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Author Topic: dry well and no sump pit? halp!  (Read 5659 times)
pbfvoo
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« on: April 05, 2008, 09:04:37 PM »

for the first time since we've owned this home (4 yrs now), we've experienced significant flooding in our finished basement.  we threw the carpet out, cut up about 2ft of drywall all around, and now are seeing water seep up through the floor for the 2nd time (first was January heatwave, now normal spring thaw). 

apparently the builders of our neighbourhood elected to put in a dry well in our backyard somewhere, and no sump pit or pump.

what can we do that will minimize excavation?  will we need to put in a sump pit and drain out to the weeping tile?  or can something like your IWCS address our issues? 

thanks!
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Rod Johnson
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« Reply #1 on: April 05, 2008, 10:05:22 PM »

Well here is my advice. It is based on a similar situation I observed recently.

You need to find the "tee" in the weeping tile that is attached to the line that runs to the "Dry Well". These dry wells tend to work in reverse. Put simply, if you dig a hole in the ground and connect a pipe to it, the hole will fill up from the ground around it and drain along the pipe back to the house. If you find the Tee you can block it off.
I would suggest that the easiest way to find it is to dig a hole at one of the back corners of the house (if that is the wall the dry well is on) and expose the weeping tile. Have a company with a remote camera find the tee connection to the dry well. Dig a second hole at the tee. Block the tee and then dig a bit deeper and tunnel under the footing to the inside.
Break the floor and install a sump pit at the corresponding location on the inside of the basement. Make sure you connect the exterior weepers to the new sump pit. Use flowable sand mix concrete to fill in the void between the "under footing" pipe (non-perforated) so you perserve the support for the footing.
Also perforate the sump pit liner with about 40 (3/8") holes.

This should take care of the foolish mistake made by the builders and the township for allowing it to be built that way to begin with.
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