We don't use the ice maker because of the trouble it is to winterize it - learned the first year what a royal pain for as little as we actually use the coach. That said, per our manual, we got a little more than a gallon of water from the water tap on the refer door when blowing it out with air. I'm sure some of that was also from the water line running from the sink to the refrigerator. We ran the ice maker through three cycles with air pressure before we got misting and then another two cycles before the misting seemed to clear up some. Given the amount of water we got out of the thing, we decided not to use the 'pink' stuff for the refer - after blowing everything out we just shut off the valve under the kitchen sink cabinet and have left it alone the past two years.
For the washing machine - it seems to take 3/4 to a full gallon of pink stuff to do it by the manual. We have to fill it using the 'warm' water setting and let it fill to about 1/2 way in the tub. Seems much higher than what we normally see when actually washing but that is what the Splendide manual has us do. After than we drain, spin, and leave it alone until dewinterizing.
As there are low spots in the pex along the various runs, I don't trust that all of the water is blown out completely therefore I still put RV antifreeze in the lines and, of course, the P-Traps and toilet.
Hope this helps some.
