How to Winterize RV Dishwasher 1️⃣ Make sure your kitchen sink lines already have antifreeze. There should be no water coming out of the faucet when you turn on either the hot or cold water, only pink antifreeze. 2️⃣ Pour antifreeze into the bottom of the dishwasher until it’s covered, about 1/2 gallon. 3️⃣ Run a rinse cycle. When it finishes, antifreeze will have passed through the freshwater lines and pumped out the drain, completing the winterization. 📖 Learn how to winterize your RV step-by