Marx O gauge Water Tower with box (bubbler?)

Up for auction is one Marx brand O gauge Water Tower. Unit in nice visual shape. Read online that this unit is supposed to bubble the water in the column?? Water actually in column right now. Seems to be well sealed.
No warranty. I have no way to test it.
Not sure how to empty the water out of it.
Email my if you know, please!
Otherwise, box in poor shape, but a good identifier.
Will be properly packed to make the trip. I use new shipping materials and packing. No shoebox shipping here!
Thanks for looking, and check my other auctions for interesting Lionel and communications items!
Tower stands some 14 inches or so tall, and nearly 5 inches across the base.
I will have to reinforce the box to ship this without damage. This will of course, get a new shipping box, and I will reinforce all four sides with
more cardboard to keep anything from breaking.
Thanks for understanding. Shipping/handling will be a little higher due to extra steps to insure a safe delivery.