I think it depends upon how the tanks are drained. Unless you actually disconnect some hoses, it is difficult to know that you are draining them completely. An alternate procedure is to run the freshwater pump until the faucets pretty much stop spitting, then put a couple of gallons of antifreeze into the tanks and pump that through to take care of any residual water that may remain. If you close your thru hulls as the last of the antifreeze is draining from the sinks, they’re protected as well.
I save the vodka for getting me through the winter AFTER I winterize ☺. Mike C&C 30 mk II Lake Pend Orielle, Idaho I'm curious why a lot if antifreeze is needed. If the water tanks, heater and plumbing are drained as dry as gravity will make them before inserting the antifreeze, I find it only takes 1/2 a gallon or so to winterized the fresh water system on the Landfall. Rich Knowles Indigo. LF38 Halifax
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