Three capacity classes cover nearly every Canadian washroom: the 6 L stall unit, the 8 L wall-mount, and the 20 L floor unit. Placement decides whether they work.
Key takeaways
- Three formats cover nearly every stall: slimline 12–15 L default, 20–23 L for high traffic, compact wall-mount for accessible stalls.
- Place beside the pan, reachable seated, away from the door swing, in every stall without exception.
- Standardise one format portfolio-wide; mixed fleets complicate liners and service for phantom savings.
- Full-unit exchange beats empty-in-place wherever hygiene is scrutinised.
The 6 L stall unit is the workhorse, slim enough to sit beside the fixture in a standard 900 mm stall without blocking the door swing. One per stall is the standard; a shared corner bin is the most common audit finding.
The 8 L wall-mount exists for one reason: floors. Healthcare and food-adjacent facilities need floors clear for machine cleaning, and a wall-hung unit at fixture height keeps the terminal clean honest.
The 20 L floor unit belongs where peaks are sharp, change rooms, schools, event venues. It trades footprint for capacity so the cycle between visits can stay the same as the office next door.
Placement rules of thumb: reachable from the seated position without standing; never behind the door swing; never where a knee hits it; and in change rooms, on the traffic path to the showers rather than tucked in a far corner. A bin nobody can reach politely is a bin that doesn't get used. And the contents go to the plumbing instead.
The three formats that cover almost every stall
- Slimline units (roughly 12–15 litres) — the default for standard office stalls. Narrow enough to sit beside the toilet without crowding knee space, tall enough that capacity outlasts a four-week cycle in most washrooms.
- Standard floor units (roughly 20–23 litres) — for high-traffic locations: transit hubs, gyms, schools. The extra capacity buys schedule headroom where traffic spikes.
- Wall-mounted or pedal-free compact units — for accessible stalls and tight retrofits, where floor space is regulated and every centimetre of transfer clearance matters.
One format decision beats bin-by-bin optimisation: standardise on slimline everywhere except the washrooms whose logged traffic proves they need standard capacity. Mixed fleets complicate liner stock and service handling for savings that rarely materialise.
Placement inside the stall
The unit belongs on the side of the toilet away from the door swing, reachable from seated position without standing or turning. In practice that means beside the pan with the opening facing the user. Not behind the pan, not in the corner the door sweeps through. In accessible stalls, placement must preserve the transfer space beside the toilet; a compact wall-mounted unit at reach height keeps the floor clear and beats removing the bin entirely, which some retrofits wrongly do to pass a clearance measurement.
Every stall, no exceptions — including single-occupancy rooms, accessible rooms and any all-gender washrooms. Coverage gaps concentrate exactly where a building's most vulnerable users are, and under the federal mandate a missing receptacle in any toilet room is a compliance gap.
A bin the user has to stand up to reach is a bin that gets bypassed. And everything it should have contained goes into the plumbing instead.
The hygiene detail that separates services
Two service models exist: empty-in-place, where a technician opens and empties the unit in the washroom, and full-unit exchange, where the bin is swapped for a sanitised one and the used unit leaves the building sealed. Exchange costs marginally more per visit and is worth it everywhere hygiene is scrutinised, healthcare, food-adjacent facilities, schools. Because the washroom never hosts an open unit, and the sanitising happens at a depot with proper equipment rather than beside the sink.
Retrofit realities
New construction places bins on a drawing; retrofits negotiate with rooms that already exist. Three recurring constraints and their standard answers: stalls too narrow for a floor unit beside the pan take a compact wall-mount on the partition, hinge-side, at seated reach. Heritage buildings with protected finishes take free-standing units. No drilling, with a slightly tighter service cycle because free-standing units run smaller capacities. And washrooms with floor-drain cleaning regimes (gyms, arenas, some schools) need units rated to be moved and re-placed daily without cracking the base. A durability spec worth asking about directly, because it separates commercial-grade from retail hardware faster than any brochure line.
The single most common retrofit mistake is solving the awkward stall by leaving it out. The stall that is hardest to equip, narrowest, oldest, furthest, is used by someone every day, and under a per-stall requirement it is the one an inspector finds. Every stall has a workable format; the constraint changes which one, never whether.
Frequently asked
Yes. A shared bin outside the stalls forces users to carry waste through the washroom, which most will not do. The plumbing takes it instead. Per-stall coverage is also what the federal mandate's covered-receptacle requirement expects, and it spreads volume so each unit fills two to three times slower.
Use a compact wall-mounted unit at seated reach height. It preserves the transfer space beside the toilet while keeping coverage, removing the bin entirely to pass a clearance measurement creates both a hygiene gap and a compliance gap.