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Old 04-30-2010, 01:35 AM   #1
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Basement drain pipe "pit" ground water fix.


Recently bought a house that has a finished basement, unfortunately, a week or so before closing on my house we had record rain fall here in NJ and the basement flooded.

The basement did not flood through the walls or anything, but from a " pit " in the basement floor where the clean outs are for the main drain pipe.

Issue is the " earth " around the pipe, its just dirt. The ground gets so saturated that it'll fill up with water. In the case of the small ' flood ' last month it brought in so much water i had to rip out all the carpet, and i plan on re-doing the walls as well.

I havent seen any water come out of it since, but i HAVE seen it filled with water. almost to the point of over flowing( after about 3 straight days of rain )

I want to start the demo and remodel of finishing this basement but i cant seem to wrap my head around on how to solve this issue.

Anybody know of any ' fix' or solutions i can do for ensuring water does not seep out of this?

i HEARD that what i can do is :
Dig out about 8" of dirt of so, install pvc with p-trap in to earth, then p trap then in to the drain pipe, then back fill the entire hole with concrete , only enough so you can still access clean outs.If ground water wants to come up it will take the path of least resistance, ( pipe ) and go right into the drain pipe
any insight on this?

I know i COULD put a sump pump in there and pipe it out, but i'd rather not have the water coming in AT ALL.

Below or some pictures of what i am dealing with, any advice would be greatly appreciated!





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Old 04-30-2010, 08:07 AM   #2
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Basement drain pipe "pit" ground water fix.


Check Fema's flood plain maps. Was it disclosed that they had a potential of flooding during the pre-close? If you had the rain before closing and still signed, why did not you have the sellers fix the problem before signing the paperwork. I would suggest at this time also talking to a lawyer to see if the sellers can pay for the cost of repairs.

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Old 04-30-2010, 08:22 AM   #3
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Basement drain pipe "pit" ground water fix.


Now that you saw it flood, you now know that sometimes the water table will rise that high.

You will need a sump pump.

Depending on how porous the soil is under the entire area of the basement, you may or may not
need a perimeter drain system (French drain; weeping tile system) that brings water to
the sump pump pit before that water can soak up into the basement at the far side.

Meanwhile check outside upstairs to make sure water does not collect against the foundation
when it rains. Water from gutters and downspouts must be routed away from the house and
it may be necessary to regrade the land.

Do not run the ground water down any drain or septic tank.
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Last edited by AllanJ; 04-30-2010 at 08:25 AM.
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Old 04-30-2010, 01:51 PM   #4
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Basement drain pipe "pit" ground water fix.


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Originally Posted by gregzoll View Post
Check Fema's flood plain maps. Was it disclosed that they had a potential of flooding during the pre-close? If you had the rain before closing and still signed, why did not you have the sellers fix the problem before signing the paperwork. I would suggest at this time also talking to a lawyer to see if the sellers can pay for the cost of repairs.
The sellers and I worked out a deal before closing where they cut me a check for the estimated price of damages to the tune of about 4,000 dollars. IMO thats pretty decent for having to spend a few bucks on a sump pump and 1500 bucks or so on some carpet. ... I will be taking it once step further and installing mold proof dry wall and foam board in the basement and floors before i " re-refinish " the basement. Along with a quality de-humidifier.

I was just wondering if there was maybe a fix OTHER then just popping a sump pump in there, This side of the basement will be finished with a tv and sitting area and i'd hate to hear a sump pump kicking on during my fav. tv show.

But if i will be doing a sump pump, i suppuse i'll dig out about 8-12 inches of dirt and throw in gravel so that the sump is less likely to just suck in dirt and clogg itself.

Can the main drain line out of the sump can run clear across the basement in the ceiling and tap in to my other sump line, or at least next to the existing hole? its probably a good 30 feet away or so.
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Old 04-30-2010, 05:28 PM   #5
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Basement drain pipe "pit" ground water fix.


If the soil under your basement floor is porous enough (or if you have or install a
perimeter drain system)
then you can dig a pit for the sump pump on the opposite side
of the basement and not have to do anything with the pit you already have.
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Old 05-01-2010, 01:34 PM   #6
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Basement drain pipe "pit" ground water fix.


Quote:
Originally Posted by alecmcmahon View Post
Can the main drain line out of the sump can run clear across the basement in the ceiling and tap in to my other sump line, or at least next to the existing hole? its probably a good 30 feet away or so.

Do you already have one sump pit and pump? Does it work?
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Old 05-01-2010, 02:42 PM   #7
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Basement drain pipe "pit" ground water fix.


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Originally Posted by jogr View Post
Do you already have one sump pit and pump? Does it work?
yes i do, its on the other side of the basement on the " utlility " side.
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Old 11-13-2010, 10:04 AM   #8
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Old 11-14-2010, 08:59 AM   #9
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Basement drain pipe "pit" ground water fix.


Quote:
Originally Posted by alecmcmahon View Post


i HEARD that what i can do is :
Dig out about 8" of dirt of so, install pvc with p-trap in to earth, then p trap then in to the drain pipe, then back fill the entire hole with concrete , only enough so you can still access clean outs.If ground water wants to come up it will take the path of least resistance, ( pipe ) and go right into the drain pipe
What is this drain pipe you're talking about?
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Old 11-14-2010, 11:56 AM   #10
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Basement drain pipe "pit" ground water fix.


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Originally Posted by jomama45 View Post
What is this drain pipe you're talking about?

The drain pictured, which is the main clean out for the main sewage line.

Again, i have a sump on the oppisite side of the basement.

I think what i might do is dig out 6"-8" or so of dirt around the pipe in the pit, install some drainage gravel and set a sump pump in it and pipe it out.

Leave a can of damp rid in there for moisture and frame it in with an acess door when the walls get done.

Unless anybody else has some better recommendations?
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Old 11-15-2010, 09:24 AM   #11
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Basement drain pipe "pit" ground water fix.


I'm going to give this thread some thought since I've seen a few water problems. How much lower is your basement floor than the height of your yard? Is you lot level? If not how much grade? Might take me a few days to get back here.
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Old 11-15-2010, 10:07 AM   #12
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Basement drain pipe "pit" ground water fix.


my basement is about 95% under ground level.

I have a sump about 30' away on the other side of the basement that works just fine.

I've only seen this pit fill with water maybe 3-4 times in the last 7 months i've lived here.

The week before i bought the house here in NJ we had days and days and days of heavy rain and the water table under ground rose so much that the water in the pit got so high it came out and flooded the entire basement. Other then that i've never seen it get high enough to come over the top of the slab.

Again, i assume the best way to takle this to insure my newly renovoted basement doesnt see water out of this is to dig out 6-8" of dirt around the pipe, install some drainage gravel and stick a sump pump in there.

any other ideas?
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Old 12-01-2010, 01:53 AM   #13
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Basement drain pipe "pit" ground water fix.


not sure but keep us posted. curious to see what solution would work best
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Old 12-01-2010, 06:42 AM   #14
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Basement drain pipe "pit" ground water fix.


Quote:
Originally Posted by alecmcmahon View Post
my basement is about 95% under ground level.

I have a sump about 30' away on the other side of the basement that works just fine.

I've only seen this pit fill with water maybe 3-4 times in the last 7 months i've lived here.

The week before i bought the house here in NJ we had days and days and days of heavy rain and the water table under ground rose so much that the water in the pit got so high it came out and flooded the entire basement. Other then that i've never seen it get high enough to come over the top of the slab.

Again, i assume the best way to takle this to insure my newly renovoted basement doesnt see water out of this is to dig out 6-8" of dirt around the pipe, install some drainage gravel and stick a sump pump in there.

any other ideas?
You will need to enlarge the hole width or length and dig down at least 24". You will need to provide a basin that will not fill with dirt so a filter cloth and gravel will need to be introduced around this basin.
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