We do not recommend routing the backwash from your water softener into a Jet system, or any other type of biological treatment system. The concentrated sodium chloride and other chemical compounds that are introduced into a Jet system while the softener is backwashing will kill off many of the beneficial bacteria that live in your treatment system. If it is at all possible, route the water softener backwash to an alternate drain line. However we recommend that you check with your local health department before installing or altering existing drain lines.