Alde 3030 Plus does not have an Alde Flow tank, so there is only 1 Yellow Flapper Valve.

pthomas745 · December 2025

Found out this morning the Alde 3030 "Plus" in the new 400's (2025 and on) does not have an Alde Flow installed. Consequently, there is only one Yellow Valve in the Alde 3030 trailers.

You can see the single yellow valve circled in the photo below, buried under the harness for the Nautilus.

Image: https://us.v-cdn.net/5021717/uploads/editor/5f/yunpr6yl1mug.jpg

MOS2 · December 2025

So is this good or otherwise ?

pthomas745 · December 2025

@MOS2 very good question, and I have no idea. It could be simply a lack of space in the newer trailers, or some re-design like that. The Flow device needed a good foot or so of floor space. Looking at that photo seems to me that things are really crammed in, even the pump is "sideways".

Owners who had the Flow seemed to like it, and some owners here even installed their own. It is hard to tell what the real reasons might be for the new trailers not having the Flow.

MuttonChops · December 2025

3030 has slightly larger tank, Alde claims the 'flow' is built-in

Image: https://us.v-cdn.net/5021717/uploads/editor/68/fc9dk9uaiw3j.jpg

Adle 3030 Video

Binghi · December 2025

Looks like a good design change to me. Put it all together in one unit.

f1xedgear · December 2025

We apparently have the 3030+. (No description of it from the dealer at delivery walk-through, and our NuCamp welcome bag contained an Alde manual for the 3020!)

When I began the winterization process last month, I became quickly confused (something that comes pretty easily for me): there appeared to be no way to gravity drain the boiler tank, since the plumbing took the cold-water inlet piping from the one flapper valve up and over everything else down to the boiler inlet. I contacted NuCamp tech (included some pics), they replied, "It looks like you're right, I'm not seeing a 2nd valve there. In that case, your only option would be to blow out the lines with compressed air.” To confirm that the tank and inlet piping were effectively blown out, NuCamp suggested that I "disconnect the blue hose sharkbite from the Alde when you're done to see if anything else drains out. (probably put a towel down first).” I did as suggested, and no water drained out. Bit of a pain, but easy to do.

I’ve read the 3030 manual, and my reading of it provides no enlightenment of a way to gravity drain the boiler tank. Our 400 was built July 2024 (delivered June 2025). Maybe plumbing in more recent builds has been modified to allow for gravity draining—or maybe a gravity drain isn’t particularly needed for winterization? Attached is a pic of our Alde 3030+.

Image: https://us.v-cdn.net/5021717/uploads/editor/92/e49zzvvvsdu0.jpeg

Image: https://us.v-cdn.net/5021717/uploads/editor/az/zkunkfp5h1xt.jpeg

pthomas745 · December 2025

Well, this is fun.

What happened when you opened the Famous Yellow Flapper valve? Does that blue pipe come from the bottom of the Alde tank? So that if the Yellow Valve was open, the tank would drain? Or, does the yellow valve connect to the blue (cold water) line, and the blue pipe coming "up" in your picture is the supply line for the Alde hot water tank?

In most of the trailers with Aldes...the cold water low point drain and the Alde Yellow Flapper Valve had some "hot water tank" capabilities, because of the way cold water is delivered to the Alde.

So, some examination of that would be useful. I can't imagine the horrors of owners being told "just disconnect the push fitting and see what comes out".

MuttonChops · December 2025

Disclaimer: My Comments are based on reviewing thread pictures and (limited) Alde documents.
I'm not an expect . . . am hoping to add to a discussion so we can all become more
knowledgeable of the 3030 Plus.

I disagree with nüCamp advice to disconnect a fitting.
1st nüCamp and Alde engineering services define/review these OEM installations.
2nd A review of the system "elevations" supports the Yellow Relief Valve is located at the low point.
3rd When f1xedgear opened the fitting . . . no water was found

The 3030 Plus Plumbing should be something like this:

Image: https://us.v-cdn.net/5021717/uploads/editor/wd/3nhduh2g2aeo.jpg

It would be Super Helpful if @f1xedgear could provide some simple diagrams of how his 3030 Plus unit is connected to the trailer fresh water plumbing so the above estimate can be refined.

It would also be helpful to know how the Yellow Valve Input Side (the high loop) is connected to the trailer cold water and/or Nautilus panel.

Side Note: 3030 Plus have a NEW Control Panel Interface.
And it is dumbed down . . . i.e. more useless/confusing for troubleshooting.

Okpete · December 2025

I have a 2025 tab 400, built April and I have two yellow flappers ?

pthomas745 · December 2025

What exact Alde model do you have? Does it have the "Alde Flow" tank mentioned? One of the Yellow Flappers you have will be next to that extra tank.

Okpete · December 2025

I have a 2025 400 .two yellow valve. 1 located toward rear of enclosure,1 toward front . Both towards driver side wall

pthomas745 · December 2025

@Okpete This link will take you to a thread that discusses the Alde Flow....can you tell if you have this "Flow Tank"? In this thread the tank is the Red tank next to the Alde.

https://tab-rv.vanillacommunity.com/discussion/comment/217911/#Comment_217911

f1xedgear · January 12

Apologies for the delay responding.

pthomas asks: "What happened when you opened the Famous Yellow Flapper valve?" Not a lot. That’s what made me take a closer look at the plumbing. . . . "does the yellow valve connect to the blue (cold water) line, and the blue pipe coming "up" in your picture is the supply line for the Alde hot water tank?” Yes.

I attach several more pictures that I hope better explain the plumbing we have. The blue line below is the cold-water inlet path to the boiler.

Image: https://us.v-cdn.net/5021717/uploads/editor/7t/m63mjxdhrbce.jpeg

The low-point here—the yellow bit—shows basic location of the valve. Obviously, to my mind, that location won’t work to drain the tank. Could it possibly serve as a pressure release for burping?

Below is our 3030+: The green line is the cold-water inlet from the Nautilus.

Image: https://us.v-cdn.net/5021717/uploads/editor/qf/ru6dim4kptsx.jpeg

Image: https://us.v-cdn.net/5021717/uploads/editor/ln/pplffpjvtl3g.jpeg

I assume that my blowing out the lines also forced out the water in the tank. The test for that (as suggested to me by NuCamp) was disconnecting the line at the 3030+ cold-water inlet and finding no water coming out. Yeah, it was disturbing and disappointing to find that as NuCamp's remedy for draining the boiler tank.

MuttonChops · January 13

@f1xedgear interesting ( thanks for figures )

{{quick reaction to your recent post }}

IMHO nüCamp did not install the 3030 correctly.

Consider:
a) changing the Yellow Valve to 3030 hose routing to a flat elevation hose.
b) asking nüCamp do pay dealer to fix under warrantee
c) if (b) is rejected ask nüCamp Engineering Department to justify why the
routing in your trailer is correct/acceptable. No one should have to open/break
plumbing fitting to complete winterization as recommended by nüCamp Support

f1xedgear · January 13

MuttonChops, Thank you for your quick and very helpful assessment. I agree 100% with your opinion that nuCamp incorrectly plumbed the cold-water inlet. The picture that pthomas provided in his original post indicates to me that the (incorrect) install on my unit is not the only instance, so nuCamp is surely (one would think) aware of the issue by now. I will contact nuCamp with your considerations in mind and follow up to the Forum with any developments.

pthomas745 · January 13

The draining of the Alde tank in all the trailers could have been done with the cold water low point drain. Not all of it, but most of it. So, I'm wondering if the cold water low point drain is still working that way. The 3030 plumbing and water connections in the photos above show quite a bit of differences compared to the Alde 3010/3020.

The photos in the trailer show the Alde simply crammed into a very small space. I would take a close look at all the flexible hoses, etc, and look for crimped or bent hose connections. Would be nice to get some confirmation from someone about how the Alde yellow valve there is supposed to be the pressure relief/tank drain valve.

Okpete · January 21

I have 2025 tab 400 with Aldi 3030 plus with 2 yellow valves located on each side by boliler adjacent tire well. Very high physical effort to open two yellow flapper valves !

MuttonChops · January 21

Okpete said:
. . . 2025 tab 400 with Aldi 3030 plus with 2 yellow valves located on each side by boiler.
. . . high physical effort to open two yellow flapper valves !

Any chance of you providing a few pictures (different angles/views) of your Adle setup, they would be helpful as everyone tries to learn how the 3030 is being installed.

"physical effort" generally the Yellow Handle is very easy to flip up/open. Are yours jammed by other tubing or just very difficult to reach . . .

Okpete · January 22

I was referring to the additional effort for the second valve. They are easy to lift up

Okpete · January 22

MuttonChops · January 23

This has gotten interesting. Both @f1xedgear and @Okpete have 2025 TAB 400 builds with different Alde 3030 Plus Plumbing configurations.

I'm hoping that @Okpete's rig has a newer production date as his Two Yellow Valve set-up:
1) Better matches the Adle literature for installation
2) Allows full Hot Water Adle Tank Area water draining with the two valves

IMHO If @f1xedgear actually has a newer build date rig . . . then we really need nüCamp to explain how to fully winterize an Adle 3030 Plus when there is only one Yellow Valve and a possible high point water . . .won't drain issue.

For Reference my estimation (based on pictures) of the two Plumbing configurations.

Okpete · January 23

Build date for okpete 2025 was April

f1xedgear · January 23

Our 400 is an earlier build: July 2024, and a June 2025 purchase. So, it seems nuCamp eventually fixed this incorrect install but then didn’t/hasn’t notified owners (or dealers) of the fix for early production units. Seems to me that some sort of service bulletin issued by nuCamp is warranted. Thanks, Okpete and Mutton Chops, I have a little more info to go to nuCamp with a warranty request to correct their install error.

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Alde 3030 Plus does not have an Alde Flow tank, so there is only 1 Yellow Flapper Valve.

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