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Mysterious backup in mainline fiveplus@excite.com 11-19-2006
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Posted by fiveplus@excite.com on November 19, 2006, 4:51 pm


Several months ago the mainline backed up (flooded the basement laundry
room and bathroom.) Called roto rooter to clear out roots and that
fixed the problem.
After a few months with no problems, while taking a shower in the main
floor bathroom, both the laundry room and basement bathroom flooded
again.
I called to have the mainline scoped again. The plumber said there was
nothing blocking it and the water was draining fine. He found nothing
with his snake.

So the question is... what could cause 2 different basement drains to
flood while taking a shower upstairs at 7am, but at 10am there is no
blockage in the sewer mianline and water is draining fine?

Any thoughts?


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Posted by Charles Schuler on November 19, 2006, 5:17 pm



> Several months ago the mainline backed up (flooded the basement laundry
> room and bathroom.) Called roto rooter to clear out roots and that
> fixed the problem.
> After a few months with no problems, while taking a shower in the main
> floor bathroom, both the laundry room and basement bathroom flooded
> again.
> I called to have the mainline scoped again. The plumber said there was
> nothing blocking it and the water was draining fine. He found nothing
> with his snake.
>
> So the question is... what could cause 2 different basement drains to
> flood while taking a shower upstairs at 7am, but at 10am there is no
> blockage in the sewer mianline and water is draining fine?
>
> Any thoughts?

Yes; the problem is beyond the reach of the plumber's snake.



Posted by fiveplus@excite.com on November 19, 2006, 5:56 pm


We thought of that, he snaked in 90 feet. It is only 75 feet from the
house to the sewer line. Not to mention the fact that he didnt hit
anything in the sewer line but things were flowing fine.
Thanks

> Yes; the problem is beyond the reach of the plumber's snake.


Posted by Charles Schuler on November 19, 2006, 6:03 pm



> We thought of that, he snaked in 90 feet. It is only 75 feet from the
> house to the sewer line. Not to mention the fact that he didnt hit
> anything in the sewer line but things were flowing fine.

There are two possibilities: not enough fall from your home to the main
line or the main line has a problem.



Posted by Pete C. on November 19, 2006, 6:53 pm


Charles Schuler wrote:
>
> > We thought of that, he snaked in 90 feet. It is only 75 feet from the
> > house to the sewer line. Not to mention the fact that he didnt hit
> > anything in the sewer line but things were flowing fine.
>
> There are two possibilities: not enough fall from your home to the main
> line or the main line has a problem.

My vote is for a restriction further down the main line. The problem
occurs in the AM when everyone in the neighborhood is taking their
shower and with the restriction the main line can't handle the flow
rate. Later in the day there is less load on the main line so everything
is fine.

Pete C.

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