Seibchef Posted November 1, 2021 Report Share Posted November 1, 2021 We de-winterized our RV up to the point of draining the holding tanks this spring. The tanks currently hold a small amount of water the anti-freeze from the rest of the system. They were not drained because we had mechanical problems and then family health issues and were unable to use the RV. Can I leave the tanks as they are? What should I do with the rest of the system? Quote Link to comment Share on other sites More sharing options...
Kirk W Posted November 1, 2021 Report Share Posted November 1, 2021 I would just drain the tank an leave it empty all winter. Quote Good travelin !...............KirkFull-time 11+ years...... Now seasonal travelers.Kirk & Pam's Great RV Adventure Link to comment Share on other sites More sharing options...
ms60ocb Posted November 1, 2021 Report Share Posted November 1, 2021 Where you located? Yes drain your tanks for two reasons prevent Freezing and start out fresh some day. Did you drain the hot water heater? Did you winterize spray nozzles. I didn't and the kitchen sink was almost impossible to find a match. Clay Stay Healthy Quote Clay & Marcie Too old to play in the snow Diesel pusher and previously 2 FW and small Class C Link to comment Share on other sites More sharing options...
Ray,IN Posted November 1, 2021 Report Share Posted November 1, 2021 . In the tank a small amount does no harm when it freezes, but in the valve body your diluted mixture will freeze and burst your drain valves. Only a few brands state it in OK to dilute their RV antifreeze. Problem is, you don't know the mixture percentages in your tanks. Do as Kirk said and drain them. RV antifreeze is non-toxic and may be drained onto the ground. Quote 2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG retired;Good Sam Life member,FMCA ." And so, my fellow Americans: ask not what your country can do for you--ask what you can do for your country. John F. Kennedy 20 Jan 1961 Link to comment Share on other sites More sharing options...
Seibchef Posted November 3, 2021 Author Report Share Posted November 3, 2021 Thanks everyone. With you, and opinions from friends and family, it looks like I'm going to drain the tanks today. The hot water heater and water supply tank have already been drained. Quote Link to comment Share on other sites More sharing options...
bruce t Posted November 7, 2021 Report Share Posted November 7, 2021 We left our motorhome at a dealer storage lot. Did so for years. They always took care of the winterizing. Put a sticker on the windsheild to indicate that it had been winterised. One year we returned and when we turned on our pump it ran continuously. On inspection they had left water in the lines. The hard freeze during winter split many lines where they joined or turned. At elbows. Moral is not only drain your tanks but also your lines. (FWIW the dealer replaced all out lines no charge). Quote Link to comment Share on other sites More sharing options...
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