Alde glycol expansion tank locations for the TaB 320, Clamshell, and 400 models

Sharon_is_SAM

(A certain member suggested that we needed an easy to find thread that listed the locations of the expansion tank, so, TADA!)

The TaB Alde heating system debuted starting with the 2014 model year.  The glycol expansion tank locations vary by model.

Clamshell Models

The CS (no wet bath) model’s tank is located in a cabinet next to the floor A/C unit near the front of the trailer.  

The CSS model tank is easily located behind the hatch over the toilet.

320 Models

The early non-clamshell model tanks (2014 to early 2015 model years) are located under the driver’s side rear shelf.  Remove the square head screws to lift the shelf and expose the tank.

With the redesign of the rear shelf, beginning with the 2016 model year, the tank in the non-clamshell models is located at the end of the driver’s side rear shelf, behind the triangle-shaped, wood panel.  Again, remove the square headed screws and slide the panel towards the front of the trailer to uncover the tank.

New to the 2021 320 S and Clamshell models - the tank is behind a panel under the wet-bath sink. White caps cover the screws holding the panel in place.

The 400 Models

The 400 model tank is in the closet on 400s with the 2-way refrigerator.  On 400s with the 3-way refrigerator, it is inside the cubby area to the right of the driver’s side porthole window.  

2-way frig model (2018 - 2020 models)

3-way frig model for 2018 - 2020 models and ALL 2021 400 models

Bayliss

Thank you for posting this organized summary, @Sharon_is_SAM.  Good to have it all in one location for reference, regardless of the model [email protected] you own.

Sharon_is_SAM

I hope it will be a good reference for the inevitable question “Where’s my expansion tank😀”

Tundra57

A note about the tab 400 2019 boondock. Two of the screws are located next to the window frame. To remove these you need a right angle ratchet screwdriver no more than 3/4" high including bit and the correct square drive bit. I slotted the panel at those holes when returning the cover so the screws opposite the window frame don't need to be removed again and stay in place.

Verna

@Tundra57, the glycol reservoir location in the window is only for those 400’s with the larger fridge and no closet. 

The 2019 Boondock Lite with closet will have the glycol reservoir in the closet. 

Tundra57

@Verna. Did not know that, should have specified my exact model. Doesn't change how hard it is to get to. The Nucamp guys are very creative on where to put stuff. @Sharon_is_SAM nice thread. :-). Where the heck did you get all the pictures lol?

Sharon_is_SAM

@Tundra57 - the pictures are all from the forum.  I like that you can do a specific forum search and when the list of threads comes up, any pictures come up on the right side of the list.  You just need to be willing to scroll back a few years:)

marjamr

Just bought a 2021 [email protected] 320S. Cannot find the glycol expansion tank in any of the locations you referenced above. I have run out of places to look.

Sharon_is_SAM

OK, per nuCamp Customer Service, the 2021 320 and clamshell model Alde glycol expansion tank is located in the bathroom, on the wall under the sink, behind a white panel that is held on with screws hidden by white, plastic buttons.

ScottG

Sharon_is_SAM said:

OK, per nuCamp Customer Service, the 2021 320 and clamshell model Alde glycol expansion tank is located in the bathroom, on the wall under the sink, behind a white panel that is held on with 4 white, plastic buttons.

Seems like they have finally gone with a consistent location for both models.

marjamr

I found it. I will try and post a picture tomorrow.

ontheroad

@ScottG ...it definitely will make nuCamp's build easier to have the same locations.. it appears they are using the same front cabinetry for both models too..except 1 opening is used for a fridge..

jkjenn

ontheroad said:

@ScottG ...it definitely will make nuCamp's build easier to have the same locations.. it appears they are using the same front cabinetry for both models too..except 1 opening is used for a fridge..

Standardization will also simplify and make for less co fusion when helping new owners.

Denny16

On all the 2021 TaB400 models, the Glycol tank is in the front dinette location shown for the 3-way fridge option.  The glycol tank is no longer in the closet on this option model.
cheers

Sharon_is_SAM

Thank you @Denny16.  I edited the 400 model titles to reflect this change.

Denny16

No worries, thanks.
cheers

KJH

This is a beautiful page, I wish I had found it earlier. You should have seen the amount of time I searched for the one in my 2017 [email protected]! And it is hard to access. I am now in the PNW and it is very hard for me to find someone to do a flush and fill. It it beyond my skill set, and I do not have a flush pump. Still trying to figure it out. 

Sharon_is_SAM

Do a search on the forum.  There are owners who have completed the exchange without a hassle.  Good enough for the factory, good enough for me!

YanniLazarus

Hello all.  So, I had to laugh -- thanks to this thread I now know where the tank is in my new 2020 [email protected] 320, but "remove the square head screws" isn't that easy -- not exactly standard!  So... have ordered appropriate driver (I hope... it is a #0, right?).  I am having a hard time imagining that others check the glycol level very often -- and sure do understand why the tank was moved in 2021!  By the way, absolutely loving my [email protected] And I am being required to get a bit smarter every day!

Bayliss

@YanniLazarus, it is a #1 on my 2019 320S (I am not sure if nuCamp changed it on the 2020 model.)  It sounds like you already ordered a driver and/or bits, but I would recommend that you get something that has at least sizes 0, 1, 2 and 3.  I have used both the #1 and #2 on my trailer.

Sharon_is_SAM

We have gotten by with the #1 and #2 driver.

Denny16

there are a few finish screws that use a no.0 driver, but these are not normally removed.
cheers

KAR

Yes, this is super helpful. Our 2015 Little guy wasn't hard to find once we new to look in the farthest back corner on the drivers side under a board. Now, if they had only left a bit of a window to see the level it would really be easy but my husband was able to see it well enough! THANKS to all for your help. K

Verna

@KAR, I always found a headlamp came in handy when checking the glycol. If you can’t tell by the marks on the outside of the reservoir, the headlamp shining inside the reservoir definitely made it easier to see. 

PNWtabber

I have newly acquired a 2018 [email protected] 320S.  Found the expansion tank (thank you @Sharon_is_SAM) and added glycol as directed.  My problem is I am awful with screws, I don't know why, LOL.  I managed to get them out (yes, we have Robertson (square) bits), but had trouble lining up the existing holes when putting the cover back on the compartment. 

Has anyone found a way to modify that cover with some sort of clip or something, rather than the screws?  Seems if the cover needs to be removed frequently that there should be a more user friendly way to do it.

Ping

Thank you for this!  I was beginning to think they *missed* putting an expansion tank in our 2021 320S BD.  Before we open that panel to confirm it's there and it's full, do people use a flathead screwdriver to pop off those white screw caps? 

Editorializing:  IMO, they make this pretty hard to get at if we're supposed to check often. Also, our dealer should've done a better walk-thru, so we'd know about this and probably 20 other things. 

Verna

@Ping, I use the blade of my pocket knife to pop off the caps (keep track of them!), or a smaller flat blade screwdriver would work just fine. 

I have plans of inserting a cargo door in the plastic so I can have extra dry bathroom storage and so I can easily see what the level of the glycol is. I’ll post photos when completed. 

pthomas745

2023 400 Expansion tank location.  From a FB post today.

"Should be inside the front porthole- dinette area on the drivers side."

Sharon_is_SAM

@pthomas745 - is that the same as the 2021 and 2022 model?  I will update the above list if so.

pthomas745

Now I see the picture up higher in the thread! I should never post before coffee!  I'll delete my comment and picture later!