Where is the Alde Expansion Tank?

mntrails

Sharon_is_SAM,  I was referring to the panel in the picture below that has the large oval cut out of it.  Notice the crack along the far left side edge, there's one on the right to.  The access panel screws into place and leaves a similar crack.  Now if water goes past the crack in the access panel, it will head right for the crack in the panel that you see below and water will sit on the plys of the plywood.  But if the crack you see below is caulked, the water drains down to the toilet that has a seal that will let the water come out onto the toilet and be wiped up.  So when I looked at it, I figured the thing to do was caulk the sides of the inside panel you see below.  Granted, unless you use the shower a lot, and actively spray all around, its probably not a big problem but I was just being thorough.  It would be interesting to know if NuCamp's manufacturing process actually has them caulk things this way.  When I studied the shower stall, I noted that they did take the time to caulk everything else which tells me they are interested in stopping water exposure to the edges of the wall material. 

Sharon_is_SAM

Now I see.  The surround should be sealed/caulked and the panel should float.  I will pass this on.  

Bayliss

@mntrails and @BywaysNW, would it make sense to put some very thin weather-stripping (maybe a really thin rubber seal) along the inside edges of the removable panel to prevent water intrusion through the panel edges, or is that not necessary?  I'm thinking the top edge of the panel may not be an issue (since it appears to be flush up under the edge of the sink), but weather-stripping would be a way around caulking that panel along the right and left side edges (although the area of the sink cabinet that butts up against the wall does need to be caulked, regardless of how you deal with the removable panel.)  The bottom edge of the removable panel might not be an issue since water would presumably drain off onto the top of the toilet, as already noted.

mntrails

@Bayliss, weather stripping might work but I have to say that NuCamp has that panel cut to fit pretty snuggly (which is good).  Also, its a hard plastic panel so there's no issue of water on the edges like there is with the interior plywood panel.  As far as the top edge goes, the sink has an overhang and the bottom edge actually extends down another 3/16 of an inch or so like a drip edge. Honestly, I think they have it figured out pretty well.  I had a tube of Kwik Seal out for a different purpose and it took just a couple minutes to run a bead down each edge of that interior panel.  The longest part was letting it dry :-).

Bayliss

Sounds good, @mntrails.  Thanks!

Hillbilly

Can any one explain where to find the mixing valve on a 2021 Tab 400 BDL

pthomas745

Have you found your Alde?  Here are some thread photos to show what the mixing valve looks like.

https://www.google.com/search?q=400+mixing+valve+site:tab-rv.vanillacommunity.com&client=firefox-b-1-d&sxsrf=ALeKk01PmfD7Q1cVLEbc-VCLg4wP3KGJfA:1599534037400&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjXsOvQyNjrAhXRPn0KHSz7DisQ_AUoAnoECAwQBA&biw=1920&bih=1098#imgrc=WF-JpeyrrBWQRM

rhyno

Hillbilly said:

Can any one explain where to find the mixing valve on a 2021 Tab 400 BDL

The Alde mixing valve for the 2021 is pictured in this thread.  You'll need to unscrew the access cover under the bed to get to it. 
https://tab-rv.vanillacommunity.com/discussion/10594/2021-400-bdl-has-arrived/p1

Sharon_is_SAM

It is under the bed on the driver’s side next to the wardrobe.

William_Keever

Does anyone know how often the expansion tank needs to be checked?  Also, what are the signs it needs to be checked?

AirBoss

I check it daily when in use (400 tanknis easy to check). Quick glance to ensure it's at proper level. If it drops below minimums or is discolored it's likely time for maintenance.