Here I am

black tank is plug.

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Old and inexpensive way (This is from an old Air Stream owners manual), Hook a long sewer hose on to the flush valve(valve closed), raise the end of hose above the level of the valv and fill with water, hold the hose as high as you can and open the valve, close valve and connect to sewer, open valve. bg
 
Old and inexpensive way (This is from an old Air Stream owners manual), Hook a long sewer hose on to the flush valve(valve closed), raise the end of hose above the level of the valv and fill with water, hold the hose as high as you can and open the valve, close valve and connect to sewer, open valve. bg

You hold the hose and I'll run the valve......:D:D

Just in case it looks like the dumping scene from the movie "RV"!!!

 
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Dump a couple of buckets of scalding hot water down your toilet with the dump valve closed and let it sit for 15 min or so. Repeat the process 2 or 3 times. You would be amazed at how that can break up your solids when your have a plug.
 
Old and inexpensive way (This is from an old Air Stream owners manual), Hook a long sewer hose on to the flush valve(valve closed), raise the end of hose above the level of the valv and fill with water, hold the hose as high as you can and open the valve, close valve and connect to sewer, open valve. bg
sounds good
 
Next time remember not to leave the camp with a full tank otherwise this can happen since everything simply settles to the bottom and turns solid. Also, never leave your black water valve open when camping because the liquids will drain but the solids wont because of the tanks flat bottom. You'll just end up with a gigantic stalagmite on the bottom of the black tank which will be hard to get out. Instead leave the valve closed and open it up every couple days, depending on how much you use the toilet and if the shower dumps into the black or grey tank.

FYI, when you go camping, pack a couple of those dishwasher soap tablets. Then when you're leaving and dumping the tanks and and you think you have most of the crud out of there, close the valve and put about 5 gallons of water back in the black tank and throw one or two tablets down the toilet. Then when you drive home the sloshing water will wash the interior of the tank and hopefully the toilet paper stuck on the water sensors.

Then next time you go camping you'll have a much fresher crapper.
 
I also dump about 7 full toilets bowls full of water in the tank at the start of the camping trip so that when you flush it will have water to land into and float around and away form directly under the toilet and not pyramid up right below the toilet. The little bit of water that gets flushed each time is not enough to get things floating and very dumpable.
 
Sounds like you need to hold down flush pedal longer. We have always used the most expensive Charmin with zero issues full timing since 2011.
 
Here is the routine I have developed over many snowbird winters.

1. Get a clear sight adapter and put it between the trailer and the sewer hose.
2. I leave the black tank closed for a week at a time. Grey tanks open.
3. I form a pee trap in the sewer hose with a couple boards, one 2x and a 4x4.
4. To dump and flush, I remove the pee trap boards.
5. Close the grey water tanks.
6. Open the black water tank and turn on the hose to the built in flush system.
7. Watch the sight tube until I am down to just hose water coming out.
8. Go inside and do two full bowl super flushes. "Bomb the Pile!" Note: Full bowl means filling the bowl to the bottom of the upper rim.
9. Go back outside and view discharge.
10. Close the black water tank and run the flush water in for four(4) minutes. Do not let anyone distract you at this point.
11. Open and drain and repeat 10 again.
12. Flush a bit and verify that you have nice clear water coming out of the tank. If not go back to step 8 and start again.
13. When you have nice clear discharge, put the pee trap boards back the sewer line and fill the pee trap.
14. Close the black water tank and add about a minute worth of water to the tank with the flush hose.
15. Secure the flush hose. I have a little inline valve adapter at the side of the trailer and the other end gets turned off.
16. Open the grey water tanks and go add your chemical to the tank.

I have had the burping a couple of times, however the super flushes seem to have fixed that issue.

Having piles in not good!!
 
Similar to Snoking, but the secret to not having a geizer shooting from your roof is to have your phone in your pocket with a timer set every time the valves are closed!!!
 
Here is my scenario with the reverse flush. I leave my gray valves closed and use that water to flush the hose at the end. I empty the black tank then close the reverse flush valve leaving the black tank valve open. Turn on the water and use a stop watch reverse flushing for 5 minutes ish. Turn off water and open valve on reverse flush emptying tank. If it needs more I just repeat. I only do this maybe on the 3rd or fourth dump which usually is pretty clean anyway. The Happy Camper usually dissolves everything so all the extra is not needed and no odors inside especially at 90 plus temperatures when most tank additives fall on their face. Very clean and efficient operation.

Dave
 
Ringneck;
What trailer do you have? I assume a 5ver, with a kink in the dump line through the storage area. Have a friend who had this sinareo, he re-piped that area to get away from the plugging. good luck on your problem.
 
You hold the hose and I'll run the valve......:D:D

Just in case it looks like the dumping scene from the movie "RV"!!!



My friend used to do maintenance on ground support vehicles at PVD. Every once in a while one of the plane service folks would come back BLUE. The planes holding tank has a two stage valve. Remove the big cover, hook up the hose, and use a special long handle , plug wrench sealed through the hose fitting to remove the inner plug. Replace inner plug after emptying the holding tank, then disconnect and replace outer cover. Dirty trick: don’t tighten the inner plug. I don’t think you ever really get rid of the dye or disinfectant smell. Never mind the rest. Can you say Justifiable Homicide?
 
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