I have water entering my sump pit at a point 8" below the basement
floor. The flow of this water is relatively strong after a heavy rain
and typically takes at least five days to reach a point where it no
longer seeps in at this point. I might note the water table is
unnaturally high in this area due to much above average precipitation
over the last four months.
The perimeter drain at my house sits on top of the footers and I have
been advised by the builder this positioning places the perforated
drain tile 4" below the basement floor. This drain tile is connected
to a hard PVC drain pipe and drains to daylight behind my house.
My question...theoretically speaking as I am reticent to unplug my
sump pump and test this particular theory... if my sump pump were not
working and the water level rose-- would the water level rise across
(under) the entire basement floor area and find its way into the
perimeter drain before attempting to enter into the floor, under the
I find that rain water near my house not removed by gutter downspouts
and the exterior grading is finding its way under my footers,
bypassing the perimeter drain, and eventually into the sump pit. I
understand the perimeter drain is there to primarily capture rising
ground water, but I was surprised recently during a heavy rainfall
that no water was exiting the aforementioned drain pipe. I dug down
where it is connected to the perimeter drain, rain a hose onto that
area, and the water ran down the drain pipe. Why rain water is not
entering the perimeter drain initially is somewhat confusing, but
perhaps the chosen positioning of this drain tile (on top of the
footers vs. along side) might have something to do with the fact rain
water seems to be aggregating into the water table and finding its way
under my basement.
Sorry for the digression... and thanks for your thoughts regarding
what should happen if my sump were not functioning relative to the
water level rising and potentially finding the perimeter drain before
finding my basement.