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Old 05-14-2016, 08:59 AM   #1
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Black water tank is jammed with tp

Why does the black water tank on my 2007 25fb jam up with tp directly below the toilet? Always plenty of water. I have to use a stick to clear it out. Never used to happen.
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Old 05-14-2016, 09:22 AM   #2
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Try putting some powered laundry soap down there, fill the tank up 50% and tow it around to slosh things around and then dump. The laundry soap will make the inside of the tank slick.

Also, take a few sheets of your toilet paper and put in a container of water then shake it up. if the toilet paper disintegrates then it should be fine. If it doesn't then try another brand.

http://www.thefitrv.com/rv-tips/toil...with-children/

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Old 05-14-2016, 09:25 AM   #3
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Use more water and wash your stick...
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Old 05-14-2016, 11:01 AM   #4
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Use more water, buy a bag of ice, put it in and drive to next campground. Also use septic safe or RV TP.
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Old 05-14-2016, 11:04 AM   #5
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If summer is coming it must be time for another TP thread!



Sounds like a combination of not using the proper biodegradable TP (or too much), and not enough vehicle motion to agitate/pulverize the contents of the black water tank, before dumping. Plus not putting enough water and digester chemical in the black tank first, before adding solid material.

Good luck!

TP threads:

https://cse.google.com/cse?cx=011403...=tp&gsc.page=1

PS -- See the following sub-forums for more threads -- not located correctly here in the LP Gas sub-forum IMO:

http://www.airforums.com/forums/f163/

http://www.airforums.com/forums/f444/
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Old 05-14-2016, 11:31 AM   #6
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Like the others, I suggest switching to a tank-friendly TP, we use the Scott single ply tissue, seems to work great. We also keep the tank valve closed until it's over 3/4 full before dumping, helps keep things moving along.

Between sites I like to put a couple gallons of water and a little detergent to do the cleaning. Once in a while I use Extreme Holding Tank Cleaner. I put it in according to directions and drove about 400 miles, then dumped. That seemed to really clean things out.
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Old 05-14-2016, 12:53 PM   #7
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I do not know the floor plan for your trailer but if the toilet is on the curb side there is nothing you can do. That is a design fault. The tank is tipped to the drivers side and when you flush the water out runs the rest and leaves it behind, no pun intended.
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Old 05-14-2016, 01:14 PM   #8
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Originally Posted by HowieE View Post
I do not know the floor plan for your trailer but if the toilet is on the curb side there is nothing you can do. That is a design fault. The tank is tipped to the drivers side and when you flush the water out runs the rest and leaves it behind, no pun intended.
Properly cared for, a black water tank should NEVER have ANY solid material in it just before the contents are dumped.

The effluent should be a slurry of uniformly colored material, with no discernible toilet paper or human solid waste material.

This is pretty simple science at work here . . .
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Old 05-14-2016, 01:22 PM   #9
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Originally Posted by maxlacounte View Post
Why does the black water tank on my 2007 25fb jam up with tp directly below the toilet? Always plenty of water. I have to use a stick to clear it out. Never used to happen.
PS to earlier comments -- welcome to the forum! Sorry not to have said that first. When you have time you might be amused by the other TP threads I linked earlier. Further humorous comments are to be expected here IMO.

Have a good weekend. Give my regards to The Swiss Hotel!

Peter
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Old 05-14-2016, 02:10 PM   #10
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Originally Posted by OTRA15 View Post
Properly cared for, a black water tank should NEVER have ANY solid material in it just before the contents are dumped.

The effluent should be a slurry of uniformly colored material, with no discernible toilet paper or human solid waste material.

This is pretty simple science at work here . . .
Would care to elaborate on this new and revolutionary theory. Having served on my local board of health while we were deeply involved with septic systems problems and their operation. Given that most of us a weekend campers I would like to know more about this advancement with respect to timing and chemical process. I accept that technology is moving forward in many areas but I suspect that SFDH has not changed.

If you are familiar with the principles of sewage flow you will know that lines are constructed at a pitch of 1/8 in per foot. That provides the flow rate that maintain the suspension of solids in the water and thus does not leave anything behind. Trailer tanks have a much higher pitch and thus the problem of the Brown Mound if the toilet is on the curb side of the trailer.
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Old 05-14-2016, 02:23 PM   #11
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Standard good RV practice calls for complete agitation of black contents before dumping as a uniform slurry. No new theory. Same ol' same ol' as done for decades. [details omitted as most experienced RVers know how IMO[
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Old 05-14-2016, 03:12 PM   #12
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As I suspected your trailer has a curb side toilet. There is nothing you can do but live with it if you dump at the campground. Yes a drive of 20 plus miles will produce the slurry mentioned above but not always an option. It is an age old problem common to trailer designed by people that never used one.

If you camp with sewer do not open the black water valve until you intend to leave or are full. Failure to follow this will only increase the problem.

One thing I have done for years and it would help in this situation. When dumping I open the black valve and let it flow till near empty. While the black valve is still open lift the hose to above the banana strip and open the gray valve and count to 10. Close the gray valve and drop the hose and let it completely drain. This sends a slug of water back into the black tank and provides a formative flush. Close the black valve and open the gray.

With the exception of my comment above "leaves it behind" comments were not meant to be humorous.


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Old 05-14-2016, 03:45 PM   #13
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Not to get too gross about it, but a fair number of long-time RVers simply don't put TP down the tank. It goes into a trash can instead.

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Old 05-14-2016, 04:23 PM   #14
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Yes the other threads I linked earlier are full of previous comments about using plastic bags etc. for disposing of dirty TP.

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Old 05-14-2016, 05:01 PM   #15
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Call All Pro Water-Flow @ 719-651-5213.. He has a liquid formula that Ive been using and never have had an issue since...He loves to help people out and will tell you the best way to keep up your black water tank. He cleans out tanks at International.. Give him a shout..
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Old 05-14-2016, 05:10 PM   #16
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Tilt the trailer slightly away from the toilet if it is on the wrong side.
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Old 05-14-2016, 06:28 PM   #17
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Making a milkshake....
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Old 05-14-2016, 07:11 PM   #18
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Ice cubes really do nothing.
Fill the BW tank about 2/3 full.
A full tank leaves no room for sloshing.
Take it for a drive.
Empty the tank.
Check the results. If there is still a problem.
Thetford makes chemicals for treating the tanks.
Add a good dose to a tank that is half full.
Take it for a drive. Let it sit.
Take it for another drive.
Empty upon returning.
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Old 05-15-2016, 10:47 AM   #19
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Quote:
Originally Posted by TG Twinkie View Post
Ice cubes really do nothing.
Fill the BW tank about 2/3 full.
A full tank leaves no room for sloshing.
Take it for a drive.
Empty the tank.
Check the results. If there is still a problem.
Thetford makes chemicals for treating the tanks.
Add a good dose to a tank that is half full.
Take it for a drive. Let it sit.
Take it for another drive.
Empty upon returning.
.
I second that and woul add one or two of those dishwasher packets to the black tank as you're adding water to it. When you drive around and it's a'sloshing, it helps clean. The additive that gives your glasses that **spot free rinse**, also helps...
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Old 05-15-2016, 11:41 AM   #20
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Nothing will ruin your day like a black water tank clog. Over the course of 18 yrs, I've had only one, and it was a mess beyond belief. As a result of that one clog, I go to great lengths to prevent another one.

1) I drain my tank when it's 2/3's to 3/4's full. That way, I have some wiggle room to run a (high pressure, city water) hose down my toilet to break things up.

I also have an assortment of 1/2" PVC pipe caps that I've drilled 1/8" holes in (different configurations). I use these as "nozzles" on the end of my hose. I use brass fittings to adapt hose thread to pipe thread.

2) Each time I drain my tank, I flush it out twice with fresh water; some times three times.

3) Once drained, I fill the tank with one inch of water; enough to cover the bottom of the tank. That helps prevent solids from sticking to bottom of tank.

I realize this sounds like a lot. But it's all about "prevention."

Tom
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