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Old 11-03-2016, 02:32 PM   #15
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Sweetbriar,

I believe that dumping the antifreeze in the tanks and driving for the monthly generator run (before the freeze) will agitate the tanks enough to mix.

No place to dump a tank in suburban Minneapolis, unfortunately.
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Old 11-03-2016, 11:59 PM   #16
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You need to be sure the dump valves have anti freeze, not windshield washer fluid. Your black and grey tank valves do not like to be dry or have untreated water. They can dry out damaging the seals or freeze damaging the pipes when the ice expands. So even if you completely dump your tanks go back and add some antifreeze, at $5 a gallon, a couple of gallons are cheap insurance for the spring.
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Old 11-04-2016, 05:40 AM   #17
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I would completely dump both tanks and then pour at least a gallon of RVA into each tank. If you just add AF, there is no guarantee that it will effectively mix with whatever's in the tank already. $25 in antifreeze would seem very cheap compared to plumbing issues in the spring. I, too, am a cheapskate. But gotta know your limitations.
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Old 11-04-2016, 08:48 AM   #18
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I have a Valterra SewerSolution System for just that, I have a 60 foot hose on the Sewer Solution and just pump and flush it in to my septic tank 60 feet away. When available I dump my tank with stinky slinky but when it's not, or there is an hour long line at the dump station leaving the campground or just and small load I use the SewerSolution. the leave it open all winter, I still pour RV antifteeze in the stool.
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Old 11-04-2016, 11:00 AM   #19
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I have a Valterra SewerSolution System for just that, I have a 60 foot hose on the Sewer Solution and just pump and flush it in to my septic tank 60 feet away. When available I dump my tank with stinky slinky but when it's not, or there is an hour long line at the dump station leaving the campground or just and small load I use the SewerSolution. the leave it open all winter, I still pour RV antifteeze in the stool.

You really do not want those seals to dry out, best to leave the valve closed with some RVA in the tank.
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Old 11-04-2016, 11:31 AM   #20
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You wouldn't want to have your black tank valve freeze up, expand and break once it thaws out, would you?

Dump in the cheap stuff and don't worry about it!

Dr4Film ----- Richard

Yes the area just above the gate valve would worry me!


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Old 11-04-2016, 01:17 PM   #21
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rv black tank

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I see. Makes sense. I do not know all the configuration and piping to the output valves.
if you don't use rva you will crack your drain pipes & or valve
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Old 11-04-2016, 01:18 PM   #22
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your valves & drain pipes will crack or break without rva
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Old 11-05-2016, 07:54 AM   #23
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Most winters I have had a little leftover in the black tank. I live in WNY where it does occasionally drop below 0 deg F. Never had a problem. Do have residual in the tank from filling the traps and system. Did freeze a water valve once, that is why I preach about operating valves to get antifreeze in the core. ;-)

FWIW I don't complain about the belt and suspender approach as I use it myself. I do point out that overkill costs money that may be better spent elsewhere. That is why I try to get the most cost effective approach. Food safe in the water pipes because I drink from the tank. Deicer because it is intended to be diluted with water. Cheap windshield washer fluid because it is cheap and will get dumped if I am thinking about using the toilet on the road while escaping winter. ;-)
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Old 11-05-2016, 08:15 AM   #24
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Minnesota 51,

Have you tried this site to locate a RV Dump?

Minnesota – RV Dump Stations
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Old 11-05-2016, 08:31 AM   #25
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Minnesota 51,

Have you tried this site to locate a RV Dump?

Minnesota RV Dump Stations
Thanks!
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Old 11-05-2016, 12:36 PM   #26
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Yes..the issue is if it drys up and/or can freeze. Couple/three gallons of RVA should solve the problem.
X3, save your money.
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