A wall-mounted toilet floats. The bowl is suspended from the wall, the floor is clear underneath and the tank is out of sight. A floor-mounted toilet is attached to a plumbing flange in the ground and drains vertically downwards.Most guides will make comparisons based on appearance, ease of cleaning and cost. Those are the obvious factors.This choice depends on the location of your drain, how your wall is constructed and if that wall faces outside. This guide discusses the parts that make the difference when you’re purchasing a fixture or beginning a renovation. Table Of Contents 1. What Sits Behind the Wall 2. The Waste Outlet Is the Real Project 3. What Your Wall Has to Be 4. Not on an Exterior Wall 5. The Weight Question, Answered With a Number 6. Height Gets Locked In Before the Wall Closes 7. Service Access and the Ontario Rule Behind It 8. Cleaning and Space, Measured Honestly 9. The Middle Option Most Guides Skip 10. Which One to Choose What Sits Behind the WallA wall-hung toilet needs three components; a floor-mounted one does not.The carrier frame is a welded steel frame bolted to the studs and to the floor. It supports the tank and both threaded rods where the bowl hangs, supporting the whole weight. The ceramic shoulders none of this load.The concealed tank is a thin cistern, hidden within the wall above the bowl. You access it via the flush plate and it supplies the bowl via a concealed elbow.The back-outlet drain is installed horizontally from the bowl to a stub in the wall and connects to your existing drain and vent. This is not necessary for a floor-mounted toilet. It is set on a wax ring atop a flange and drains downward.The Waste Outlet Is the Real ProjectA floor toilet sits on top of a flange in the floor. A wall-hung toilet drains through the back. If the existing drain is to be changed, then the vent must move as well.In a wood-frame floor with the branch line nearby, the repositioning remains fairly easy. But in a slab, it involves breaking out concrete. The vent location is often what kills most projects like this, and seldom comes up in a showroom discussion.The expensive part about wall-hung toilets is not the bowl; it is the drain relocation.A plumbing and drain inspection will locate both the branch line and the vent before any order is placed. That one visit decides whether the job is simple or will involve demolition of the wall.Need Professional Plumbing Help?Our licensed experts are standing by 24/7. Call (416) 383-7378What Your Wall Has to BeThe carrier systems have defined framing requirements and they are specific.Geberit’s 2×6 system requires a framing wall (or chase) of 5-1/2 inches and 19-3/4 inches of spacing between framing members. The members must support 880 pounds of weight without damage to the wall. There are shallower systems available for 2×4 construction, so a thin wall is not always a dead end.A typical interior 2×4 wall is normally furred out so that the carrier can be attached to the wall. Wall-mounted toilets may give you an additional 10 inches and a furred-out chase takes back a share of that. The gain is real. It is smaller than the photos suggest.Not on an Exterior WallThis eliminates many Toronto bathrooms, and doesn’t come up often in the showroom.Geberit states that its carrier is not intended for installation within exterior walls, or for water supply temperatures below freezing. There is a hidden tank that holds liters of water in a compartment mounted against the cold side of the building.The older houses in Toronto install their toilets beneath windows on the exterior wall. Powder rooms carved out of a corner do the same. For these bathrooms, a wall-hung toilet would require that the toilet be moved to an interior wall, or framed in with a furred chase in front of the exterior wall.We see enough frozen pipe repairs in the GTA in every January to make this a hard rule and not a manufacturer’s footnote.The Weight Question, Answered With a NumberIt’s the first thing that everyone asks, but the majority of guides would give reassurance in place of a numberThe standard ASME A112.19.2/CSA B45.1 states that the minimum static weight capacity of wall-hung fixtures must be 500 pounds. The Geberit carriers’ static load limit is 880 pounds, which is equal to 400 kg.This rating applies to the steel frame and the surrounding framing, but not the toilet bowl itself. The carrier must be securely attached to framing that can sustain the specified load. Inappropriate framing may make installation weak even if the load capability of the carrier is very high.Height Gets Locked In Before the Wall ClosesThe carrier lets the installer set the bowl rim anywhere from 15 to 19 inches off the finished floor. A floor-mounted toilet provides you with whatever the manufacturer has designed.The most compelling reason for wall-hung in a home planning for aging in place is flexibility. The trick is in the timing. The height is determined at the framing phase, prior to drywall and tile. If you change your mind later, you will have to open the wall. Service Access and the Ontario Rule Behind ItThe question about what would happen if the tank was leaking is reasonable, and the answer to this is contained within the Building Code.A fixture, valve or connection is considered accessible in Ontario if it can be reached by removing an access panel, door, or similar obstruction without cutting or breaking any materials. A hidden tank covered in tiles with no access will fail that test.In practice, the flush plate becomes the access panel. Removal of this will reveal the fill valve, flush valve and supply stop. Well-built systems are built around that, and the hidden tank does not have a flapper or chain that are susceptible to corrosion.Carrier parts are not as readily available as a regular tank kit, so it is important to know the model number and the manual. Our toilet repair and installation team is at your service for concealed systems throughout the GTA. Cleaning and Space, Measured HonestlyThe floor remains clear beneath the wall-hung toilet bowl. You can mop directly, and the dirt ring around the floor-mounted base disappears. This is the cleanest victory you can have on a day-to-day basis, and it is an honest one.Space is a smaller win than the marketing suggests. The tank moves into the wall, then the wall gets thicker to hold it. In a tight powder room, the extra space in front of the bowl matters.A floor-mounted toilet gives up the floor clearance and takes back everything else. It is cheaper, easier to service, no framing needed, and installation takes just a morning.The Middle Option Most Guides SkipThere is one other configuration that tends to be overlooked when comparing toilet models.A back-to-wall toilet sits on the floor with its cistern concealed in a shallow chase or a furniture panel behind it. The toilet will be placed on the floor, but the tank is tucked away in a chase or cabinet behind it. You have the flush plate along with the sleek look of the wall-mounted toilet. Many retain the floor outlet, so you won’t have to move your drain.It costs more than the regular floor-mounted toilet but significantly less than the carrier installation. For many GTA bathrooms, it can be the practical middle ground. Which One to ChooseConsider wall-hung if:You are remodeling the bathroom back to studsYou have space for building a 5-1/2 inch chase on an interior wallThe branch and vent lines are near enough to reroute without destroying the slabYou need a fixed bowl height for access, decided nowConsider floor-mounted if:The toilet is on an exterior wallYou are replacing a toilet but not remodeling the roomThe bathroom sits over a slab or a finished ceiling you prefer not to open upYou need easy servicing with immediate availability of replacement partsConsider back-to-wall if:You are looking for a concealed-cistern style without moving your drainYour budget is in between the twoFrequently Asked Questions1. Can I swap my floor toilet for a wall-hung one without opening the wall?No. The carrier and tank go inside the wall, and the waste outlet moves from the floor to the wall. The wall comes open either way.2. How much weight does a wall-hung toilet hold?The standard sets a 500 pound minimum for wall-mounted fixtures, and Geberit rates its carriers to 880 pounds. The framing behind it has to be up to the same job.3. What happens if the concealed tank fails?You reach the valves and the supply stop through the flush plate. Nothing needs cutting, which is what the Ontario Building Code requires of concealed fixtures and valves.4. Do wall-hung toilets flush as well?Flush performance belongs to the bowl and tank pairing, not to the mounting. Check the MaP score for the exact bowl and carrier combination you are quoted.5. Are wall-hung toilets allowed on an exterior wall?Manufacturers advise against it, and Toronto winters back them up. Move the fixture to an interior wall or frame a chase in front of the outside one.6. Which is cheaper to own over ten years?Floor-mounted, on both counts. Lower purchase price, cheaper install, and repair parts you can pick up locally.
