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Old 05-17-2019, 10:34 PM   #1
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Black Water Tank Flusher won’t work

I have a 2005 Forest River Cardinal 5th wheel. When I drain my black water tank and try to flush the tank with the water hose, but water want go in the tank. The water line goes straight up. What am I doing wrong or not doing right?
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Old 05-18-2019, 12:07 AM   #2
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I have a 2005 Forest River Cardinal 5th wheel. When I drain my black water tank and try to flush the tank with the water hose, but water want go in the tank. The water line goes straight up. What am I doing wrong or not doing right?
What do you mean by "water line goes straight up"?
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Old 05-18-2019, 12:08 AM   #3
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What brand/model flusher? And what do you mean by "the water line goes straight up"? Can you post a photo?
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Old 05-18-2019, 05:22 AM   #4
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I have a 2005 Forest River Cardinal 5th wheel. When I drain my black water tank and try to flush the tank with the water hose, but water want go in the tank. The water line goes straight up. What am I doing wrong or not doing right?
Here is a typical factory install of a black tank flush system. It's self contained. The vacuum breaker/check valve could be located in any of several places (under vanity/behind shower/in washer dryer closet etc.). It will be located at least 6" above the toilet rim height though wherever it is. This is a typical install and your valve may look different (clear/black/different shape etc.). Your issue may be a clogged tank nozzle/inoperative valve/valve installed backwards etc..
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Old 05-18-2019, 12:54 PM   #5
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I also have a 2095 Cardinal. The water line goes up to where the check valve is located behind the shower faucet. Last year when my sprayer got clogged I found it was the spray head in the tank. Although some have had success in cleaning it with chemicals I choose to replace it. I bought a spinner type at Camping World. I did a hose test of the two in the front yard and found the spinner type much more efficient. As for replacing the sprayer I removed the screws holding down the storage floor and slid the plywood out the passenger side. This gave me full access to the tank without having to mess with the under belly sheeting. .
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