When the pool person back washes, it floods the pump room. It used to have a short piece of backwash hose to the drain which is pretty much right under the outlet (about 6-8 inches above). A few years back, they actually cut a hole in the brick wall to allow it to run out of pump room but its pretty messy. If my memory is correct (may not be) it wasn't always this way (lived across from pump room for 35+ years). Pool person said backwash hose won't help. Does this sound normal? Also can the amount of water released during back wash be controlled or is it just on and off?