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Old 05-16-2018, 08:52 AM   #1
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Black tank needs cleaning

Anyone have an idea on how to clean out a black tank that has sit for a while...my brother in law bought a used trailer (RV) that sat for a while . it appears to be pretty dry inside . I think there may be some solids because the gate valve is bad and not much liquid came out when i dumped it and it dripped for like 2 days... I am going to replace the gate valve . must be something to add that will soften things up. ????
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Old 05-16-2018, 09:10 AM   #2
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I think water, fill up about half way and drive it for a while then dump and repeat.
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Old 05-16-2018, 09:18 AM   #3
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Dawn dish soap. Dump in a bottle. Let sit for 48 hours. Repeat as needed.

Happy Camper Extreme (extreme, not regular) is even better at loosening the crud.

Once you get the tank cleaned and flowing then decide if really need to change the gate valve. If you do change it - empty the tank and use jacks/blocks to tilt the RV so higher on left side.
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Old 05-16-2018, 09:26 AM   #4
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Quote:
Originally Posted by vsheetz View Post
Dawn dish soap. Dump in a bottle. Let sit for 48 hours. Repeat as needed.

Happy Camper Extreme (extreme, not regular) is even better at loosening the crud.

Once you get the tank cleaned and flowing then decide if really need to change the gate valve. If you do change it - empty the tank and use jacks/blocks to tilt the RV so higher on left side.
X2!
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Old 05-16-2018, 09:29 AM   #5
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Holding tank and sensor cleaning
Lots here and how I set up a pressure washer/sewer jetter.
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Old 05-16-2018, 07:01 PM   #6
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Water, ice, dawn, calgon, and a longish drive.
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Old 05-16-2018, 07:29 PM   #7
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X2 on Spdrcr39......also known as the “Geo Method”.

Check it out on YouTube.
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Old 05-16-2018, 07:42 PM   #8
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lots of ice and some water. drive it a few miles and the sloshing will break up the solids... a little dish soap would help also..lots of turns,,stop and go is best
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Old 05-16-2018, 07:52 PM   #9
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Here is a link to over 50 threads for "clean black tank".

https://www.google.com/search?q=%22c...=10&gws_rd=ssl

A search of "black tank" would be in the multiple thousands, There are also numerous videos on youtube, including a couple demonstrating the futility of the ice, unless you have hundred of dollars for ice.

Read and research as the best way to deal with my black tank may not be best for them. Access to the tank openings, position of the toilet, and configuration of the tank body will be different.
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Old 05-16-2018, 08:09 PM   #10
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This stuff worksClick image for larger version

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Old 05-16-2018, 08:14 PM   #11
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X3 on Happy Camper Extreem...

Happy Camper Extreme (extreme, not regular) is even better at loosening the crud.
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Old 05-16-2018, 08:18 PM   #12
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Quote:
Originally Posted by vsheetz View Post
Dawn dish soap. Dump in a bottle. Let sit for 48 hours. Repeat as needed.

Happy Camper Extreme (extreme, not regular) is even better at loosening the crud.

Once you get the tank cleaned and flowing then decide if really need to change the gate valve. If you do change it - empty the tank and use jacks/blocks to tilt the RV so higher on left side.
X3
Happy Camper it the product for me. Been using it for 5 yrs. The Extreme will clean out your tank
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Old 05-16-2018, 08:24 PM   #13
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Once you get it clean you don't need anything but lots of water to keep it that way. I put 10 gallons in mine immediately after dumping and flushing.
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Old 05-16-2018, 08:37 PM   #14
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We got a sprayer we put down inside the toilet into our tank. You have to have access straight down into the tank for it to work.

Who knows what the PO did prior to us. Sensors in both tanks not working when we got it 3 yrs ago.

Calgon, Dawn dish soap, and water got a lot of stuff out of both tanks but did not help the sensor. We added this mixture every time we emptied the tanks and then drove with it in the tanks to the CG and used the tanks before emptying. Sensors still not working.

Filled both tanks FULL and let sit over night and then dumped. Used the sprayer in the black tank and filled it up again and then dumped and the sensor was working.

Read about Happy Camper and decided to use that to see if it would help with the grey tank. It is filled now and will see how it works on the sensor when we empty it.

Good luck with yours. Lot's of water in the black and the grey will help.
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