you house must be pretty old about 1870?? or so
Somewhere out in your back yard their is probably an
old brick lined 2000gallon systern probably capped off and buried and
now full of debris.
Look for an old round steel lid ...looks like a man-hole cover
they used to take the rianwater from the gutters and use it as
a back up system for the house water supply... and for laundry
uses in the basement---it was rain water soft----
look down in the basement and you will most likely find some old pipies
that are cut off at the back wall.
or perhaps you still have an old
hand pump sitting in an old concrete laundry tub down in the basement
that is probably what its all about
how they pumped it up to the second floor is anybodies guess.