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Old 09-02-2014, 09:48 AM   #11
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We almost had an oops like that in 2010. I was doing the old flushing procedure, wife was inside cleaning. She hollered that the toilet was gurgling. At the same time I heard the vent stack gurgling. One of those oh crap, visualize what's fixing to happen, remember what you were supposed to be doing moments. Just in time, I pulled the dump valve. I had gotten distracted and went off doing something in the shop. That is the only, and last time that happened. Now, I refuse to get distracted, and become one with the poop tank cleaning.
What an interesting choice of words!
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Old 09-02-2014, 11:00 AM   #12
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Oh, and yes, the ideas for a variety of mods are already forming for ways this could have been prevented. Stay tuned!
I can understand how the toilet flange leaked right at the floor. Its a gravity flow joint to below, not a pressure fitting. I can understand how it never reached the vent, it would require about 7-8 psi to get that high, would likely relieve other places first. That vent is only for gases.

Can't understand why the Rhino was open to the tank, don't you normally keep that closed?
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Old 09-02-2014, 11:16 AM   #13
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SO how may gallons do you think got into your camper? And was it all contained within the tub area or did it get onto the wood subfloor?
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Old 09-02-2014, 12:02 PM   #14
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Crazy/cute story about the determination of a 4-year-old! He was going to get some water for his water guns, come heck or HIGH WATER!

Ugh. So sorry this happened to you. What an awful cleanup job.
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Old 09-02-2014, 12:06 PM   #15
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OK so this is a practical application of that warning sticker that says "do not operate turboflush with black tank closed"...sorry it had to be you

So, if your tank was already flushed (thank goodness!!) what probably occured was water was flowing in and ambiant air was being vented out the roof. At some point the tank became full and water pressure slowly was filling the roof vent. Since water is heavier than air, the tank probably pressurized (distended) as the path of least resistance to the incoming water.

We would have to know the tensile strength of the black tank (seals, seams, and material) before we could speculate what would happen had you not caught the water when you did. SKnight's math on Water PSI would come into play as well so @ .45 PSI going up the vent AND up to the seal on your toilet. Once the toilet seal "filled" the only way "Up" would be the vent.

Sooooo long story short, your DW essentially pushed the plunger on a water land mine when she "flushed" the toilet, pressure from black tank+water backed up to seal+ who knows how much PSI from the tank and vent shot the water up from the toilet and hit the ceiling.

If I were the tech at your RV service center I would want to check - just to be sure - that all the seams and seals on the black tank are intact and not damaged in any way.
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Old 09-02-2014, 12:49 PM   #16
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I can understand how the toilet flange leaked right at the floor. Its a gravity flow joint to below, not a pressure fitting. I can understand how it never reached the vent, it would require about 7-8 psi to get that high, would likely relieve other places first. That vent is only for gases.

Can't understand why the Rhino was open to the tank, don't you normally keep that closed?
Yep, the Rhino was closed to the tank... Until I pulled the valve to dump the tank because I knew it was under pressure.
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Old 09-02-2014, 12:56 PM   #17
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OK so this is a practical application of that warning sticker that says "do not operate turboflush with black tank closed"...sorry it had to be you

So, if your tank was already flushed (thank goodness!!) what probably occured was water was flowing in and ambiant air was being vented out the roof. At some point the tank became full and water pressure slowly was filling the roof vent. Since water is heavier than air, the tank probably pressurized (distended) as the path of least resistance to the incoming water.

We would have to know the tensile strength of the black tank (seals, seams, and material) before we could speculate what would happen had you not caught the water when you did. SKnight's math on Water PSI would come into play as well so @ .45 PSI going up the vent AND up to the seal on your toilet. Once the toilet seal "filled" the only way "Up" would be the vent.

Sooooo long story short, your DW essentially pushed the plunger on a water land mine when she "flushed" the toilet, pressure from black tank+water backed up to seal+ who knows how much PSI from the tank and vent shot the water up from the toilet and hit the ceiling.

If I were the tech at your RV service center I would want to check - just to be sure - that all the seams and seals on the black tank are intact and not damaged in any way.
Yep, I have it on my to-do to get ahold of them and have that checked. That's my biggest fear, that I might have not ruptured, but did possibly bulge and therefore weaken the tank.

In the future, I'm thinking about borrowing a mod from your book Bob. I'm thinking about getting one of those water leak alarms and hooking it up to a couple of probes stuck to the top of the tank. I figure 110 DB should let me know my tanks are full. I haven't worked out the particulars of that design yet though, like how to prevent false alarms when you flush and the water splashes, etc...
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Old 09-02-2014, 03:35 PM   #18
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As they say
..."if there is no pictures-it didn't happen"
LoL j/k
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Old 09-02-2014, 03:58 PM   #19
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I wish I did get pics, I'd have been able to give them to the dealer to help his diagnosis.

But unfortunately, taking pictures is not exactly the first thing on your mind when dealing with a trailer full of 'pooh water' as the kids were calling it.
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Old 09-02-2014, 04:00 PM   #20
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As they say
..."if there is no pictures-it didn't happen"
LoL j/k
Sorry beat ya to it Kuba

It happened and here is the photos...
Dang it....
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