Water set to City, still fill tank

[looknow12]

Hi all, Imagine 23bhe here. I took delivery before the winter and the city water function was working fine.

We went out on a trip 2 weeks ago using the fresh water. Everything was great.

I brought TT back to house and switched to City Water after emptying the tank and it slowly fills the tank. I'm keeping the pump off.

I've read thru the forums and heard about the check valve under the seat near the pump and I'm guessing there is something near the City/Fresh lever.

Any ideas?

Thank you

 

[NB Canada]

Was the city water hose under pressure when you switched it?


2021 Imagine 2400 BH
2018 GMC Sierra 4x4 crew

 

[looknow12]

Was the city water hose under pressure when you switched it?


2021 Imagine 2400 BH
2018 GMC Sierra 4x4 crew

No. But the pump might have been pressurized at the time.

 

[SteveO]

No. But the pump might have been pressurized at the time.

From what I understand, the whole plumbing system should be under no pressure when switching between city water and fresh tank fill. That means no pressure at the city hose, pump off, and open a faucet, then move the selector.

If your check valve is bad on the pump, or adjusted incorrectly, then your fresh tank would fill when the selector is on city water. An idea I had once for checking this is the following:
- Switch your pump inlet hose to the antifreeze input
- Take the cap off your antifreeze hose and put it in a five gallon pail
- Connect your city water input, making sure the selector valve is on City Water before
- Wait some time and see if the pail starts to fill

If the pail fills with water, then I would assume your check valve is bad. Otherwise it's maybe something with the selector valve

Good luck with everything, and let us know how you make out.

 

[looknow12]

Yes it must be one of the check valves. The one near the pump or by the lever. Any idea how I test that? The nautilus panel seems like a lane to take down

 

[looknow12]

So something to add. This morning with the lever to City Water, water supply off, I turned on the pump and it kept cycling.

I could hear water turning over. I went to the panel and could hear air or water moving. That's strange since the water supply valve was 100% off. I switched to Fresh Water Fill and it all stopped, no noise no pump. If I turn the water on with Fresh Water, I also notice a small streaming leak coming down the panel from the handle.

 

[SteveO]

So something to add. This morning with the lever to City Water, water supply off, I turned on the pump and it kept cycling.

I could hear water turning over. I went to the panel and could hear air or water moving. That's strange since the water supply valve was 100% off. I switched to Fresh Water Fill and it all stopped, no noise no pump. If I turn the water on with Fresh Water, I also notice a small streaming leak coming down the panel from the handle.

Based on that, I would say your diverter valve, which attaches to the blue handle you see, is bad. If you're still under warranty, I would suspect Grand Design may send you a new one. Should be fairly straightforward to install with some plumbing knowledge. Just FYI, I think the part is https://www.granddesignrv.com/owner-support/parts/detail/22051 or https://www.granddesignrv.com/owner-support/parts/detail/66715 but support will know for sure.

 

[kamakazi98]

Just something to throw out there to prevent you from having to walk back and forth from your trailer to the water source. (Inline shut off valve to add before it screws into your unit, shut it off right there at the trailer) Best of luck and hope it's an easy fix for you.

 

[looknow12]

Thank you. Yes I have a three way splitter to send all the air out of a host before it enters the RV and the splitter has shutoffs to the two outputs.

I spoke to Grand Design and they believe it is the valve. They are sending a new one out.

 

[looknow12]

Hi all. So Grand design sent out the valve. To be clear, this is the valve that diverts Fresh Water Fill or City Water.

How do I get this panel down? See pictures. I removed the angle bracket and wood cleat (not shown anymore). But the passage way to get the valve out into the open so I can replace and change connections is way too small.

I removed the hose pass through plastic sill thinking the main panel was wedged by that and the angle bracket, but it seems immovable. Do I need to remove the panel in the bedroom?

 

[SteveO]

Hi all. So Grand design sent out the valve. To be clear, this is the valve that diverts Fresh Water Fill or City Water.

How do I get this panel down? See pictures. I removed the angle bracket and wood cleat (not shown anymore). But the passage way to get the valve out into the open so I can replace and change connections is way too small.

I removed the hose pass through plastic sill thinking the main panel was wedged by that and the angle bracket, but it seems immovable. Do I need to remove the panel in the bedroom?
View attachment 33793
View attachment 33794

How is the white panel you see attached to the 1x1 behind it? If it's only the few screws you can see by the cable and power outlet, take those out. If it's secured from behind, then check how the 1x1 is attached to the trailer and see if you can get those screws out. Failing that, go from behind by removing the panel you suggested. Good luck!

 

[looknow12]

There are 4 screws holding the 1x1 cleat you mention. There is no way GD did this after everything was put together.

Two of the screws are all the way in by the side of the trailer. So trying to get a screwdriver the width of the panel.

Anyway, I managed to get those screws off and was able to squeeze the panel a bit. See pictures. But how do (and forgive me for asking) you get these hose clamps off? Do I need to cut the hose off? I don't mind destroying these clamps I have normal ones.

 

[SteveO]

There are 4 screws holding the 1x1 cleat you mention. There is no way GD did this after everything was put together.

Two of the screws are all the way in by the side of the trailer. So trying to get a screwdriver the width of the panel.

Anyway, I managed to get those screws off and was able to squeeze the panel a bit. See pictures. But how do (and forgive me for asking) you get these hose clamps off? Do I need to cut the hose off? I don't mind destroying these clamps I have normal ones.

View attachment 33808

Assuming you are talking about the silver bands? If so, those are PEX clamps.......I can hear you already saying, but that's not all PEX hose . And you would be correct. In your photo the solid blue hose is PEX, but the hash marked pipe is soft hose. And with that you enter the wonderful world of soft hose used in RVs with pex fittings. There is lots of information online about this, but the short of it, the soft hose has a larger inner diameter than PEX, and it's really difficult to get pex clamps back on. As well, since the PEX fitting is too small for the hose, it can leak.

To get them off though, you can use pliers to pull them back, and then you'll need to use a pex crimper to get them back on, but again that's if it's PEX. If it's the soft hose, you should really use a barbed hose fitting with a hose clamp. The barbed hose fitting will have the correct diameter for the larger hose Problem with that, is now you are changing fittings and need to convert between PEX fittings and hose fittings. Again, wonderful world and lots of info online about this.

Just wondering, why do you need to take those off? Is the valve not using a threaded fitting that can screw onto the black swivel fitting?