well, besides the landlord business, I been a home builder over 10 years, also own an interest in a concrete/excavating business, so I know a few things about foundations.
usually before the house was build, there are footers, and along them footers, there are underslap drainage systems, which make up of perforated pipes or so call weeping tiles, these tiles are surround by stone or gravel and sand, not soil, they are interconnected, and parallelly run for load balance, just incase one of them is clogged, all the under water collected thru these tiles usually goto a sump pump, and pump out to surface ground, but in your case, instead of a sump pump, they connected to the storm water line.
After the concrete walls are form, the outside perimeter tiles are then connected to underslap tiles, also important that the house should only back fill with gravel and sand, not dirt, some builders try to cut corner on that, which can cause flood later, this way there wouldn't be standing water surrounding the house.
now, there is not thing wrong with gravity feed system like you have, sewer lines are all done like that, but the problem is sewer lines are seal and tiles are not, over time, soil can get in the tile system and finally clog the line and eventually flood the basement.
now knowing this much, you now need to determent where is all these water coming out from, is it from where the wall joint the floor? or from concrete saw lines in the floor?
from the picture, these look like they are additional plumbing for future bathroom sewer, should have nothing todo with the tile system, the reason the water do down to it is because it is connect to the sewer system, which technically is illegal to drain surface water to sewer line.
after you can determined where the problem is, maybe we can find a solution to it.
is this your primary home or a rental?
Water is the common enermy of all constructions...
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thank you! I add more photos for analysis, insurance company did
-timetravel-
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04/26/2009 postreply
10:07:22
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more photos, jy and other helpful people, thanks (图)
-timetravel-
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04/26/2009 postreply
10:33:52
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I have never seen PVC connect to the tile system..
-jy101-
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04/26/2009 postreply
11:25:06
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thanks, JY the contractor appointed by the insurance company
-timetravel-
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04/26/2009 postreply
15:10:37
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you can not just put a sump pit in without fix the problem,
-jy101-
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04/26/2009 postreply
15:51:58
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thanks, jy, you rock. I realize because it is
-smallking-
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04/26/2009 postreply
17:16:10
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backwater valve is for sewer backup, how handy are you?
-jy101-
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04/26/2009 postreply
17:42:57
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i am not handy. I do have a few handymen, but they don't
-timetravel-
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04/26/2009 postreply
17:50:38
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haha, me neither, I can't even pound nail....
-jy101-
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04/26/2009 postreply
18:06:06
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did you mention you own construction company for 10 years??
-timetravel-
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04/26/2009 postreply
18:11:29
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yes, I was in IT after college, doing rental on the side.
-jy101-
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04/26/2009 postreply
19:30:12