lison
Forest Lake, MN
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Joined: 02/28/2006
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Hi Folks. 'Been RVing for a dozen years in the freezing north, and never really worried about this, or seen anything written or found searching. Do you think the black and gray should be completely drained, or tank chemicals in as usual (plus whatever antifreeze gets in there from adding to P-traps)? Do you think it's good for the O-rings to dry out over winter if empty? I have done both. Have not had ever the outlet pipes freeze or break, but have had them start leaking, and replacing them was not a fun job. Would rather not have to do that again. Any advice appreciated. Thnx. -Luther
2017 Flagstaff Microlite
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2oldman
NM
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plenty of youtube videos on this
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colliehauler
Mc Pherson KS USA
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Joined: 01/27/2004
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I just leave the drains open to the dump station until I've completed winterizing. When done I close the valves and disconnect the hose. Anything that flows into the tank will be RV antifreeze. My seasonal has experienced -40 degree temperatures without any issues. I leave the faucets open as well for expansion.
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Dick_B
Palos Heights, IL USA
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I usually add one gallon of pink stuff to each tank after all of the other winterizing tasks are completed. It doesn't cost much and is cheap insurance. Valves closed of course.
Dick_B
2003 SunnyBrook 27FKS
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lison
Forest Lake, MN
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Thanks for the responses. That's what I was looking for. 'Have always done my own winterizing, and have read a thousand lists, made my own, and watched videos, but never seen anyone address the black and gray tanks.
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Lwiddis
Cambria, California area
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I’m in the “drain ‘em and forget “em” camp.
Winnebago 2101DS TT & 2020 Chevy Silverado 1500 LTZ Z71, WindyNation 300 watt solar-Lossigy 200 AH Lithium battery. Prefer boondocking, USFS, COE, BLM, NPS, TVA, state camps. Bicyclist. 14 yr. Army -11B40 then 11A - (MOS 1542 & 1560) IOBC & IOAC grad
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ksg5000
Oregon
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Joined: 06/30/2008
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Under ideal circumstances I would dump - but that's not life in my world. I put a jug of pink in both tanks and have had no issues for 20+ yrs. My black water tanks is mostly pee which is tough to freeze even without the pink stuff.
Kevin
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Mel Stuplich
Wausau, WI
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Joined: 03/21/2017
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Dick_B wrote:I usually add one gallon of pink stuff to each tank after all of the other winterizing tasks are completed. It doesn't cost much and is cheap insurance. Valves closed of course.
I find that a quart in each waste tank is plenty.
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kellem
Shenandoah valley,VA
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Plenty of room for expansion plus the residual of antifreeze during winterizing.
Those tanks pose no threat of freezing
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JIMNLIN
Oklahoma
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Joined: 09/14/2003
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I have a dump at home so nothing ever sits in my tanks very long. I open the drains and take the caps off and place piece of window screen over them to keep the critters out.
"good judgment comes from experience, and a lot of that comes from bad judgment" ............ Will Rogers
'03 2500 QC Dodge/Cummins HO 3.73 6 speed manual Jacobs Westach
'97 Park Avanue 28' 5er 11200 two slides
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