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Old 04-28-2015, 01:30 PM   #1
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Can't Fill Fresh Water Tank to Save My Life

Since 6 AM this morning I have been attempting to de-winterize my new Jayco Jay Flight 23RB travel trailer and I can't get past step one...filling my fresh water tank 2/3 of the way full with fresh water.

I have hooked up my hose to a outdoor spigot. I have tried both higher pressue and low pressure. In either case water comes out the other end. I have tried just using the end of the hose and I have tried attaching a Camco RV Fresh-Water Tank Filler w/ Pressure-Sealed Valve. Under ANY circumstance water comes flowing back out the opening. I have tried putting it barely in, I have tried putting it in 1", and I have shoved it all of the way in. No luck.

I went under my sink and I played with the valves. There is a clear hose there with no fitting on the end. I assume this is to fill the hoses inside the camper with antifreeze in the winter. Based on my online search, manual search, and conversation with the dealer that hose should be in the "off" position (perpendicular to the existing hose) and the other valve with the white hose leading to the pump should be in the "on" position (in line with the hose). But just to be sure, I've tried it ALL ways.

Then I was told to turn on the pump. Antifreeze came out of the faucets, followed by air. In other words, the tank wasn't already full. I was then told to check the valves behind the water heater. I wasn't sure what good this would do, other than pump anti-freeze into my water heater, which I was told once NOT to do, but I did it any way. I turned on the water pump, could hear trickling, waited 6 minutes, and the pump did not turn off (indicating the water heater was full). So now I have a water head 1/2 full with anti-freeze I assume. Great.

I took out a 4' piece of hose and placed it inside the gravity spout on the outside of my trailer (NO, I'm not trying to fill up my tank through the city water connector...I have been asked this a dozen times this morning) to see if there were any obstructions. NO, the hose goes all of the way in without stopping.

I think tried putting my thumb over that little screen next to the fresh water tank spout wondering if there was some sort of air problem. Didn't work.

I'm at wits end. I'm really teed off. This shouldn't be this difficult. If I can't figure this out today I need to load everything up and drive 80 miles to my dealer. Any ideas?
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Old 04-28-2015, 02:07 PM   #2
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Not sure I follow you ,but if tank isn't taking anymore water that means it is full!
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Old 04-28-2015, 02:17 PM   #3
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Where are you filling it? Hose connection?
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Old 04-28-2015, 02:26 PM   #4
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Sounds like your overflow tubes are clogged, look for one or two white plastic about 1/2 inch diameter tubes on the side of the fresh water tank, might be located on the other side of the drain plug, not familiar with your trailer, they serve as vent pipes as well, that is why you can't fill the tank up, hope it helps
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Old 04-28-2015, 02:59 PM   #5
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Quote:
Originally Posted by dennis b View Post
Not sure I follow you ,but if tank isn't taking anymore water that means it is full!
But it's not. The water meter says it is empty. And I turned on the pump to fill the water heater and the pump should have turned out when full. It did not. And when turning on the faucets there should have been water coming out after the antifreeze did. It did not. And lastly, I opened the low point water valve on the bottom of the trailer and no water came out.
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Old 04-28-2015, 03:00 PM   #6
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Where are you filling it? Hose connection?
NO. This is now the 13th time I've been asked this. I am filling it in the fresh water/gravity intake. NOT the city water connection point.
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Old 04-28-2015, 03:02 PM   #7
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Sounds like your overflow tubes are clogged, look for one or two white plastic about 1/2 inch diameter tubes on the side of the fresh water tank, might be located on the other side of the drain plug, not familiar with your trailer, they serve as vent pipes as well, that is why you can't fill the tank up, hope it helps.
Makes sense. But for me to decipher that on my own would be insane. I guess I just need to close camp and lug everything back to the dealer. Not at all happy about this turn of events.
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Old 04-28-2015, 03:03 PM   #8
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Originally Posted by Todd Klassy View Post

I took out a 4' piece of hose and placed it inside the gravity spout on the outside of my trailer (NO, I'm not trying to fill up my tank through the city water connector...I have been asked this a dozen times this morning) to see if there were any obstructions. NO, the hose goes all of the way in without stopping.
Is your tank translucent? If you do the above again can you see the end of the hose in the tank? What happens when you turn on the water in this scenario? If water runs out immediately your tank is full already.
What does your gauge say?

Hope you figure it out.
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Old 04-28-2015, 03:04 PM   #9
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What happens if you open the fresh water tank drain valve? (this is different from the low point water valve on the bottom of the trailer that you opened)
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Old 04-28-2015, 03:29 PM   #10
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If there's no water in your tank already, then it must be an air problem.

Does your trailer have an enclosed underbelly? If not, the tanks are super duper easy to find and decipher. They are the only translucent (whitish) things under your trailer. Your waste tanks will be black.

Get under your trailer, and find the FW tank(s); they should be very close to where your FW gravity fill is. There will be a drain hose coming out the bottom of the tank with a ball valve on it; the valve could be mounted some place on the frame and should be easy to access from a standing position. This is different than your Low Point drains, but could be labeled "Low Point Drain". Open that valve. If water comes out, there's water in your FW tank. If you can see from where the FW gravity fill fitting is on the side of the trailer, then examine it and make sure it is connected properly and not kinked.

Look toward the top of the tank, there should be a length of white pex tubing with nothing on the end, just a hose to nowhere; this is one of the tank breathers. Make sure it's not kinked or blocked in any way; you should be able to easily trace it with your hand.

There is one more breather and it's in the fitting at the gravity fill location and has a screen over it. You mentioned that you put your finger over it just to try. When you're running water in through the gravity fill, there should be some air escaping through this vent hole. If there's not, you have an air vent problem. Try just taking the whole fitting off. I think it has like 3 screws, but you'll need some pro-flex caulk to seal it back when you re-install it.

You still may end up taking it back to the dealership, but I hope this gets you started diagnosing the problem! Good luck!
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