The sales guy for the softener company suggests draining the back flow from the softener into same spot as the washing machine. My concerns with this are that the brine will then be pumped out of the house by the sewage pump in the basement. Even if the brine backwash does not eat the pump it will work it more than necessary. Guy says no other option. Can I suggest installing it like a dishwasher? Can a trap and dishwasher style connector (3/4") be added in anywhere that does not drain into the pit? Here is a picture of the basement plumbing. If more info is required let me know.