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Old 07-12-2016, 05:41 AM   #1
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Black water Tank flush

Hello.
I own a 2016 Crossroads Cruiser CF351MK. On a recent trip to Florida I attempted to use the black tank flush system but had not luck in doing so.
When I hooked up the hose I just got spewing water from back pressure like the system was blocked or not open. I am sure it something I am doing wrong. Can anyone shed some light on this process for me. Thanks
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Old 07-12-2016, 05:53 AM   #2
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I would guess the line running to the flush head in the tank is kinked.
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Old 07-12-2016, 06:28 AM   #3
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I would guess the line running to the flush head in the tank is kinked.
So that would mean dropping the belly sheet covering to gain access to line.
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Old 07-12-2016, 06:35 AM   #4
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Clog at the nozzle:

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Originally Posted by breams View Post
Hello.
I own a 2016 Crossroads Cruiser CF351MK. On a recent trip to Florida I attempted to use the black tank flush system but had not luck in doing so.
When I hooked up the hose I just got spewing water from back pressure like the system was blocked or not open. I am sure it something I am doing wrong. Can anyone shed some light on this process for me. Thanks
There is a check valve and a vacuum breaker in the system. We traveled with a few gallons in our tank and the toilet paper slurry clogged the screen of the nozzle. I ended up moving the check valve and vacuum breaker to the basement but I also ended up having to drop the belly liner, remove the clog from the nozzle. (make sure the tank is MT)
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Old 07-12-2016, 06:41 AM   #5
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Sounds like it could be a bigger problem than I anticipated. Thanks for help
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Old 07-12-2016, 06:58 AM   #6
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There is a check valve and a vacuum breaker in the system. We traveled with a few gallons in our tank and the toilet paper slurry clogged the screen of the nozzle. I ended up moving the check valve and vacuum breaker to the basement but I also ended up having to drop the belly liner, remove the clog from the nozzle. (make sure the tank is MT)


What is the procedure for using the built in black water tank flush? Want to be sure I am doing it correctly before tearing into it.
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Old 07-12-2016, 09:31 AM   #7
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Basically you hook up water hose from outside faucet to black tank flush, open black tank valve and then turn on the water to flush.
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Old 07-12-2016, 09:41 AM   #8
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Basically you hook up water hose from outside faucet to black tank flush, open black tank valve and then turn on the water to flush.

Thanks for reply. About what I thought and way I performed it. Just was hoping I missed a switch or something. Looks like I will be going underneath and removing skin to see what is installed wrong.
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Old 07-12-2016, 03:49 PM   #9
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Our flush plugged a couple months ago. I tried various ways to unplug it. Finally snaked a piece of ice maker tubing up the hose to the tank and got it going. I don't think it is turning like it did tho. I've already got an access hole in the coroplast. Need to pull the sprayer and see what's wrong. It'll wait to cooler weather tho.

BTW, I moved the anti siphon valve and check valve to the basement too. I realize it is not as high as it is supposed to be, so I also use a hose end anti backflow connector I got at Lowe's.
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Old 07-13-2016, 05:46 AM   #10
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Our flush plugged a couple months ago. I tried various ways to unplug it. Finally snaked a piece of ice maker tubing up the hose to the tank and got it going. I don't think it is turning like it did tho. I've already got an access hole in the coroplast. Need to pull the sprayer and see what's wrong. It'll wait to cooler weather tho.

BTW, I moved the anti siphon valve and check valve to the basement too. I realize it is not as high as it is supposed to be, so I also use a hose end anti backflow connector I got at Lowe's.

Thanks,
I think I will try snaking a small line thru the hose to the tank before anything else.
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