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

pthomas745

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.

MOS2

So is this good or otherwise ?

pthomas745

@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

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

Adle 3030 Video

Binghi

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

f1xedgear

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+.

pthomas745

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

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:


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.