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Old 07-07-2014, 10:10 AM   #1
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Unhappy Flushing the black water tank on my 276 HW

I have a new Rockwood 276 HW pop-up. I would like to know if anyone knows how to flush the black water holding tank. I don't see a hose connection like on most RV's or Trailers. Any help would be appreciated.
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Old 07-07-2014, 04:39 PM   #2
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Going to have to get an external wand and stick it down the toilet. Here is a link for an external wand I use. Amazon.com: Camco 40094 Swivel Stik Holding Tank Rinser with Shutoff Valve: Automotive
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Old 07-08-2014, 06:18 AM   #3
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I use a hydro flusk from valterra. Valterra F02-4100 45 RV Hydroflush. Its clear so you can see the tank water is clean and it connects between the stinky slinky and the pup drain connection. It back fills the tank so you can do it without raising the pup. So far it works great. Even helps if in tank has a clog.
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Old 07-08-2014, 11:17 AM   #4
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Unfortunately, using anything like a hydroflush, you have no visible indication as to how full the tank is when you are back-flushing. You can only guess you have not overfilled, and guessing wrong is not a pretty sight. But this is the only method to flush the tank without raising the roof, unless you want to cut a hole in the flooring to access the tank and install a quickie flush sprayer. As for me, I just use the good ol' wand, and clean it out through the toilet while the roof is still up.
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Old 07-08-2014, 12:42 PM   #5
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W4drr yes I agree if you use the flush king that uses a gate valve between the flush n hose but a valterra hydroflush does not so any water in the tank has only the hose to go at the same time as you spray a jet of water ip bak into the rank. But yes the wand is vest either way.
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Old 07-08-2014, 01:19 PM   #6
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black tank flush

I also use the valterra f02-4100 on my 256HW. I first dump the tank when there is nothing else coming out then i put the water on for about 30secondes to a minute then stop the water and let the tank dump again. then repeat the process till water that is dumping out of tank is clear. It usualy takes 2 flushings to be clear.
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Old 07-09-2014, 12:32 AM   #7
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I use a flush king on mine. Yes, I heard the warnings about over filling, but I've never had a problem. My tank is 12 gallons, and with the sprayer inside the FK I let it go about 2-3 minutes before I open the valve again. Usually 2-3 flushes gets clear water out of the pipe. I put new chemical into the tank on our first use of the next trip, and my tank is always clean.


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Old 07-22-2014, 01:27 PM   #8
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I currently have a cassette toilet and do not own a black tank. But I am very interested in this subject because this is gonna be a huge change for me when I replace my current HW.

From what I can see on the videos using the hydroflush, the blade valve in the black tank must be open to enable the water spray jet to reach inside the tank. My problem with this is how does one fill the tank up? Does it not just stream out as I spray into it? I get the whole assumption that the spray is hitting all parts in the tank and carrying out the waste. But I am not so sure about that. Would it not be better to fill up the black tank with fresh water and dump the tank a couple of times? Or do people do a combination of all this?

I also like the whole ice cube in the toilet thing while one drives. That seems like it would work really well. lol.

Vin.
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Old 07-23-2014, 01:23 AM   #9
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On my flush king, there is a blade valve as well as a turning valve for the fresh water. The turning valve has tank, hose, and off. Here's how I use mine...
Connect everything and open both the valve on the camper and the FK. Then I close the FK valve only and turn the water on tank for about five minutes. I open the blade valve while the water is running and note the 'color' of the water coming out. I do this until clear water comes out, usually 2-3 times. Then the last time I'll turn the water off and open both blade valves to completely empty my clean tank. Then I close the valve on the camper, turn the FW valve to 'hose', and I'll give the hose some work around to make sure it's all clean. And that's all there is to it.

The kit comes with a back flow preventer, so you can use your FW hose for other things, like washing down the camper.


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Old 07-23-2014, 07:22 AM   #10
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Quote:
Originally Posted by IonicBrick View Post
On my flush king, there is a blade valve as well as a turning valve for the fresh water. The turning valve has tank, hose, and off. Here's how I use mine...
Connect everything and open both the valve on the camper and the FK. Then I close the FK valve only and turn the water on tank for about five minutes. I open the blade valve while the water is running and note the 'color' of the water coming out. I do this until clear water comes out, usually 2-3 times. Then the last time I'll turn the water off and open both blade valves to completely empty my clean tank. Then I close the valve on the camper, turn the FW valve to 'hose', and I'll give the hose some work around to make sure it's all clean. And that's all there is to it.

The kit comes with a back flow preventer, so you can use your FW hose for other things, like washing down the camper.


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Ok. So if I understand your post correctly. You never fill the tank. You blast the water in and let it flow as you blast until it runs clean. You will blast and fill it up as best you can then drain and repeat for 2-3 times until clear? Ok. I get it.

Thanks.

Vin.
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