Do Not Overfill Your Fresh Water Tank!

[Rivernerd]

I hope this issue has not previously been addressed on the forum.  I could not find anything on this topic with a search.  So, here goes.

I have always assumed that the fresh water tank in our 2022 Elite II could be filled until water flows out of the overflow tube underneath the fridge, regardless of the fresh water sensor reading. 

This approach is recommended on p. 61 of our 2022 Oliver Owners Manual:  "fill until water starts to run from the freshwater overflow..."  I have regularly done just that with no issues--until a few days ago.  When filling the fresh water tank, the aisle floor bulged upward, the entire trailer shifted to the curb side binding the door, and then, with a loud CRACK, the backsplash on the sink side of the galley countertop separated by about 1/2" from the fiber granite countertop, because the corner of the countertop near the sink was sloping toward the curbside!  After we recovered from the shock, my wife and I immediately ran fresh water (via the pump) into the gray water tank through the galley sink until the trailer shifted back into equilibrium.  Fortunately, this enabled the aisle floor to level out again, the door to unbind, and the countertop to slowly rise up again to meet the backsplash, so the two once again line up.

When we get home, I plan to re-caulk the joints that separated, and carefully inspect for any additional damage.  So far, all appears to be "back to normal" while we continue our extended trip.

Lesson learned: despite what is recommended in your Owners Manual, monitor the fresh water tank level when filling, and once the sensor reads close to 100%, SHUT OFF THE WATER!  DON'T WAIT FOR WATER TO FLOW FROM THE OVERFLOW TUBE!

[Dean and Mary]

Wow, I’m really sorry this happened. I’ve heard of similar issues with other trailer brands when there’s little or no effective overflow outlet. That’s why most trailers are filled using a flex‑hose insert—to let air escape properly. With the direct connection on our trailers, it’s difficult to manually fill at the inlet and allow that air to escape. In your case, it sounds like the overflow tube may have been restricted, or the incoming water volume and pressure simply exceeded what the overflow tube could handle.

Thanks for sharing this experience. And again, I’m sorry you had to deal with it.

[Townesw]

@Rivernerd
Remove the drawers on the left side of the drawer stack under the kitchen sink. Look for a hatch plate in the bottom of the cavity. If you have one you should be able to remove the overflow tube to check for and remove any obstructions. 
 

 

 

 

The service dept cut that hole and installed the hatch in May 2018 when I suspected that the hose clamp on the through-hull fitting was loose. I have on my to-do list (still) to enlarge that opening to allow easier access to that area between the hulls. I think the factory started placing that access hatch in trailers built after that.

 

Bill 

2018 Hull 313

Edited 4 hours ago by Townesw

[Rivernerd]

Townesw:

Thanks for the tip.  I neglected to mention that water was actually flowing from the overflow tube when the trailer shifted, yet the bowing/damage still happened.

Our 2022 hull #1291 has a 1/4" plywood cover over a hole in the location you described.  I plan to remove it and verify if there is an obstruction of the overflow tube.

That said, I still plan to monitor the fresh tank sensor when filling, regardless of what I find!

[Steph and Dud B]

Wow. Sorry you went through that! Hope everything's ok. Unfortunately for us, going by the tank monitor is ineffective. It reads full long before the tank is actually full. We will use a pressure regulator when filling and monitor closely, though. Thanks for the warning.

[Rivernerd]

Steph and Dud B:

Good point re: using a pressure regulator when filling the fresh tank.  I have both a filter and a pressure regulator set to 35 PSI on the "trailer" end of my fresh water hose.  Both were in place when the event described above occurred.  

[DanielBoondock]

3 hours ago, Townesw said:

Remove the drawers on the left side of the drawer stack under the kitchen sink. Look for a hatch plate in the bottom of the cavity. If you have one you should be able to remove the overflow tube to check for and remove any obstructions ... I think the factory started placing that access hatch in trailers built after that. (2018 Hull 313)

By MY2026 its now accessible from a hinged hatch under the outside table that replaced the older propane fridge vent and there's no port under the drawer. You've got access to the back of the fridge, the overflow tube and further back you'll even find a 120V for the induction that theoretically could be used for something. 

Problem with the monitors is they get inaccurate unless you're perfectly level, and generally aren't super accurate anyhow. There's a new system in the 27's apparently, don't know if its actually much better.