Winterizing 53 Hatteras AC units

[Jack]

First time I'm thinking of winterizing my AC units and did not know if you do all the four units at once or individuality. I only have one sea-cock for all four units.

[saltshaker]

They should all drain once you take the hose off the seacock. You may need a pump to pump to antifree in. If the pump isn't flooded it won't prime. If you can get the hose above the pump you can pour it in with a funnel and run one unit so the AC pump turns on.