I did more research, and found out how to manually switch the Jandy valves, and kind of know how to blow out the Caretaker lines, but still dont know if it is ok to blow air through the DE filter ...
Pathfinder said:Id like to add an extremely important procedure for those with a sand filter. Just removing the drain plug will not sufficiently evacuate 90% of the water still in the sand filter. To remove the remainder is to use a high volume shopvac to blow the filter out through your backwash line. You place your dial to Rinse then place your vac hose on the line from the pump(leave you gauge and sight glass in while doing this). When blowing the air forces the water up and out. This procedure takes usually an extra 5-10 minutes but it will save your tank from freezing expanding then cracking.
scooperhsd said:Trying to blow the returns out is A) - difficult. B) and it won't stay that way very long.