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Old 11-26-2010, 09:19 AM   #1
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Running sump pump


We have to run our sump pump outside. We have had everyone say something different on how it needs done. One says run out the back another says in order to get the slope do it out front. My question is what keeps pcv pipe from freezing once ran outside a small portion will be exposed rest underground. When it or if it does freeze what keeps it from line backing up and ruining basement ceiling or get on floor? There would be no place for water to go if pipe is froze so it would have to go somewhere.

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Old 11-26-2010, 09:27 AM   #2
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Running sump pump


Mine comes out about 2-3" above grade, makes a quick 90 degrees down into the soil, down about 20" and then laterals out about 15' underground til it surfaces at grade level (ground slopes down from wall to final discharge location). It has never frozen in 17 years. Not sure why or what happens if you have frequent pumping (mine is infrequent). I live near Philly so we don't get constant way below freezing for months on end like some places might.

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Old 11-26-2010, 12:10 PM   #3
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Running sump pump


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Originally Posted by kikipauw View Post
We have to run our sump pump outside. We have had everyone say something different on how it needs done. One says run out the back another says in order to get the slope do it out front. My question is what keeps pcv pipe from freezing once ran outside a small portion will be exposed rest underground. When it or if it does freeze what keeps it from line backing up and ruining basement ceiling or get on floor? There would be no place for water to go if pipe is froze so it would have to go somewhere.
Ideally, your "sump should dump" the discharge as soon as it exist the house into underground 4" corrugated piping or pvc. Long lengths of 1.5" PVC can freeze, but then again, you ask where is the water coming from if a sump pump is pumping water when it's freezing outside.
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Old 11-26-2010, 12:38 PM   #4
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Running sump pump


Pitch the pipe exiting the wall downwards. Then use a 90 degree elbow to take the water down to the underground piping. Running water does not freeze and the pitch should drain any piping leading to the elbow.
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Old 11-27-2010, 01:38 PM   #5
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Running sump pump


There is no sure fire way to be sure the outlet pipe doesn't freeze up but if the water does not collect anywhere in the pipe (no dips) then the chances of freezing are very small.

If you have a heating cable (roof heating cable should do) running inside the pipe from end to end then it won't freeze.
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