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Old 07-31-2019, 01:09 PM   #1
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Black tank flush help

Hello, so we have a new wolf pack 23+15. I'm a bit curious about this black tank flush. My manuals don't say anything about it. From what I see, the bottom port has a quick disconnect that seems to have pressure to it right now. I went to plug a quick disconnect hose into it and it covered me in antifreeze so I assume it's winterized and under pressure. The top is just a standard garden hose threaded end. So do you just connect a quick connect side to the bottom port then a threaded end of a hose to the too and let it rip? It says something about turning off the supply line first but I do not see where those would be. Any help?

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Old 07-31-2019, 01:15 PM   #2
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I have not seen anything like the bottom port on any of my rigs. Not sure what that is. All of my tank flushes have been just a garden hose connection.
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Old 07-31-2019, 01:20 PM   #3
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I have not seen anything like the bottom port on any of my rigs. Not sure what that is. All of my tank flushes have been just a garden hose connection.
Same here.


OP, do you happen to have a factory-installed power macerater? It might output through that bottom connection.
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Old 07-31-2019, 01:30 PM   #4
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The top port is the black tank sprayer/flusher. As you thought, you screw a garden hose to it and "let 'er rip" to spray the level sensors and to flush out the tank

Directly below it is an odd fitting as mentioned above, but in my 2020 trailer that lower is the city water hose connection. It bypasses your fresh water tank and 12V pump and you just put your city water hose to it and feed city water pressure to the entire unit (excluding the tank and pump segments that are not seen by this flow path). That fitting is an odd duck for sure, and something I would have zero interest in.

You would want to have a 40PSI regulator at the trailer city water inlet first, then you would want to thread your water filter on to that, then you would want your supply hose on that filter inlet. Some prefer to put the 40PSI regulator at the beginning of the hose to protect the hose from pressure. That is your choice.

Personally, I would want to know if I could get that quick connect off and get back to a regular hose connection.... Unless.....

What if you call the dealer and learn that they gave you a quick connect port in that model to attach regulated air pressure to so that you could blow out the lines? That is the only reason I could think of to want/need a quick disconnect. If that were the case, I would say... Pretty neat!
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Old 07-31-2019, 01:37 PM   #5
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DUDE! It is a gas line!

It is the RVQ Quick Connect! It is a Toy-Hauler thing I guess?

RVQ Quick Connect
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Old 07-31-2019, 01:49 PM   #6
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It's definitely something to do with the flushing system and it's under pressure right now. When I try to insert a quick fitting it blows water out. The city water connection is to the left as pictured. The RVQ gas line is below it allClick image for larger version

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Old 07-31-2019, 01:49 PM   #7
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The cover has some generic instructions but I can't find said supply lines to depressurize.Click image for larger version

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Old 07-31-2019, 01:50 PM   #8
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Only have the one female hose connector. I hook up to water and turn it ON. All say make sure you open your black drain first before flushing or you can run it over out the vent stack. I personally flush it closed but time it for 5 minutes and never leave it. This assuming you have already done the initial draining first. I thinkk the extra water buildup for the flush helps.

Also, I do use a pressure regulator on the flush as well, just like the one I use on city water... Brass piece.
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Old 07-31-2019, 01:55 PM   #9
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I have a similair quick connect on the faucet in the sink for my outdoor kitchen. I can connect a regular facuet like spout or a sprayer with a hose. I've never seen one on the side of a trailer though.

What does the writing on the sticker under the cover say? I can almost read it when I zoom in but not quite.

EDIT: OK, I see you added another picture. Obviously there is some sort of shut off valve inside the trailer to turn off the water supply to that port. No clue where that would be though...
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Old 07-31-2019, 01:59 PM   #10
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DUDE! It is a gas line!

It is the RVQ Quick Connect! It is a Toy-Hauler thing I guess?

RVQ Quick Connect
So you're saying antifreeze should come out of a propane connection? OP wrote "I went to plug a quick disconnect hose into it and it covered me in antifreeze...."
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Old 07-31-2019, 01:59 PM   #11
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Old 07-31-2019, 02:00 PM   #12
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sounds like the quick connect maybe for a hose and sprayer, maybe to rinse off the toys.

Did a hose with sprayer come with the unit? If not I would check with the dealer as it probably should of.
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Old 07-31-2019, 02:01 PM   #13
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Spray Away is a brand name. Apparently it should have come with a hose at one point.

https://www.dwincorp.com/product/spr...hose-included/
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Old 07-31-2019, 02:05 PM   #14
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I do have a hose I think will fit it but since it's pressurized I can't get the fitting in there. Assuming there is a valve for it? But can't find one.
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Old 07-31-2019, 02:06 PM   #15
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It's also possible there is no shut-off valve and it's connected directly to your water supply.

Turn off your city water, turn off your water pump, open a faucet to de-pressurize the system, then connect the hose.
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Old 07-31-2019, 02:14 PM   #16
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I'm wondering that. It does look to be some sort of clean your toys off deal. I still wonder if I can use it then to flush the black tank ..
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Originally Posted by Iwritecode View Post
It's also possible there is no shut-off valve and it's connected directly to your water supply.

Turn off your city water, turn off your water pump, open a faucet to de-pressurize the system, then connect the hose.
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Old 07-31-2019, 02:15 PM   #17
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Id be calling my dealer. It has a label under it that says 'BLACK TANK" . also has two separate ports for city water and fresh tank fill. my best guess is the upper one is the flush. I have never heard of pressurizing a black tank. I Give.
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Old 07-31-2019, 02:21 PM   #18
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I'm wondering that. It does look to be some sort of clean your toys off deal. I still wonder if I can use it then to flush the black tank ..
It shouldn't have anything to do with your black tank at all. The threaded connection in your first pic is your black tank flush. You just hook up a regular hose to it and turn it on.

The termination valve the warning is referring to is simply your black tank valve that you use to drain the tank. It's suggested to only run the flush when that valve is open so you don't inadvertently fill up your black tank.

There have been many stories where people turn the sprayer on, then get side-tracked and forget it. Clean-up can be unpleasant...
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Old 07-31-2019, 02:28 PM   #19
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with the proper connector and enough water in your tank you should be able to use that water to flush the tank with unless there is a separate high pressure pump for the quick connect then I wouldn't try it
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Old 07-31-2019, 02:35 PM   #20
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Hook up a hose to top inlet, open black door, turn on the water. Does water flow out? You will be able to hear it spraying if this is it. This is assuming there is no black water in the tank.
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