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Old 03-22-2021, 09:03 AM   #1
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Is this a 'good' thing?

So, today I REALLY wanted to clean out my black tank, so I emptied it out and then started refilling it with clean water from the back flush hose and thought I'd really get it spiffed up so I dumped in quite a bit of dawn dish soap.

I set my timer for 8 minutes, kind of a guess as how long it would take to fill the black tank, and went back to work.

My alarm hadn't gone off yet, but I thought I'd check, so I lifted the toilet seat and looked down the hole with my flash light. Yikes! Soap suds popped up and were right near the top! "Okay, must be good".

So I went out and dumped the tank and when I went over to the other side of the RV I noticed soap suds coming out my vent on the roof!!!!!!

I'm assuming that's a good thing? Meaning the vent is working?

Here's some pics:
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Old 03-22-2021, 09:12 AM   #2
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No problem at all , now you have a clean vent!
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Old 03-22-2021, 09:13 AM   #3
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Kind of like putting soap in a fountain, and Iím sure itís cleaner than it was. Iíd give the roof and exterior a good wash because those suds did come from your black tank.
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Old 03-22-2021, 09:16 AM   #4
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Originally Posted by R.Wold View Post
Kind of like putting soap in a fountain, and Iím sure itís cleaner than it was. Iíd give the roof and exterior a good wash because those suds did come from your black tank.
Yes, thank you, that's on my to-do list, as we prepare to head back home.

Sure was a bit unnerving seeing the suds come out of the vent, but now I know which vent is which! LOL!
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Old 03-22-2021, 05:13 PM   #5
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You may still get a lot of suds the next time you use the black tank. I think I'd try filling it again and dumping it to rinse out more of the soap.
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Old 03-22-2021, 05:30 PM   #6
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You may still get a lot of suds the next time you use the black tank. I think I'd try filling it again and dumping it to rinse out more of the soap.
Why rinse the soap out? Just leave it, not harming anything.
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Old 03-22-2021, 05:33 PM   #7
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I use Dishwasher liquid in my Black tank - cuts the grease.......
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Old 03-22-2021, 06:17 PM   #8
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I use Dishwasher liquid in my Black tank - cuts the grease.......
Hmm, not a bad idea. I used Dawn, which I think does the same thing.

I'll probably be dumping it two more times before we leave to head back, so yeah I think leaving as much soap in there as possible is a good thing. In fact just before we leave and after we dump, I'll probably add another half cup or so. That way with all the rocking around as we travel down the road it should FINALLY clean off those old sensors.

Ah, the joys of owning a 24 yo rig. Can't wait to update...well, a little anyways...say from a 1997 to a 2007?...that'd be good.

Thanks all!
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Old 03-22-2021, 06:27 PM   #9
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"Grease in the black"....think I need to hear more about how this happened????
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Old 03-22-2021, 06:32 PM   #10
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WHY?????????

Everything will just be filled with Poop again - Now you need to wash and wax the Coach because you cleaned all the wax off with the dish soap.

Sorry but it's a BLACK tank!


JMHO,
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Old 03-22-2021, 06:34 PM   #11
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Use a little Calgone.
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Old 03-22-2021, 06:41 PM   #12
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Whenever I dump my black tank I refill it with fresh water and re dump a couple of times to rinse it out. When I dump prior to traveling I pour about a half bottle of Dawn anti bacterial dishwashing liquid in the tank, via the toilet, and leave about a 1/3 or 1/2 tank of water in the tank. As I am driving the tank is getting a good wash. When I get to my next location I immediately flush and rinse a couple of times to get all the suds and gunk out and start with a fresh tank for that new location. If you donít flush at the new location all the gunk will just resettle on the bottom and sides of your tank. Always rinse out the suds after a cleaning.
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Old 03-22-2021, 06:45 PM   #13
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"Grease in the black"....think I need to hear more about how this happened????
I was just going to say the same thing! Where is the grease coming from?

Now if you were talking about the gray tank I could understand.

Here is a picture of my black tank floor after 16 years of holding ...... well you understand. BTW, this tank has never seen any commercially available "cleaning agent" besides a healthy dose of Dihydrogen monoxide.
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Old 03-22-2021, 07:41 PM   #14
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Man, what a waste. I just empty the ice bin in the toilet when I break camp for home along with about 5 gallons of water and let the ice scrub the tank. If I think I have a clogging issue I just just put some calgon or epson salt in the tank to wash away it's worries.
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