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Old 08-21-2015, 12:21 PM   #1
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over flowing toilet while driving

What is going on here?
3rd time it's happened so it's not a fluke.
The scenario is we disconnected city water with a half tank for the road. Switch the pump on and start driving so the kids can use the bath or the wife can do whatever she does.
I pull over for a stop and go back there the toilet is filled all the way with overflow on the floor, we could still see it sputtering from the squirter in the bowl a little when we flushed it down. Now there is still plenty of water in the fresh tank but the pump seems to have lost its prime as only a trickle will come out and it only runs briefly. The water filter housing is nearly empty of water and the pump isn't running to build pressure. Soon as it's back on city and the filter housing has refilled and we leave again were back to pressure as normal until this happens again.
My kids arent doing this and I haven't owned it long enough to take off with the pump off, that's next test obviously but does anyone have a clue what this is all about??
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Old 08-21-2015, 12:25 PM   #2
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Debris in the valve holding it open?
Doesn't happen on city water?



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Old 08-21-2015, 12:45 PM   #3
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Forget the pump. If it's filling on its own you have a toilet issue.
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Old 08-21-2015, 12:48 PM   #4
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No debris, appears to have a good seal as it will hold water.

Does not do it on city connection.

What could it be if it was in the toilet I wonder?
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Old 08-21-2015, 01:01 PM   #5
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We never travel with the pump on. When a need for water arises ... we simply turn on the pump, then back off when done. I wouldn't want water sloshing around in the bowl on the road.
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Old 08-21-2015, 01:11 PM   #6
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Yeah that's the obvious option to leave it off but we prefer to run with it on so the kids don't continually bother us. On my Gass winny for 55k miles I've always left it on and never saw this.

And following up on the notion of forgetting the pump...I can't overlook ot because it is currently on, with half a tank and the best it can do is dribble for 8 seconds before going dry again. It loOKs like it's 2 issues but I suspect it's singular
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Old 08-21-2015, 01:14 PM   #7
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I travel with pump on no problems so far.


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Old 08-21-2015, 01:34 PM   #8
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This is a LONG shot, but.... maybe the valve in the toilet is weak and without the pressure from the city water hookup, it doesn't close all the way ?

Just a guess. I'll go back to my corner now and be quiet.
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Old 08-21-2015, 01:37 PM   #9
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Well that's easy enough to test later today I think
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Old 08-21-2015, 01:47 PM   #10
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Quote:
Originally Posted by KennyGolub View Post
This is a LONG shot, but.... maybe the valve in the toilet is weak and without the pressure from the city water hookup, it doesn't close all the way ?

Just a guess. I'll go back to my corner now and be quiet.
This was my thought also. Your pump may be weak (which is what you are stating), and it shoves just enough water through your full lines to fill the bowl, but won't suction. You may also check to make sure your winterizing valve is set to draw from your tank (if you have that option).
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Old 08-21-2015, 01:54 PM   #11
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Pull the valve, clean and lube with Danco Silicone grease. It is filling with the residual pressure in the lines with the pump off.
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Old 08-21-2015, 02:48 PM   #12
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I can do that for sure, I will note however that it only fills with the pump on. So here's my update as I'm in it right now (as a passenger) the pump was off for the last hour and my wife had left the kitchen faucet set to wide open by mistake. I closed the faucet valve, turned on the pump and checked it, it was not building pressure at all, no flow.
I then checked the toilet and noted the slightest trickle from the bowl sprayer, I stomped the valve open and it started spraying full blast sputtering at first to purge the air and water, now all pressure is restored and the bowl is currently not filling itself.

What's the deal with that,lol?
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Old 08-21-2015, 04:23 PM   #13
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Air in the lines caused a lack of hydraulic pressure. Once the pressure was restored the valve seated and the flow stopped. It still seems like your pump is the culprit, and the toilet valve seal is a secondary, as it stops leaking if under constant pressure, should seal under any pressure situation.


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Old 08-21-2015, 05:17 PM   #14
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Suppose that is the issue, what in the pump needs to be rebuilt or how do I test for replacing the whole thing? Pressure is just fine, now
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Old 08-21-2015, 07:24 PM   #15
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Kohesh, Mine did the same overflow a couple of weeks ago, except my water tank was below the pump input line, so it was sucking air. Every so often the pump would "catch" some water. It appeared the "demand" for the pump stayed on, and it just kept pumping. I ended up turning the pump off and ultimately replace the pump. Hope that helps! Craig


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Old 08-21-2015, 07:36 PM   #16
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Check to make sure your winterizing valve is fully closed. If open slightly, it will suck air which will then build up in WH and lines and may cause the issue you are seeing.
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Old 08-22-2015, 12:16 PM   #17
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Kennygolub's right....it's gotta be a weak toilet flush valve.
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Old 08-22-2015, 02:01 PM   #18
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It needs a new flow valve. Our 2015 Berk did the same thing on the way home from the dealer. Valve is a 10 buck part.
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Old 08-22-2015, 09:42 PM   #19
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Great community here, THANKS Definitely what it is. toilet started running today after pump builds pressure from, stomp the pedal, then it seals-problem done.
So, my coach is sitting at FL Gaffney right now for some other issues, anybody know the part # or can point me to a parts list/diagram for the correct commode?
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Old 11-02-2015, 01:01 PM   #20
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I have a followup for this thread. It turns out the the root cause of all the water related issues I experienced were a result of the water filter. I would not have thought it to be so, but without a filter in place, and later with a new filter installed All of my issues have passed. Even more surprising was the weight of the old filter, i suppose that is a good thing. I believe the toilet overflowing was a result form inadequate pressure to keep the valve closed
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