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

Slackers

And looks "factory"!

BandB

@SLJ, we bought that same marine port after seeing your post. Did you use a hole saw (what size would work?) to make the opening or something else? What size screws did you use? (There's not much material for them to grab into.) Stainless steel screws? 
Did you use any type of caulking around the perimeter?
Has it held up well for you? Thank you for posting this picture!

bjn2

I removed the panel in behind the toilet in our 2023 320 s BD. The panel fought me quite a bit as it had stuck to the caulking. I had to use a hook puller tool to free the panel. The view of the Alde reservoir is poor with it mounted below the opening, so I decided to install a mirror on the trailer wall (flexible adhesive backed plastic) to better see the fluid level.
 

BandB

@bjn2, that's a great idea to mount a mirror in there, too. Thanks!

SLJ

BandB said:

@SLJ, we bought that same marine port after seeing your post. Did you use a hole saw (what size would work?) to make the opening or something else? What size screws did you use? (There's not much material for them to grab into.) Stainless steel screws? 
Did you use any type of caulking around the perimeter?
Has it held up well for you? Thank you for posting this picture!

I used a 6 1/4" hole saw and I think 1" #10 stainless screws/nuts, not wood screws. Measure your port before you buy a hole saw. It fits tight against the panel so sealant isn't really necessary.

Sharon_is_SAM

@bjn2 - now just mark the max and min lines with a permanent marker and you can easily tell when you need to add glycol.

BandB

@SLJ- Thank you for the additional information. That helped a lot! We got our hatch installed. My husband used a coping saw to cut the hole because we didn't want to buy a hole saw for that one job. We're very happy with how it turned out! I found flexible plastic mirrors at Joann Fabrics that had an adhesive backing, so we put that in there, too.