Mitchell-DIY-Guy
Well-Known Member
While the plumbing in my home works well, my next door neighbor (with an identical home and identical plumbing system) has had one major sewage blockage, and a second minor one in the past few months. He claims no normal offense: no unsavory or inappropriate things tossed in the toilet. So, he suspects that perhaps the slope of the main drain isn't right.
So, this is a very long run in the crawl space of the home, probably about 70' or more from the furthest toilet to the exit. The main drain line is 3" Sched 40 PVC. Is the slope supposed to be .25" per foot? That would mean a drop of 17.5" or so from the start of the main at the furthest toilet, to the connection at the front of the house.
Any considerations here? The toilets are new meaning low flow. There are I believe, two bends probably totally 45 degrees. All the other drains eventually tap into the main.
Any advice on investigation this with my neighbor before we put on the spelunking hats and go measuring?
So, this is a very long run in the crawl space of the home, probably about 70' or more from the furthest toilet to the exit. The main drain line is 3" Sched 40 PVC. Is the slope supposed to be .25" per foot? That would mean a drop of 17.5" or so from the start of the main at the furthest toilet, to the connection at the front of the house.
Any considerations here? The toilets are new meaning low flow. There are I believe, two bends probably totally 45 degrees. All the other drains eventually tap into the main.
Any advice on investigation this with my neighbor before we put on the spelunking hats and go measuring?