If the fresh water system is drained/dry, no need to put anything into it.
Keep that valve closed so no pink stuff goes into your fresh tank.
Before you proceed, have you by-passed your water heater and drained it????? Be sure to do this also. Please before draining the hot water heater turn off the pump, open a faucet, and let gasses out of the system. I darn near killed myself taking out the anode rod draining my water heater one year. Had NOT opened faucet to relieve gas pressure and that rod shot out like a missile when it got loose enough, went right over my shoulder next to my ear and ended up across the street from me. A close call to a potential serious injury.
Anyway, once your fresh water shut off from anti-freeze and your hot water heater drained and by-passed, use that valve on the pump to suction the anti-freeze right out of the bottles.
You should probably get two of those gallon jugs at minimum.
Start at outlets closest to pump and work away from there. Don't forget outside shower (if you have one) and be sure to let some anti-freeze drain into the drains and traps to keep them good for winter.
Be sure to do the toilet too. Anything extra down the toilet or drains goes into the holding tanks of course, and that does not hurt one bit.
Be sure to check your city water connection. There is a rubber washer with a screen on it there. Underneath you will find a white plastic plunger type valve, be sure to push on that and let any water there drip out too.
