Lotsa rain here in Boston has brought about 2 inches of water in my baseement. I own half of a two-family house, so my neighbor shares the foundation and basement structure. I've been in the house for a year; she's been here for 14 years and says that this happens ever few years - lots of rain in the spring brings in about 2 inches of water. We set up one of those "sits on the floor" pumps and pumped the water out into the street and away from the house; the 2 inches of water comes back in a couple of hours, even though the rain stopped yesterday. Sounds like a 'water table' issue to me.
Everywhere I read about installing a sump pump says that the hole ought to be around 2 feet deep or more. But I don't understand why a pit only a few inches into the floor wouldn't be enough. I mean, assuming that our basement floor (concrete slab) is relatively flat (and it is), as long as the intake of the pump was a few inches below the floor level, wouldn't that be enough to keep the floor dry? Do we really need a sump pit that's 2 feet deep?
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