It is most likely not a problem.
From what you said, it seems that your house is situated on a hill. A 6-7 degree slope is so steep that any water would probably quickly drain away from your house down the hill. I would also trust what the owner said about not having to install the sump pump. I just can't imagin how anyone could make it up.
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回复:It is most likely not a problem.
-ppj-
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01/16/2010 postreply
23:26:39