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Old 09-28-2021, 02:17 PM   #1
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Exclamation Black Tank Flush Connection

Good Afternoon
When I connect the hose to flush out the black water tank, nothing is coming out, I have to run a hose trough the toilet to flush it, I am missing a step in the procedure.
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Old 09-28-2021, 02:23 PM   #2
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Good Afternoon
When I connect the hose to flush out the black water tank, nothing is coming out, I have to run a hose trough the toilet to flush it, I am missing a step in the procedure.
Your black tank flush vacuum breaker/check valve may have been installed backwards as many here on the forum have reported.
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Old 09-28-2021, 02:25 PM   #3
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The anti-siphon vacuum breaker is likely installed wrong, or you have a major kink in the line.
Look under cabinets just inside from the black flush connection and see if you can trace out the lines.
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Old 09-28-2021, 02:27 PM   #4
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Where Can I find It, Please
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Old 09-28-2021, 02:30 PM   #5
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I Have a 2021 Forest River Cherokee Grey Wolf 18RR Toy Hauler Travel Trailer
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Old 09-28-2021, 02:32 PM   #6
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Where Can I find It, Please
Post #3 gives some suggestions.
This apparatus must be higher that the top rim of your commode. Some are installed inside the bathroom sink cabinet - some up high in a back corner.

In my Wildcat fifth wheel, it's behind the shower wall.
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Old 09-28-2021, 02:35 PM   #7
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Picture

Here it is
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Old 09-29-2021, 02:18 PM   #8
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Where Can I find It, Please
It's going to be inside, likely in a cabinet or behind a removable wall panel, just above the fitting on the outside of the camper. Perhaps behind the medicine cabinet if not in the vanity.
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Old 09-29-2021, 03:30 PM   #9
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Where ever it is this is what it looks like. Input on the bottom/output to tank on the side.
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Old 09-30-2021, 10:37 AM   #10
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Where ever it is this is what it looks like. Input on the bottom/output to tank on the side.
Good image...very helpful.
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Old 09-30-2021, 10:53 AM   #11
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Here it is

Whatever room, cabinet is located right next to that window is where you'll find the lines & valve shown above. If it's a cabinet, there will most likely be a removable panel inside to give access to the valve.
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Old 09-30-2021, 11:21 AM   #12
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Whatever room, cabinet is located right next to that window is where you'll find the lines & valve shown above. If it's a cabinet, there will most likely be a removable panel inside to give access to the valve.
Iíve never seen a removable panel if this check valve/vacuum breaker is in the bathroom sink cabinet. They are in plain sight as shown in post #9.
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Old 09-30-2021, 11:27 AM   #13
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Iíve never seen a removable panel if this check valve/vacuum breaker is in the bathroom sink cabinet. They are in plain sight as shown in post #9.
I agree Dan but, not knowing the exact floorplan, I was trying to cover all bases. For all we know, there could be a small bedroom cabinet on that wall next to the bathroom that we don't know exactly where the wall even is.
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Old 09-30-2021, 11:52 AM   #14
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Iíve never seen a removable panel if this check valve/vacuum breaker is in the bathroom sink cabinet. They are in plain sight as shown in post #9.
FYI, We have have Wolf Pack 27 and the valve is in the bath room behind a removable panel in the sink cabinet, there is no door on the cabinet.

The OP I believe does have a door on the cabinet in that unit.
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