CaptainMark
Member
We just bought a 2021 Mallard M210RB from a private owner and it is winterized. We plan to use it prior to winter (we're in Northeast) and decided to de-winterize it myself. The major 3-hr obstacle of an simple endeavor was finding the water pump and that elusive winterization valve. In this model, that valve is under the bottom kitchen drawer. Remove the drawer by pressing the pins on the slides and the water pump is right there. Open the inline valve to for water flow, close the open-ended winterization hose to prevent the system from sucking air. Hope this helps someone in the future. Peace, CaptainMark