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Old 06-01-2013, 02:24 PM   #1
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Crawl space water trench


I have a wet crawl space that gets standing water after a heavy rain. I just dug a sump pit and installed a pump. The water seems to naturally go toward the pit due to the grade of the land. I started to dig a trench inside the crawl around the perimeter of the house and planned to place perforated pipe and gravel, but this got extremely difficult fast. There is limited headroom and pushing out buckets of heavy mud are very difficult.
Is there a reason I could not just let the sump pit fill on its own and stop with the 12 ft or so of trench I already have?

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Old 06-01-2013, 04:37 PM   #2
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Crawl space water trench


No one here is there to see it so it's hard to say.
I would have started outside to see why the water coming in.
No gutters, grade not running away from the foundation.
Mulch pilled up againt the foundation.
Flower beds forming ponds.
Down spout to close to the house.

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Old 06-01-2013, 06:10 PM   #3
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Crawl space water trench


Generally when one has a sump pump are the perforated pipes in a trench necessary or will the water still find its way to the lowest point where my sump pump is located?

Yes we have new gutters, and have cleared away vegetation etc. I have a well, so I think it is just high water table.

Last edited by crescere; 06-01-2013 at 06:18 PM.
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Old 06-02-2013, 05:54 AM   #4
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Crawl space water trench


you have just discovered the 1st rule of water - it runs downhill

laboring in a still air hot space isn't fun IF wtr's doing as you say, let it go,,, just be sure your sump's large enough & follow all the other rules of wtr,,, would suggest you ONLY use a zoeller m-37 on a pump riser

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Old 06-02-2013, 02:36 PM   #5
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Crawl space water trench


Quote:
Originally Posted by itsreallyconc View Post
would suggest you ONLY use a zoeller m-37 on a pump riser

I assume that is a sump pump? I already bought a FloTec Water Cannon at HD and it is working well so far. What is a pump riser?
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Old 06-02-2013, 08:24 PM   #6
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Crawl space water trench


a device that raises the pumps intake off the sump's bottom a couple inches allowing sediment & soil fines to settle out of the discharge water,,, it therefore protects the pump's impeller & volute from premature wear,,, in simpler terms, less dirt pumped extends pump service life
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Old 06-02-2013, 08:29 PM   #7
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Crawl space water trench


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a device that raises the pumps intake off the sump's bottom a couple inches allowing sediment & soil fines to settle out of the discharge water,,,
Would a brick do?
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Old 06-02-2013, 08:44 PM   #8
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Crawl space water trench


yes, of course,,, just be sure the pump's torque doesn't cause it ( pump ) to fall out of position,,, don't use flexible pipe - use 1 1/2" sched 40 pvc w/ck valve about 8" above the pump outlet,,, drill a 1/8" hole about 2" below the ck valve, too

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