toilet
Let an agent treat a toilet as a fixture with a disposal system, water use, accessibility and hygiene standards, and as a place with privacy and access rules.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent treat a toilet as a fixture with a disposal system, water use, accessibility and hygiene standards, and as a place with privacy and access rules.
A sanitary fixture, or the room containing it, used to collect and dispose of human urine and faeces, by flushing to a sewer or septic system or by a dry or chemical process.
What it is for: Disposing of human waste hygienically, protecting health and dignity.
It can be use it, which depends on access, privacy and accessibility; install and connect it, to a sewer, a septic tank or a dry system; clean and maintain it, under hygiene rules in public settings; locate one, which matters for public toilets and accessibility.
Distinguishing features
Collects and disposes of human waste, unlike a basin or a sink
Needs a disposal route: sewer, septic, dry or chemical
Public toilets carry access, accessibility and hygiene rules
The word covers both the fixture and the room
What it looks like
Usually a ceramic bowl with a seat and a cistern or flush valve; squat toilets are a pan set in the floor; dry and portable toilets use enclosed containers.
Physical character
flush volume: 3-9 litres - dual-flush and low-flow designs use less
seat height: 380-480 mm - accessible toilets are at the higher end
outlet diameter: 90-110 mm - connection to the soil pipe
How it is recognised
A bowl or pan with a trap or drop, and a flush mechanism or a dry chamber
Signage such as WC, restroom or pictograms for public toilets
Accessible toilets have grab rails, space for a wheelchair and alarm cords
Related models
is a kind of - inherits plumbing and hygiene questions
connects to - the disposal system decides where it can be used
is part of - the room is a separate model
is regulated by - installation, ventilation and accessibility rules
In practice
Families and kinds
by position: sitting, squatting
by disposal: flush to sewer, septic, composting, chemical, pit latrine
by setting: domestic, public, portable, on vehicles
by design: wall-hung, close-coupled, urinal as a related fixture
Standards and regulation
EN 997 and EN 33 for WC pans in Europe
ASME A112.19.2 and flush volume limits in North America
Accessibility standards such as ISO 21542 and national building codes
WHO guidelines on sanitation and health
Failure modes and hazards
Blockages and overflows, which spread contamination
Leaks that waste water continuously
Lack of accessible or safe toilets, which excludes people
Poor ventilation and cleaning, which spread infection
Also called
+18
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.toilet
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Fixture and disposal The appliance and where the waste goes.
The disposal system decides installation, use and environmental impact.
Fixture type
Design and position.
Fixture description
The type, design and dimensions.
- What type of toilet is this, and what are its main dimensions? definition
- Which standard does it conform to? provenance
Disposal route
Sewer, septic or dry.
Disposal system
Where the waste goes and how.
- Where does waste from this toilet go? definition
- What happens if that system fails? boundary
Water and maintenance Consumption and upkeep.
Water use and maintenance are the largest ongoing costs and environmental impacts.
Water use
Flush volume and leaks.
Water consumption
Flush volume and measured use.
- How much water does each flush use? measurement
- Is it leaking, and how would that be detected? measurement
Maintenance
Cleaning and repair.
Maintenance record
The cleaning and repair schedule.
- How often is this toilet cleaned and inspected? measurement
- Who is responsible for repairs? provenance
Access and accessibility Who can use it.
For public toilets, the question people ask is whether they can get in and use it.
Access
Opening hours, fees and location.
Access conditions
Where it is and when and how it can be used.
- Where is this toilet, and when is it open? definition
- Is there a fee or a key required? definition
Accessibility
Provision for disabled people and families.
Accessibility features
The features present.
- Is it accessible to wheelchair users, and to which standard? measurement
- Are baby-changing and adult changing facilities available? definition
Hygiene and health Keeping it safe.
Sanitation is a public health measure; failures spread disease.
Hygiene
Cleaning standards and handwashing.
Hygiene provision
Handwashing and cleaning provision.
- Is handwashing provided next to it? definition
- Which hygiene standard applies in this setting? provenance
Safety and privacy
Personal safety and dignity.
Safety measures
Locks, lighting and alarms.
- Does it provide lockable privacy and an alarm where required? definition
- What should happen when an alarm is triggered? action
What the second pass must settle
- Should the fixture and the room be separate entries?
- How should accessibility of public toilets be represented so agents can answer "is there one I can use"?
- How should non-sewered sanitation be modelled for places without sewers?