Yes, close sparge (recirculation) valve and it will take it all the way down into the bottom nipple.  I usually put in 100 gallons or so, open sparge again and then close to clean out those lines, then empty out again.  Remember the first 100' of spraying will be full strength chemical, so put it in a good spot.  Then I go back to yard and put in another 100 gallons and fill 30 gallon rinse tank, empty 100 gallons again.  Then I usually open up a coupe filters to make sure they aren't dirty, take off the last nozzle for each section and blow the 30 gallons out.  

You don't have the big recirculation valve on that dumps to the top of the tank do you?