Hjgmvca
New Member
I need to fix a bathroom remodel problem. The previous owner turned a hall closet into a small half-bath (toilet and sink). The drains from the toilet and sink meet below the room and the waste is carried horizontally in a 3" PVC pipe to the main drain pipe about 14ft away. The horizontal pipe was installed with minimal slope and has now backed up. The pipe is running in the crawl space about 24" high. The plumber who came to look at it wants to install a new horizontal pipe that will be put in a trench that must be dug in the crawl space. I'm wondering if instead of the trench, we use the space between the bottom of the joists and dirt to slope the pipe on its 14 ft run. How much slope is required for this length? A drop of 6" from beginning to end? 12"? Every inch counts here so please be as exact as you can?
Thanks for any advice or useful links.
Thanks for any advice or useful links.