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Old 01-05-2014, 08:28 PM   #1
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Black Tank Flush

My Jayco 22FB has a hose connection for flushing the black tank. A sticker states that the black tank valve has to be open when the water is turned on. However, I was just watching some YouTube videos and one stated that you can shut the black take valve with the water on for a few minutes (3-4) and open the valve again. They did this a couple of times until the tank ran clear by watching the clear elbow. This video was on a motor home and not a Jayco trailer. Could I follow this procedure on my 22FB or is it possible the motor home is set-up differently.

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Old 01-05-2014, 08:46 PM   #2
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You can close it for a bit. They say leave it open because you can imagine the mess if you close it and forget about it.

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Old 01-05-2014, 09:37 PM   #3
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What you saw in the video is exactly the method I follow. I rarely use the black tank flush during the camping season except on our last trip of the year, usually I have to follow that method about 6 times before the water runs clear.
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Old 01-06-2014, 05:46 AM   #4
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I normally only have about 50% level on the black tank. I leave the black dump valve closed and run the tank flusher for about 2 minutes to get everything stirred up then open the dump valve. When it is almost empty I close the valve again for about 2 minutes and open again. If no one is waiting behind me I will repeat this about 3 - 4 times.
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Old 01-08-2014, 11:10 AM   #5
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I do this as well, closing the valve and letting the water rise in the tank a few times. However, I know a guy who incorrectly hooked his hose to the black tank flush at a campground when setting up. He thought he was all set to camp when people started yelling that he had a geyser coming out of the vent on the roof. So while I do close my black valve to flush the tank out, I always make sure I check my gauge and never leave the process unattended!

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Old 01-09-2014, 04:04 PM   #6
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Question about the flush connection

So is the flush connection an option? I have a 2012 22FB and can't find a connection and the dealer never said anything about one. I bought and used a flush wand but I assume the connection would do a better job of cleaning.

Gary Hoskins
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Old 01-09-2014, 08:36 PM   #7
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My 22fb is a 2013. The connection is on the rear to the right of center.
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Old 01-10-2014, 10:14 AM   #8
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If you have it, you can't miss it. Mine (28BHBE) is on the rear wall next to the city water inlet. It has a big silver sticker above it that warns you to leave the valves open while operating the flush.

I actually flushed what I thought was a "clean" black tank into my side yard after one of our first trips (gasp! Yeah, yeah, I know...). Needless to say, it was NOT clean, so yes, the built-in flush works well. And no, I will NOT do that again...

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Old 01-10-2014, 11:33 AM   #9
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Well I checked and couldn't find one. In a way I'm glad . . . hate to think I walked around it for a year and a half

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Old 01-10-2014, 12:14 PM   #10
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I would be carefull leaving the black tank valve closed while operating the tank flush. You could also damage a check valve for the flush system. If it is damaged you will get water in your bathroom. This was a common problem on allot of Keystone campers and it is a similar set up on the Jaycos. It happened to my buddy on his new Keystone Hornet he read people were leaving them closed for allittle while so he tried it. Next time he went camping water all over the bathroom floor.


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