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Old 01-12-2025, 06:36 PM   #1
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fresh water tank fill on a 2023 21RBS Creekside

Hi everyone. The last time I posted on iRV2 was when I was researching and asking advice for RV shopping. My wife and I did find the one we wanted last summer, 2024. It was a last year model deal (it is a 2023) and they wanted it off the lot so we did pretty good purchase-wise I feel. We bought it from Apache RV in Everett Washington during the RV show in Monroe Washington. After walking the whole show checking things out we headed to the Northwood showing which I saved for last because through previous research I felt pretty sure I wanted a Northwood. Little did I know I would be buying an RV that day. It turned out well and has been on 3 trips to Montana so far.

After a couple fills of the potable tank I realized I had water dripping between the big drain pipe and the coroplast (I think that is what the belly material is called). It does stop when I drop a few gallons from the tank. I can't determine if I have a problem through the literature received with the RV. All I can see is it says to immediately stop filling when the tank full light comes on and I'm sure I've gone beyond that. Do I have a problem? Is there an overfill drain in the system and everything is working as is should? Is it as simple as that?

thank you, -dale
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Old 01-12-2025, 06:55 PM   #2
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I don't have a real answer for you but it seems odd that overflow does not come out a drain line of its own, not dump into the layers of the flooring. Did somebody forget to cut the hole for the line to poke out?
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Old 01-12-2025, 07:58 PM   #3
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I would guess that the overflow tubing came loose or was never secured. It is a line that parallels the tube that fills the tank. No you should not have this happen. I would contact the dealer. They may have to pull back the coroplast and possibly replace some of the insulation as well.
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Old 01-12-2025, 10:37 PM   #4
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‘19 21RBS. I’m looking for some variables: 1. You fill the tank, it drips. The trailer sits over night. Still dripping? 2. You drive a couple hours to your destination. Still dripping? 3. You use the water a couple of days for flush, shower, dishes, cooking. Still dripping? 4. Is the handle for the drain pushed all the way in?
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Old 01-13-2025, 10:21 AM   #5
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Like mentioned it sounds like a leak thats higher up on the tank. Could be a crack/hole or ?.

I know with most all fresh water tank gages the tanks never full when the gage says full. I have to add another 7-10 gals to my 70 gal tank. If I'm filling the tank to get it full I fill till the overflow flows water. You have to monitoring the fill because it will happen quickly at the end.

You should have a small hole next to your larger hose opening. That's your overflow.
When the tank reaches full it will spill out of the overflow and at times out of the hose opening.

What's weird is you only fill to the full light on the gage. If you have a leak at that point then the tanks not really full yet so it may not be the overflow hose because that would need to be higher up on the tank.

You should still be under warranty since the 2023's only 6-7 months used. I would call Apache and let them know whats going on.
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Old 01-14-2025, 01:56 PM   #6
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Quote:
Originally Posted by Rushy View Post
I don't have a real answer for you but it seems odd that overflow does not come out a drain line of its own, not dump into the layers of the flooring. Did somebody forget to cut the hole for the line to poke out?
Thank you Rushy. I think you may have it. I pulled a panel under the stove to do a bypass on the water heater for winterization and noted that there was an overflow parallel to the fill line down through the floor...but...i don't see it coming out the belly. It has a crimp style clamp so I'm sure that end is okay.

I have an appointment at Apache.
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Old 01-14-2025, 02:05 PM   #7
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Quote:
Originally Posted by tpaul View Post
I would guess that the overflow tubing came loose or was never secured. It is a line that parallels the tube that fills the tank. No you should not have this happen. I would contact the dealer. They may have to pull back the coroplast and possibly replace some of the insulation as well.
Thank you tpaul for confirming something is not right. I found the overflow tube yesterday when I pulled a panel to get to the water heater (so I could bypass it for winterization). It does parallel the fill and on through the floor. I do not see it coming through the belly though. It is clamped securely at the top with a crimp style clamp and I'm confident it is secure. This is quite an oversight! This has been a good experience for me to learn a bit more about the system. I'm sure I'll get behind the coroplast someday but for now I'll have it done through warranty. I have an appointment with Apache RV to help this time. And I appreciate the tip about insulation. I hope they would fix that as a matter of course but I'll make sure it gets into the work order to check.
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Old 01-14-2025, 02:29 PM   #8
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Originally Posted by Cumminsfan View Post
Like mentioned it sounds like a leak thats higher up on the tank. Could be a crack/hole or ?.

I know with most all fresh water tank gages the tanks never full when the gage says full. I have to add another 7-10 gals to my 70 gal tank. If I'm filling the tank to get it full I fill till the overflow flows water. You have to monitoring the fill because it will happen quickly at the end.

You should have a small hole next to your larger hose opening. That's your overflow.
When the tank reaches full it will spill out of the overflow and at times out of the hose opening.

What's weird is you only fill to the full light on the gage. If you have a leak at that point then the tanks not really full yet so it may not be the overflow hose because that would need to be higher up on the tank.

You should still be under warranty since the 2023's only 6-7 months used. I would call Apache and let them know whats going on.
I went through a panel under the stove yesterday to access the hot water tank so I could bypass it (for winterization) and low and behold there was my fill and drain lines running parallel down through the floor. I'm confident the overflow tube is secure at the top with the crimp style clamp.

I have been filling until the water was almost coming out of the fill and not worrying about the gauge. It is at this level water was dripping underneath. Upon dropping about 5 gallons which would put the level below the overflow the drip stopped and the gauge still showed full. So I knew it is coming from the top but just doesn't have anyplace to go but between the fresh tank drop pipe and coroplast. I'm not leaking now after dropping some water, and am fine except for sloshing when driving which I'm not doing now anyway. And I think the gauge is fine, I was just overfilled.

I have an appointment with Apache!

Thank you Cumminsfan.
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Old 01-16-2025, 04:57 PM   #9
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Our early 2023 24RLS Titanium developed a water leak at the overfill connection due to an incorrectly assembled nipple.

It was fine for two “get acquainted” trips where we had full hookups and I only filled the water tank about 1/2 way based on two LED’s lighting on the control panel.

On our first dry camping trip, as I’ve done on prior RV’s, I filled the tank at home until water came out the fill point to have the maximum for the trip. The four LED’s had lit before the overflow came out the fill point.

When we arrived at the site, which sloped to the passenger side, water ran out of the belly and we were down to 3/4 water level, again based on the LED’s. No additional water leaked out for the days we were there. We did have plenty of water compared to our prior Lance 1181 camper, but we knew something was wrong.

Back to the dealer and they found the overfill connection hadn’t been properly spin welded to the tank and was leaking.

Outdoors RV shipped a new tank with the “next” trailer delivery after getting the replacment in and then into production, which meant we had a wait, along with a few calls. We’ve not had any issues with the tank, level suggestion LED’s or drain.

BTW, the entire underbelly was not removed. A square large hole was cut to easily access the underneath and drop the tank. I was more than a bit surprised and discussed with the dealer and then the tech about this. The technician knew where to cut to allow access without getting near the other plumbing and wiring. He had been great about a couple things when we picked the trailer up so he convinced me I’d appreciate his work if I need to replace drain valves or anything else.

The oversized “patch” is nicely attached and will simplify any additional work that may be required in the future.
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