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Old 07-09-2013, 08:49 PM   #1
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Tornado Tank Rinser - Back flow valve


I have just installed the tornado tank rinser, on the black tank and I followed the instructions and installed the back flow preventer on between the clear plastic hose and the jet head that goes into the tank.

Just tested it and the back flow preventer releases clean water when I shut off the rinse, is this normal ? I assume it is and that there is a non return valve somewhere in the tornado head that prevents the mucky stuff coming out of the tank through the head ?

Dont want a smelly mess on my hands next rip !!!

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Old 07-10-2013, 06:48 AM   #2
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Anyone had a similar experience ?

2011 F150 Ecoboost Screw 4x4 c/w max tow
2010 Roo 21RS
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Old 07-10-2013, 07:04 AM   #3
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If you're asking if the connection is still pressurized when you're done flushing, yes mine's the same.


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Old 07-10-2013, 07:13 AM   #4
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Yes, that is normal and it is working correctly.
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Old 07-31-2013, 08:55 PM   #5
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buzzmonster, I installed tank rinsers in both the black and gray tanks on our 2005 Flagstaff back in 2006. When I put the bottom pan back on I left a small access hole just below each tank where the rinser was installed. Occassionally I would get a few drips of water from the backflow valve. So, like the other guys, I think it is normal. BTW, if you put the rinser in trying to make the tank meter more reliable...don't hold your breath. I always began the rinser as soon as I pulled the gate valve for each tank in order to prevent anything from sticking to the tank walls. I ran the water until all water coming out of each tank was clear. Guess what, the gauge was still unreliable and a piece of "crap". No pun intended. LOL
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Old 07-31-2013, 09:07 PM   #6
Join Date: Jun 2013
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Just had to deal with a black tank rinse issue on a factory installed system. I learned a lot in doing the work myself. As it turns out the hose connection goes way up a pex pipe to a spot by the master bath vanity that is very hard to get to. It enters a B&B 517 vacuum break backflow device, then exits back down to the sprayer in the tank. When you put water in the hose connection it closes the vacuum break and opens the backflow valve and water (normally) goes to the sprayer. It also makes a very loud vibration noise. When you disconnect the hose when you are done, the backflow valve closes, the vacuum break opens and the water up to the B&B 517 pours out of the hose connection. This is normal operation.

In our case it worked 5 times right and then the 6th, 7th, and 8th time the vacuum break didn't close and water came dripping down into the cargo bay. Contacted B&B, they sent a new 517 and an envelope to send back the defective one.

My guess is that the water from the backflow valve to the sprayer stays in the pipe until the next use, unless some air can leak into the pipe from the sprayer end. Kind of like putting your finger over the end of a straw and pulling it out of a glass of water.


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