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Posted by DaileyJohn.20.decij@spamgourme on August 20, 2006, 6:40 pm
I have had a leaky basement, and I had corrugated polyethylene
pipe (about 4 inches in diameter) installed on two sides (South and
North sides) of my house under about 8 inches of soil. There is
generally a slight back to front slope on the house (with some
depressions that would block water), and I was hoping that the pipe
would take the water past the front of the house and ultimately to the
street that is in the front of my house. On the South side of the
house, there is about 25 feet of pipe from the first drain opening
(located at the very back of the house) to the second drain opening,
and there is generally a downward slope between the two drains on the
surface. However, when I ran a hose full blast down the pipe for about
10 minutes no water reached the downstream second drain. The
installers stated that since the pipe was permeable (and the ground is
dry) that could explain the lack of water flow to the second drain. I
understand that the pipe is permeable, but it seems to me if the pipe
had an adequate consistent slope downward, some of the water would have
reached the second drain. So, my question is, is pipe properly
installed or have the installers failed to construct a proper downward
slope when they installed the pipe? Or are other forces at work.
The parallel pipe installed on the North side of the house does
drain some water, but the water flow is slow although my water hose
test (hose going full blast for 15 minutes) only resulted in a slow
flow of water to the corrugated pipe's endpoint, which was about 25
feet from the point at which I ran a hose into a drain to test the
flow.
Any help with these issues would be appreciated.
Thanks,
JD
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Posted by hallerb@aol.com on August 20, 2006, 7:06 pm
these pipes under the basement floor?
if they were installed in a bed of gravel thats about what you should
expect.
check outles at next rainey time.....
i did much the same checking a indoor perimeter drain system that
drained to a sump pump, hose ran for a couple hours in a small home
before I saw much activity. I watched the install carefully so I knew
it was properly installed, the dry ground and gravel bed suck up the
water
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Posted by m Ransley on August 20, 2006, 7:19 pm
Hopefully they installed the pipe with drain holes on the top and sides,
not bottom.
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Posted by DaileyJohn.20.decij@spamgourme on August 20, 2006, 9:20 pm
> these pipes under the basement floor?
The pipes are not under a basement floor, but they were installed
in a bed of gravel. I would infer from your statement that the gravel
and the water suck up much of the water that, the water travels down
the bed of gravel away from the house. If that is the case, what is
the point of the corrugated pipe? Also, I would add that the house has
a sump pump and that the pipe from the sump pump was blocked. I have
installed a new sump pump pipe, and the pump should be more effective
now. I was hoping with the installation of the parallel pipes that I
would get better drainage and wouldn't have to check into or repair the
weeping tiles that were probably installed when the sump pump was
installed.
JD
hallerb@aol.com wrote:
> if they were installed in a bed of gravel thats about what you should
> expect.
>
> check outles at next rainey time.....
>
> i did much the same checking a indoor perimeter drain system that
> drained to a sump pump, hose ran for a couple hours in a small home
> before I saw much activity. I watched the install carefully so I knew
> it was properly installed, the dry ground and gravel bed suck up the
> water
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Posted by Lawrence on August 20, 2006, 10:04 pm
DaileyJohn.20.decij@spamgourmet.com wrote:
> > these pipes under the basement floor?
>
> The pipes are not under a basement floor, but they were installed
> in a bed of gravel. I would infer from your statement that the gravel
> and the water suck up much of the water that, the water travels down
> the bed of gravel away from the house. If that is the case, what is
> the point of the corrugated pipe?
The point of the pipe is to increase the volume of the drainage field
beyond what the gravel alone would handle. It is usually wrapped in
landscape fabric and directs the flow of water in a specific
direction. Flooding the field with a hose is not a good test compared
to an actual rainstorm. A better test might be: Does the basement
still flood in a storm??
It is entirely plausible that the drainage was indeed installed
correctly and in fact was done so well that its' capacity greatly
exceeds the volume of youy garden hose to the point that all the water
is indeed sucked up by the gravel and surrounding soil long before it
gets downstream. this is what you would hope for since a big enough
rainfall could overwhelm any drainage field. I wouldn't worry until a
big storm is forecast. then just make sure you check the basement for
leaks and the downhill pipe for volume. then you will have a better
ide of what's up with the install.
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