How I finally winterized the Whirlpool icemaker
I finally got my Whirlpool icemaker winterized with the pink antifreeze.
One problem was that the icemaker line was incredibly long, since it started under the **bathroom** sink. (My kitchen is on a slide but the bathroom isn't, so this line has to be extra long to be able to flex -- a really bad design.)
I've wanted to switch it to the kitchen sink, so I cut the icemaker line under the kitchen sink and attached a 1/4" compression fitting with a female garden hose fitting (found one already made and didn't have to build it up!). Then, I took an external Camco Pur water filter unit and removed the filter and replaced it with pink. Attached the filter housing to the hose fitting. Then, I put pressure on the filter with my compressed air.
The next thing to do is to turn on the fridge and let this sit overnight. You need to get it to go through one or two ice-cube cycles to make sure the pink gets to the fridge.
An alternative might be to just put air pressure on the icemaker line and wait to hear it hiss in the freezer. But, it never got that far for me, probably because i still had the long line from the bathroom sink and it would stop whenver it thought it had enough fluid to make a batch of ice. I guess if I left the pressure on for a couple of days with the freezer running, I could keep emptying the icecube tray and when it stopped filling, I'd know that the line was clear. I'll try that next year.