Blow out or Use the pink stuff my personal review

Use the KISS method. With pump off, just open all faucets, open low-point drains, and water tank drain, then let it sit until all the water quits running out. Don't forget the toilet bowl sprayer, and the outside shower valves also. Drain and bypass the water heater. After it quits, all the water lines will be as empty as if you had blown them out. Pump in the antifreeze, pour some in the drains, and you are done. Don't forget the water heater.