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04-05-2020, 01:37 PM
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#1
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Member
Join Date: Feb 2020
Posts: 30
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black water clog cleared, how to follow up
My son and his family are staying in my Cherokee full time while building a small home. Been in there a month, everything has been good. But this week, one of them forgot to close the black water valve after dumping and flushing, took them a week to figure out something was wrong. After researching the archives here, we filled the tank with a hose into the toilet, and got a successful dump. Then flushed with the built in flush hookup. Did this twice, still had some solids and paper come out the second time. I guarantee they won't ever make that mistake again, the clearing process wasn't pleasant at all!
Our plan is to just start using the toilet as usual again. We have Happy Camper and will use that. I'm confident that any solids left will get cleared just by a few cycles of normal use. But they are concerned there might still be some solids in the bottom of the tank, even though the valve was only open for one week. Any other ideas on how to follow up and make sure all the solids are gone? Everything seems OK now, but making additional fill/dump/flush cycles won't hurt if it's called for.
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04-05-2020, 01:58 PM
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#2
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Senior Member
Join Date: Apr 2016
Location: Cedar Creek Lake, TX
Posts: 3,484
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Get a spray wand, attach to a water hose, and flush the tank reaching down through the toilet. Twist and turn the wand to spray into all corners.
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Cedar Creek Lake, Texas
2019 Keystone Loredo 290SRL
2019 Ram 2500 4x4 Cummins crew cab
Andersen hitch
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04-05-2020, 02:09 PM
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#3
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Senior Member
Join Date: Nov 2012
Location: Mount Laurel, New Jersey
Posts: 9,230
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I have one of those clear sections with a flush attachment. I added a gate valve and just that to back fill either tank several times to flush. Does a better job then the built in tank flush. First time I did it was surprised what came out of the tank after dumping and on board flushing.
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2012 SunSeeker 3100SS Toad-1962 Futura Average 100 + days camping
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04-05-2020, 04:54 PM
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#4
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Maintenance Engineer
Join Date: Apr 2020
Location: Verdi, NV and Macon County, TN
Posts: 190
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Camera
I have a camera on a long flexible shaft with a LED light built into the tip of it. They were kind of pricy when they first came out but now you can get them for cheap. The one I have is an early generation Milwaukee brand and it works ok, but you won't want to use it for taking wedding photos. It's nice for seeing into all kinds of places you'd normally have no way to see.
They sell some expensive ones that you can even steer around corners and HD resolution, but the cheap ones work good enough to see what you really don't want to see down in that tank. If I needed to buy another one I probably wouldn't go so cheap next time, the resolution isn't very good and it's hard to tell which way is up sometimes when you're looking at the screen.
RidX will slowly dissolve away what's built up in there, but pool acid eats stuff up fast. I wouldn't leave pool acid in to long though, it'll eat at the metal on your sensors.
Edit: The one I have is a Milwaukee 2309-20 that takes a 9V battery, I don't recommend that one, I kind of keep hoping it breaks so I have an excuse to get a better one.
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04-05-2020, 06:13 PM
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#5
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Member
Join Date: Feb 2020
Posts: 30
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Quote:
Get a spray wand, attach to a water hose, and flush the tank reaching down through the toilet. Twist and turn the wand to spray into all corners.
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We actually have one, will do this.
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04-05-2020, 06:28 PM
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#6
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Senior Member
Join Date: Jul 2017
Location: North of Seattle, WA
Posts: 17,332
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Quote:
Originally Posted by Ampdraw
I have a camera on a long flexible shaft with a LED light built into the tip of it. They were kind of pricy when they first came out but now you can get them for cheap. The one I have is an early generation Milwaukee brand and it works ok, but you won't want to use it for taking wedding photos. It's nice for seeing into all kinds of places you'd normally have no way to see.
They sell some expensive ones that you can even steer around corners and HD resolution, but the cheap ones work good enough to see what you really don't want to see down in that tank. If I needed to buy another one I probably wouldn't go so cheap next time, the resolution isn't very good and it's hard to tell which way is up sometimes when you're looking at the screen.
RidX will slowly dissolve away what's built up in there, but pool acid eats stuff up fast. I wouldn't leave pool acid in to long though, it'll eat at the metal on your sensors.
Edit: The one I have is a Milwaukee 2309-20 that takes a 9V battery, I don't recommend that one, I kind of keep hoping it breaks so I have an excuse to get a better one.
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MOST solids will build up in the drop zone. I've never found the need to "borescope" my black tank. Just turn off water, press foot lever, and look down the hole with a flashlight. Any buildup will be obvious.
To prevent, just make sure that the valve is closed and there is water across the bottom of the tank before solids are dropped in.
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"A wise man can change his mind. A fool never will." (Japanese Proverb)
"You only grow old when you run out of new things to do"
2018 Flagstaff Micro Lite 25BDS
2023 f-150 SCREW XLT 3.5 Ecoboost (The result of a $68,000 oil change )
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04-05-2020, 06:35 PM
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#7
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Senior Member
Join Date: Aug 2014
Location: Northern KY
Posts: 5,725
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add some dish soap like Dawn to the black tank mixed in a bucket of warm water... this will help to keep things slippery...
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"nothing can now be believed which is seen in a newspaper. Truth itself becomes suspicious by being put into that polluted vehicle."
Thomas Jefferson to John Norvell pg. 2, June 11, 1807
2014 Shamrock 183
2014 RAM 1500 Bighorn Crew Cab, HEMI, 3.21 gears, 8 Spd, 4X4 TST TPMS
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04-05-2020, 06:48 PM
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#8
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Maintenance Engineer
Join Date: Apr 2020
Location: Verdi, NV and Macon County, TN
Posts: 190
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On my last RV I could look straight down the toilet hole and see the bottom of my tank. On my Forest River I can’t, the pipe does an immediate 90 directly off the toilet flange in the opposite direction of where the drain hole is located on the tank.
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04-06-2020, 01:16 PM
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#9
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RiderBloke
Join Date: Jan 2014
Location: On the Road
Posts: 453
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Clearing black tank
Get some Digest-it and use that in your black tank. The instructions are clear. It is what many use all the time and it works well.
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Retired Intentional Interim Minister
Saginaw Valley BMW Riders
BMW Riders of Tampa Bay
Habitat Care-a-Vanner
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04-06-2020, 01:30 PM
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#10
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Senior Member
Join Date: Nov 2018
Posts: 878
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Fill it 1/4 full of water after each dump. If you keep the bottom wet and let it work on the solids, everything will soften up and move with subsequent dumps. No additional costs but a little slower and a lot less effort than the other methods. My black tanks always get a 1/4 tank of water and a couple tablets of tank treatment onced dumped. Only time I've ever had a blockage was when a guest camper brought their own baby wipes and threw them in the toilet over a 3 day weekend, not knowing better.
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2020 Chevrolet 2500 LTZ, 2019 Forest River Wolfpack 23Pack15, 2014 EZGO Golf Cart.
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04-06-2020, 06:42 PM
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#11
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Member
Join Date: May 2019
Posts: 50
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I put ice cubes down the toilet right before driving for a half hour then flushed the tank when I got to my destination and it was clean after.
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04-06-2020, 07:12 PM
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#12
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Senior Member
Join Date: Nov 2017
Location: Dayton Ohio
Posts: 3,591
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We collect dish water in a Rubbermaid pan. Dump it in the toilet with a quarter cup of dawn plus water softener(Calgon).
Before the first major deposit!
All that soapy water softener with warm water does wonders.
Traveling with half a tank of whatever does remove deposits.
Going around turns helps.
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04-06-2020, 07:17 PM
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#13
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Scoundrel
Join Date: Feb 2017
Location: Montrose, Colorado
Posts: 2,803
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Quote:
Originally Posted by rsdata
add some dish soap like Dawn to the black tank mixed in a bucket of warm water... this will help to keep things slippery...
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This^^^^^ First use the wand, then dish soap and water softener (not fabric softener) with plenty of water will help keep the tank cleared out.
My .02
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2024 Geo Pro 15TB, 400W Solar, 2 Golf Cart batteries
2015 F-150 5.0L V8 XLT Crew Cab, 4x4, Tow Package, 36 gal tank, 3.55 locker, 1891 payload, Integrated Brake Controller, Roadmaster Active Suspension
Wooden Spoon Survivor
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04-07-2020, 08:30 AM
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#14
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Senior Member
Join Date: Jul 2017
Location: Central Upstate NY
Posts: 148
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That... and use a dishpan when washing dishes. Rather than dumping that dishwater (via the sink drain) into the gray tank, dump the used dish soap water into the black tank via the toilet. As the black tank normally fills at a slower rate than the gray tank, the former needs the water in order that it remain easier to clean.
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04-15-2020, 01:35 AM
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#15
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Senior Member
Join Date: Nov 2018
Posts: 878
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Quote:
Originally Posted by Summit1
That... and use a dishpan when washing dishes. Rather than dumping that dishwater (via the sink drain) into the gray tank, dump the used dish soap water into the black tank via the toilet. As the black tank normally fills at a slower rate than the gray tank, the former needs the water in order that it remain easier to clean.
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That's one of the reasons I alway put a 1/4 tank of water in the black after dumping. Gray water is going to determine when I have to go to the dump station long before the black tank ever gets close to full. Not even a contest which fills faster. Generally have around half a black tank when the gray hits full.
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2020 Chevrolet 2500 LTZ, 2019 Forest River Wolfpack 23Pack15, 2014 EZGO Golf Cart.
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04-26-2020, 06:18 PM
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#16
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Senior Member
Join Date: Mar 2020
Posts: 112
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First poop that goes in the tank would be a solid so it always has some solid in our tank. Never worried about any solids in there but then again never had solids fill up the tank.
When it rains and I mow, dog crap gets to the point of being fresh again. Water will make poop loosen up. Doesn't need to be clean, just more or less empty.
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04-26-2020, 06:54 PM
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#17
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Junior Member
Join Date: Feb 2020
Posts: 28
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Quote:
Originally Posted by HangDiver
This^^^^^ First use the wand, then dish soap and water softener (not fabric softener) with plenty of water will help keep the tank cleared out.
My .02
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Why not fabric softener?
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04-26-2020, 09:25 PM
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#18
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Scoundrel
Join Date: Feb 2017
Location: Montrose, Colorado
Posts: 2,803
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Quote:
Originally Posted by Mem
Why not fabric softener?
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Water softener removes particles from the water which in turn makes the inside of the holding tank(s) slippery. When used with ample water this helps to completely flush solids from the tank.
You can find Calgon Water Softener at Walmart. Also, if you google "RV Geo-Method" you'll find plenty of information about the role water softener plays in keeping RV tanks clean. Here's a brief explanation... https://mountainmodernlife.com/keep-rv-tanks-clean/
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2024 Geo Pro 15TB, 400W Solar, 2 Golf Cart batteries
2015 F-150 5.0L V8 XLT Crew Cab, 4x4, Tow Package, 36 gal tank, 3.55 locker, 1891 payload, Integrated Brake Controller, Roadmaster Active Suspension
Wooden Spoon Survivor
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