I am concedrned about the tank sweating inside the wall and getting mold in there and not being able to see it or a leak.How does that work?

Hi Douglas: I gutted a small, 1300 square foot bungalow house in Georgia that I own across the street from Dobbins ARB/Lockheed, and I am installing a total of three of these Geberits concealed toilet tanks. First of all, the concealed tank part of the wall-hanging toilet is sturdy, extremely well built, the water holding tank is a thick, molded, polyethulene tank, not glass or ceramin, it is tall & relatively thin, and it is further insullated outside of the tank with polystyrene. It does not look like it would be condusive to buolding up sweat, tho I suppose if you lived in a part of country where water supply very, very cold, and you have warm, humid ambient air leaking into the sealed wall where concealed tank installed (possibly from around floor holes where cold water line comes into the tank, or where 3" PVC sewer/drainage line exits. The depth of the tank unit makes it too big to fit concealed inside of 2x4 framed walls, but would in 2x6 framed walls. All of my units are or will be installed well withing the interior/inner walls in the house, not anywhere along and of the exterior/perimeter walls, hence, no substantial temp/himidity differencial. I built out framing from the 2x4 walls just around the concealed tank, so somethging like a rectangular, approximately 24"x44" box is structurally soundly & securely mounted to wall & floor to easily support the weigh of even the most robust person (extire weight of person has to be supported from wall-attach toilet, it does not touch the floor, as you know). That extended from the 2x4 wall would seem to be required in most applications, I'm guessing, because of location load bearing walls AND their structural support framing below, since both water & sewer lines enter the concealed Geberit in a small area of its approx 4x18" footprint which cannot enter or leave through support beams. Moreover, because I am using 3/8" tile in each application, the concealed tank frameout I covered with 1/2" sheathing, using quality deck screws sold at Home Depot, covered by 1/2" concrete Backer Board cemented to the sheathing with PL Premium either 3X, or 8x Polyurethane construction adhesive, and backer board screws, onto which I installed tile with gray 32 thinset. I am so impressed with Geberit's quality & materialk of construction, added to the care I took to conceal in a way that would make it so extremely unlikely that a hot/humid temp differential would affect the concealed tank compartment. I did use pink fiberglass in the 2x4 wall that my 2x6 Geberit concealment wall was built ouyt from, mostly so toilet noise from bathrooms would never be hear in any adjoining rooms, not because I had temp. insullating concerns; there is no addition room to ack any insullation in the concealed tank compartment, it's snug like what you'd imagine on a Space Shuttle. My best recommendation is to put your worries to rest as to condensation in walls that in turn wmight develop black mold. I know my answer is a bit long, & I hope it helped & that you were able to easily follow what I was trying to pass on to you. I LOVE my units, mostly because I wnted to go wholely away from floor mount toilets that are almost always installed in tight/cornered locations & the "crud" that inevitably builds up aound its base over the years (unless you have great cleaning staff). rob quill

How do you change the flapper valve which you know will eventually wear out? Do you have to cut the wall open?

All of the components are in a cartridge that can be changed through the wallplate. So you don't have to cut the wall open.

Any differences between the 2x4 and 2x6 versions of this carrier, apart from the obvious size and price?

The 2" x 4" model is engineered to fit into the tighter wall cavity and is more costly, and and most difficult to manufacturer. So this creates the price difference. http://www.amazon.com/Geberit-111-798-00-1-Concealed-Carrier-Dual-Flush/dp/B01C7FL4PK?ie=UTF8&keywords=Geberit%20111.798.00.1&m=AOXSRG6WMYPTS&qid=1463695496&ref_=sr_1_1&s=merchant-items&sr=1-1

What model toilet would this carrier fit? can i buy any wall mounted toilet and it should be fine?

Hi there. I have 4 of these concealed carriers in my house. two of those have a Toto Toilet CT418F that cost me $ 167 dollars and I have used also the Kohler model 6299. All of them work fine with no problems. My only issue is that in non of them holds as much water as the conventional ones. But the "clean" all around, specially in the floor, is definitely the best plus anyone can have.

Color	White
Product Dimensions	5.5"D x 19.75"W x 49"H
Material	Plastic
Brand	Duravit
Item Weight	8 Pounds
Installation Type	Wall Mounted
Shape	Rectangular
Seat Material Type	Wood
Manufacturer	Duravit
UPC	020535449976
Global Trade Identification Number	00020535449976
Part Number	111335005
Item Weight	8 pounds
Item model number	111335005
Is Discontinued By Manufacturer	No
Size	Large
Finish	No Finish
Item Package Quantity	1
Water Consumption	1.6 Gallons per Flush
Flush Type	Dual Flush Toilets
Special Features	153623153623
Usage	Inside
Included Components	Carrier, Tank
Batteries Included?	No
Batteries Required?	No
Warranty Description	5 Year Limited Warranty

Geberit 111.335.00.5 DuoFix In-Wall System with Sigma Concealed Tank for 2x6 Wall Construction, white, large

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