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Old 08-28-2016, 01:48 PM   #1
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Waste tanks --- full or empty?

I couldn't find a link addressing this. When we leave the RV at the campground and head home, we dump all tanks and flush black tank. I'm hearing a strain of thought that recommends dumping, cleaning, then filling with clean water and letting it sit until we return so the 'stuff' in the tanks don't dry out.
Any thoughts?



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Old 08-28-2016, 02:23 PM   #2
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I never refill my tanks with clean water or anything else after I dump when leaving a campground. I DO add 5 gallons or so of water to my black tank.
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Old 08-28-2016, 03:01 PM   #3
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Thanks, Mr. Dan. I never thought about leaving it empty would dry out the residuals. 5 gallons sounds good to me.


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Old 08-28-2016, 03:38 PM   #4
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I also do the same as Mr. Dan.


I don't think it would hurt to refill the tanks but it's added weight (not a problem for most people) but then you have full tanks to deal with at the start of your trip.
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Old 08-28-2016, 05:05 PM   #5
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We always dump, rinse, then add a few gallons with chemicals to the black tank. Also dump a little of the yellow gray tank deodorizer in all the drains.
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Old 08-28-2016, 05:35 PM   #6
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Great tips! Thanks!!


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Old 08-28-2016, 05:52 PM   #7
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Tanks

We dump rinse and dump.

When the tank is drained we add a few gallons and some Tank Tech RX. All seems good using this method.
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Old 08-29-2016, 08:01 AM   #8
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I always leave a few gallons of water in the black and gray tanks during the season with 1 laundry load of detergent and 1 laundry load of Calgon water Softener.

When I winterize, I add 1/2 quart of RV-Digest-It (by Unique) to each tank and fill them to the top and let them sit for 72 hours or more; then dump and turbo rinse (I installed one on my gray tank, too).

My tanks are link new, don't smell, and (with Horst probes) the tank monitoring systems work flawlessly.
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Old 08-29-2016, 08:06 AM   #9
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X2 on dump completely when leaving. Once home I add 3-4gals of water and a an oz of Rid-x to help decompose anything that may be left. When I winterize in the fall, I add 10 gal of water and some Odoban and let sit for a few days before I drain and winterize.
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Old 08-29-2016, 08:06 AM   #10
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After dumping at the campground, I dump 5 gallons of water into the black tank with laundry soap and let it slosh around on the trip home. I then drain it and fill it with water and drain it again; and store it with both gray and black tanks empty.

I use the geo method and never had issues with tank smell or dried waste in the black tank.
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