Good Sam Club Open Roads Forum: Travel Trailers: Winterizing black and gray tanks
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 > Winterizing black and gray tanks

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lison

Forest Lake, MN

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Posted: 10/13/21 09:24am Link  |  Quote  |  Print  |  Notify Moderator

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
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2oldman

NM

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Posted: 10/13/21 09:46am Link  |  Quote  |  Print  |  Notify Moderator

plenty of youtube videos on this

colliehauler

Mc Pherson KS USA

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Posted: 10/13/21 10:06am Link  |  Quote  |  Print  |  Notify Moderator

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.

Dick_B

Palos Heights, IL USA

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Posted: 10/13/21 10:33am Link  |  Quote  |  Print  |  Notify Moderator

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
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lison

Forest Lake, MN

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Posted: 10/13/21 10:53am Link  |  Quote  |  Print  |  Notify Moderator

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.

Lwiddis

Near DVNP, California

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Posted: 10/13/21 11:03am Link  |  Quote  |  Print  |  Notify Moderator

I’m in the “drain ‘em and forget “em” camp.


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ksg5000

Oregon

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Posted: 10/13/21 11:04am Link  |  Quote  |  Print  |  Notify Moderator

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

Mel Stuplich

Wausau, WI

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Posted: 10/13/21 01:51pm Link  |  Quote  |  Print  |  Notify Moderator

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.

kellem

Shenandoah valley,VA

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Posted: 10/13/21 06:44pm Link  |  Quote  |  Print  |  Notify Moderator

Plenty of room for expansion plus the residual of antifreeze during winterizing.
Those tanks pose no threat of freezing

JIMNLIN

Oklahoma

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Posted: 10/13/21 06:47pm Link  |  Quote  |  Print  |  Notify Moderator

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

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