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Old 10-05-2011, 07:19 AM   #51
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I had the same problem with both overflow tubes on a 2008 322FKS. Solved it with the attached mod. Joined the tubes and added a shutoff.


Now I open the valve when filling and close it after full and while traveling.

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Old 10-05-2011, 07:28 PM   #52
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wasted water

Well Im not running out of water now, got that problem fixed. Now when my pump stops pumping water to my taps , I still have 15 gallons or so still in my fresh tanks. So that will be my next thing to get fixed while it is still under warranty.Also I will have to get my table replaced,The table bubbled up or the plywood has lifted under the coating of the table,the edges and the top is all still intact ,just has a hump inside of it on the corner.

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Old 10-06-2011, 04:23 PM   #53
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Originally Posted by Kenelz View Post
I have a '12 as in signature and found I have this problem also, so apparently the problem has not been corrected on new units.

I filled at a campground where I stayed the night before, about halfway on my way to a week of boondocking. I had about 250 miles to drive with the full tanks. I pulled in a rest stop and an elderly couple pulled up to me and said they were behind me and I had water streaming out of the hose/hoses (he pointed at my overflow hoses).

I had some duct tape, so I bent the hoses over (pinching them off) and taped them that way. Off the freeway I made a turn and noticed water coming out of the hose again, the duct tape came off and released more water. I don't know how much water I lost, the FW gage read 2/3, but I made it through the week OK. I was alone.

Yesterday I went to Home Depot to figure out what I could do to fix. I bought two Pex barbed fittings with 1/2" treads, and two 1/2" PVC caps. I will remove the caps when filling, then put them on for the trip. It would be easy to screw on a couple valves instead of the caps, but the caps are much cheaper.

I just wonder if the tank is vented so I could leave the caps on after getting to the destination, I don't want to collapse them.

I just did a search and found this thread, very interesting! Looks like the problem has been around for a while.
My 2011 22FB has the 90 gallon fresh water tanks and I have taken 2 weeklong trips with it. Filled the tanks full and have not lost any water - meter reads full and we seem to have lots of water - i am not new to RVs and know about water useage - love the big tanks!
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Old 10-06-2011, 07:33 PM   #54
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Originally Posted by Flashman View Post
My 2011 22FB has the 90 gallon fresh water tanks and I have taken 2 weeklong trips with it. Filled the tanks full and have not lost any water - meter reads full and we seem to have lots of water - i am not new to RVs and know about water useage - love the big tanks!
Love the big tanks also! A big reason I bought the Flight was the 90 gallon tanks. I mostly boondock and the weak point without hookups is fresh water. I have a generator, can "shake the bush Boss", and dump dishwater, but you learn to conserve water. Thats why I was disapointed on losing it through the overflow.

On weekend trips I only put 30 gallons in and its more than enough.
How do I know I have 30 gallons? I put a five gallon bucket by the trailer, drag the hose to it, and time how long it takes to fill the bucket. Then I know how long to let it run into the tank to get the 30 gallons.
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Old 11-19-2011, 04:14 PM   #55
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Went back to my dealer - where I bought my Jay Flight - a couple of months ago to ask about factory accessories. They were clueless!!

I started talking to the service manger about the fresh water tanks:

He told me not to fill them up before a trip - instead - find a place near where I camp to fill them up. If I filled them up the constant travel would cause the tanks to break.

I boondock in Az all the time - hello there is no place to get water before the camp spot - one of the reasons I bought this camper was the 90 gallon tanks!

Have been RVing for 15 years and not heard of this before - and not had any problem with the fresh water tanks.

Was buying a Jaco a mistake?
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Old 11-21-2011, 08:44 AM   #56
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One of the reasons I purchased my Jayco was the large water tanks. I am a boondocker and a large fresh water supply is very important to me. I would like to share with all of you what I have figured out since taking ownership of my 23fb.
All of you who are mentioning that your overflow tubes will leak water going down the road are correct. This is how it was explained to me. Jayco uses very shallow wide tanks. If you fill them to the top and then go down the road pressure build up can cause them to swell. Jayco,s answer was to install over flow tubes to prevent over filling. These tubes will spill water going down the road. The cure for this is to add valves to the over flow tubes. I added a fitting to tie the tubes together and extended the hose so that the valve is beside the fresh water drain valve. I open the valves when i fill and then close when traveling. This has solved the problem. The other problem that the wide shallow tanks creates is being able to use all the water in the tanks. The pickup for the pump is on the side of the tank near the bottom. Normally this would be ok, but with the shallow wide tank a half and inch of water in the bottom leads to several gallons left in the tank. My trailer would leave 10 to 15 gallons in the tanks. My solution to this was some replumbing. I plugged the pickup fitting. On the bottom of the fresh water tanks are 2 fittings, one on each tank. These are the 2 drain valves you see in front of the tires. I replumbed these fittings into one hose so I only have one drain, i also installed a T and hooked my pickup for the pump to this T. I now have one drain valve and can use all my fresh water. If you have an underbelly as i do this requires opening the belly to do the plumbing. I hope this helps.
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Old 11-21-2011, 09:16 AM   #57
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Welcome to the Jayco Owners Forum IdahoSpud! Sounds like a good fix. Thanks for sharing!
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Old 04-22-2012, 03:22 PM   #58
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Thanks for this thread! I was trying to figure out how we used so much water, when our much smaller black and grey tanks weren't getting full. The photos were extremely helpful and I will be doing the repairs myself.

When I bought my trailer (at a show, and picked it up a couple months later) it did not have the arctic package they promised. The dealer tried to weasel out, but finally agreed to add the bottom cover (although I know I don't have the extra reflective insulation in the ceiling). They put the cover on fine, the only problem was they did not daylight the overflow tubes. I was filling the tanks until I found water coming out from the underbelly cover. Rather than haul it all the way back down (over 100 miles), I partially removed the cover and cut a hole to pull the overflow tubes through. So now I have access to them to put on the shutoff faucet.

Sheesh - you buy a new trailer and you think that it is all ready to go...another thought coming. By the way, I have a Starcraft 235fb, but it is nearly identical to the Jayco equivalent, and was probably made at the Jayco plant at the time.

Thanks again guys and gals. You've been a lifesaver (and a water saver!)
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Old 04-22-2012, 05:40 PM   #59
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I wondered whether or not the second hose was a low point drain as well, until I accidentally overfilled the tank, and water came out both hoses. Question answered.
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Old 04-22-2012, 06:39 PM   #60
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Yep - on mine when filling, one hose starts running first - then a bit later it starts coming out of the second hose.

Adding a valve or clamp is now on my short list. Thanks!


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