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Old 11-07-2015, 10:29 AM   #1
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Just How Much Water??

after flushing the black tank just how much clean water are you supposed to leave in the tank? is there a general rule? what is the best method to do so? and how do u verify the level other than the elec gauge? (also i am putting a blue tab in the tank) thanks
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Old 11-07-2015, 10:46 AM   #2
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No Rule,just close discharge valve and allow 1-2 Gal.to enter,just enough to (Slosh Around) with whatever (Concoction) you add! Youroo!!
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Old 11-07-2015, 11:02 AM   #3
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Just make sure you add enough to fill the drain pipe and a little to slosh around with your tank chemicals. If you don't then all the chemicals will be down in the drain pipe and doing very little.

Now, how do you know and how do you do it? Do you have a tank flush built in? If yes, then close the black valve and let the water Ron into your tank flush for 30 seconds or so. This should be enough to fill the drain pipe and put in little in the tank. When you add your chemical just fill the bowl first. That should cover it.

No black tank flush, then buy one of these to force water into black tank before shutting valve..
Camco RV Dual Flush Pro - Walmart.com
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Old 11-07-2015, 12:10 PM   #4
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I usually add about 3 gallons along with the chemicals I use.
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Old 11-07-2015, 12:55 PM   #5
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Since we usually gather up trash about the same time as we dump the tanks, I just fill the bathroom trash can with water and spouse dumps into the open toilet, along with chemicals, after I close the outside valves. Likely 2 or 3 gallons. If full hookups, I use the built in tank flush to fill for 30 or 40 secs. My valves are located at the tanks and operate with extended controls, so not much fluid lost to connecting pipe.
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Old 11-07-2015, 12:56 PM   #6
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Quote:
Originally Posted by dalford View Post
Just make sure you add enough to fill the drain pipe and a little to slosh around with your tank chemicals. If you don't then all the chemicals will be down in the drain pipe and doing very little.

Now, how do you know and how do you do it? Do you have a tank flush built in? If yes, then close the black valve and let the water Ron into your tank flush for 30 seconds or so. This should be enough to fill the drain pipe and put in little in the tank. When you add your chemical just fill the bowl first. That should cover it.

No black tank flush, then buy one of these to force water into black tank before shutting valve..
Camco RV Dual Flush Pro - Walmart.com

Just flush the toilet a number of times to add water to tank........If you are moving from CG to CG the sloshing will do the job Empty when you arrive at CG!!!!!
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Old 11-07-2015, 01:17 PM   #7
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I live in farming country so I can dump at home. After flushing really good, I fill the black tank up and let it set until the next trip. Dump that and add 1 gal and chemicals.
Not possible for everyone, but I keep everything in the black tank soft.
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Old 11-07-2015, 01:51 PM   #8
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After I drain and douche the tank. I put my tst in the toilet and flush that so it goes directly to the valve,,,thus, the lubricants in the chemical are right there at the valve. Then I put more tst with about 1/2 a bowl of water in the toilet and let her rip. Just remember,,,,,water is a black tank's best friend.....don't try to economize on the amount of water you flush down. I did when I was a newbie 11 years ago, and I had one hell of a time getting the pyramid out of the tank.
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Old 11-07-2015, 07:31 PM   #9
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I read somewhere that you are not suppose to run black tank flush with valve closed? ?
What is correct?
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Old 11-07-2015, 07:39 PM   #10
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Hdmtnrider....the reason for that is ,,,,if you walk away from it,,,,,,and set side tracked......you'll cry crocodile tears when it comes up out of the toilet and floods your RV. I shut mine and douche it, but I stand right there and make sure I don't go off and get side tracked. It cleans the walls of the tank even better if you do it this way. But make darned sure you don't turn your back on it. When I do it, I sit next to the toilet with the toilet flush open....when I see it starting to enter the riser....I got outside and open up the drain. It does a better job that way,,,,and should be cleaned like this every once in a while. But pay attention to what you're doing.
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