any future maintenance needs.
