bathtub
Enable an agent to recognise a bathtub, assess its suitability and condition for bathing, and determine what use, installation or maintenance actions its recorded constraints permit.
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.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an agent to recognise a bathtub, assess its suitability and condition for bathing, and determine what use, installation or maintenance actions its recorded constraints permit.
A bathtub is a watertight sanitary fixture sized to accommodate a person for bathing by partial or substantial immersion in water, ordinarily equipped with a drain and supplied with hot and cold water.
It can be Assess whether the basin geometry and documented limits suit a proposed bathing arrangement.; Determine whether filling, retaining water and draining are supported by the current condition of the fittings.; Evaluate entry and exit options against the user's needs and the installed surroundings.; Check proposed supports and service connections against documented installation requirements.; Select compatible cleaning or repair procedures from material and equipment documentation.; Identify defects or missing evidence that require inspection before a proposed use or modification..
Distinguishing features
The basin is intended to retain a body-bathing volume of water during use, unlike a shower tray intended primarily to collect and discharge flowing water.
Its occupant space is designed for a person's body to sit or recline in bathing water, rather than primarily for washing hands or objects as in a washbasin or utility sink.
Body immersion and bathing are defining uses; jets alone do not establish whether a vessel belongs here or under a recreational spa model.
A shower mounted above the basin adds a showering function without removing the basin's bathtub identity.
A watertight entry door, when present, changes access and filling constraints but does not make the vessel a different registered kind.
Scope
+ Basin geometry, bathing capacity and intended occupant arrangement
+ Shell materials, finishes and water-retaining condition
+ Support, mounting and connections to filling and drainage systems
+ Entry, exit and bathing controls supplied as part of the bathtub
+ Optional integral circulation, heating or air-jet equipment
+ Cleaning, inspection and repair constraints specific to the bathtub
- The bathing activity and personal care plans
- Whole-building plumbing, hot-water production and electrical distribution
- Bathroom layout, ventilation and room waterproofing beyond the bathtub interfaces
- Standalone showers, washbasins, swimming pools and recreational spas
- Separate bath lifts, grab rails and other assistive equipment
- Product-line commercial records and ownership histories of individual units
Characteristics
- Bathing configuration
- reclining; seated; other documented arrangement; intended occupant count Identifies how the basin accommodates bodies and prevents assumptions about posture or shared use.
- Installation configuration
- alcove; freestanding; drop-in; undermount; other documented configuration Determines support, enclosure and service-access interfaces.
- Basin geometry
- internal length, width, depth and entry height in mm, with measurement reference points Supports assessment of occupant fit, access and usable bathing space.
- Water capacity
- L, distinguishing empty-basin capacity from intended operating fill and stating the fill reference Occupant displacement and fill level affect water demand, freeboard and overflow risk.
- Shell and finish
- documented substrate, reinforcement and exposed finish Controls cleaning compatibility, damage interpretation and repair options.
- Installed load
- kg for dry mass, water mass and assumed occupant mass; support reactions in N where documented Makes the assumptions behind support suitability explicit.
- Water-service interfaces
- connections to filler, waste, stopper and overflow where fitted, with dimensions in mm Distinguishes integral components from connected services and establishes connection compatibility.
- Access provisions
- step-over rim; sealed entry door; integral seat; integral handholds; other documented provisions Supports assessment of entry and exit without treating any single feature as proof of accessibility.
- Functional condition
- separate observations for shell integrity, leakage, drainage, stability and fitted controls: verified functional; degraded; failed; unassessed Prevents one successful check from implying that the entire bathtub is fit for use.
- Powered bathing equipment
- none; linked pump, blower, heater or control assembly with documented supply and operating limits Separates a passive vessel from variants requiring additional operating and servicing constraints.
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 18 findings · 30 questions.
Bathing vessel identity Establishes the bathtub boundary and the body-bathing arrangement the vessel supports.
A bathtub must be distinguished from adjacent sanitary vessels and from the optional equipment attached to it.
Vessel boundary
Identifies the defining use and included components.
Retained-water body bathing
Record evidence that the basin is intended to retain water for bathing a person's body, and delimit combination installations.
- What documented intended use establishes this vessel as a bathtub? definition
- Which shower, spa or assistive components belong to neighbouring models rather than this bathtub? boundary
Occupant space
Describes the bathing posture and usable interior.
Body fit and displacement
Record internal contours, intended occupancy and capacity measurements with their fill assumptions.
- What internal dimensions, seat contours and backrest geometry define the usable bathing space? measurement
- What water capacity is documented, at which fill level, and does it allow for occupant displacement? measurement
Shell and installation Connects the water-retaining shell to its structural supports and installation interfaces.
The bathtub must retain water while transferring the combined vessel, water and occupant load through an appropriate support arrangement.
Shell construction
Captures the substrate, surface and structural condition of the basin.
Water-retaining envelope
Distinguish finish damage from defects affecting the basin's ability to retain water or carry loads.
- Which documentation identifies the shell material, reinforcement and surface finish? provenance
- What inspection evidence distinguishes cosmetic marks from cracks, corrosion, delamination or leakage? measurement
Mounting and load transfer
Defines support requirements and interfaces with floors, surrounds and enclosures.
Supported filled basin
Record required bearing points, fixing arrangements and installation loads without assuming the rim can carry weight.
- Where must the bathtub bear or be fixed, and what installation instructions establish those requirements? provenance
- What filled and occupied load must the supports accommodate, with which water and occupant assumptions? measurement
- Which joints to walls or surrounds require sealing, and which components require continued service access? boundary
Water retention and drainage Models the bathtub's filling, retained-water and discharge behaviour.
Bathing depends on a controlled transition between empty, filled and drained states through fittings whose presence and performance must be established.
Filling and fill limits
Records water delivery interfaces and the basis of permitted fill levels.
Controlled bath fill
Identify how water enters the basin and how users establish an appropriate level and temperature.
- Is the filler integral, rim-mounted or independently supplied, and which controls govern its flow and temperature? boundary
- What fill limit and water-temperature checks apply to the proposed bathing use, and where are they documented? action
Waste and overflow
Captures deliberate drainage and any overflow path.
Retention and discharge paths
Record the stopper, waste connection and any overflow separately; do not presume overflow protection is present or sufficient.
- Which fittings retain and discharge water, and is an overflow fitted and connected? definition
- What observed drain time, stopper leakage and overflow performance establish current function under stated test conditions? measurement
Entry and bathing controls Captures access constraints and optional equipment that changes bathing operation.
Rim crossing, door seals and powered features create distinct operating conditions that basin dimensions alone cannot describe.
Entry and exit
Describes movement across the bathtub boundary and support available within it.
Bather transfer path
Record step-over geometry, integral supports and any door-dependent filling or exit sequence.
- What entry height, opening width, seat height and integral handhold locations constrain transfer into and out of the basin? measurement
- For a door-equipped bathtub, what seal checks and fill or drain sequence are required before opening or closing the door? action
- Which user-specific access needs depend on external rails, lifts or bathroom clearance? boundary
Powered bathing functions
Handles optional jets, air systems and heaters as explicit variants.
Equipped bath operating envelope
Record powered assemblies, their operating limits and documented protective controls only when fitted.
- Which pumps, blowers or heaters are fitted, and what documentation establishes their supply requirements and minimum operating water level? provenance
- Which suction protections, interlocks and isolation procedures must be checked before operating or servicing the fitted equipment? action
Care and fitness for use Relates cleaning and defect evidence to decisions about continued bathtub use.
Surface compatibility, inaccessible water paths and defects at seals or supports require bathtub-specific maintenance and evidence.
Cleaning and water-path hygiene
Separates basin-surface care from cleaning internal circulation components.
Compatible bath cleaning
Record approved cleaning methods for the finish, seals and any internal jet circuits.
- Which cleaning agents, abrasives and temperatures are permitted for the documented finish and seals? action
- Where fitted, how must circulation pipes, jets and residual-water pockets be flushed, cleaned or drained? action
Defects and conformance evidence
Connects observed defects and applicable product requirements to use and repair decisions.
Evidence for continued use
Keep condition observations, repair criteria and product conformance evidence distinct, with unresolved checks visible.
- Which observed shell, support, seal, drainage or equipment defects require restricted use, repair or replacement under the relevant instructions? action
- Which standards, issuing bodies, editions and certification records apply to this bathtub variant in its intended jurisdiction? provenance
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- This describes the generic sanitary fixture, not a particular product model or installed unit.
- Dimensions and water volumes are approximate examples for conventional adult tubs, not universal limits or compliance requirements.
- Standard titles and scope are recalled; researchers should verify current editions, local adoption and applicability to the bathtub material and equipment.
- Which of these check these first hold for the sense of bathtub this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Alcove bathtub
- Freestanding bathtub
- Drop-in bathtub
- Recessed soaking bathtub
- Walk-in bathtub
- Whirlpool bathtub
- Which of these kinds and varieties hold for the sense of bathtub this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- EN 14516, issued by CEN, specifies functional requirements and test methods for baths for domestic purposes.
- ASME A112.19.1/CSA B45.2, issued jointly by ASME and CSA Group, covers enameled cast iron and enameled steel plumbing fixtures, including bathtubs.
- Which of these standards and regulation hold for the sense of bathtub this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Personal washing and soaking in homes and accommodation facilities.
- Bathing children with adult supervision.
- Assisted bathing using accessible designs and transfer equipment.
- Combined bathing and showering where a shower fitting and suitable enclosure are installed.
- Water massage in models fitted with powered circulation jets.
- Which of these real-world use hold for the sense of bathtub this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Overall length of a conventional adult bathtub - 1500-1800 - mm
- Overall width of a conventional adult bathtub - 700-850 - mm
- Water used for one bath - 80-200, depending on basin geometry, fill depth and occupant displacement - L
- Which of these typical measurements hold for the sense of bathtub this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Slips and falls during entry, exit or movement on wet surfaces.
- Drowning, particularly involving unsupervised children or people unable to lift themselves from the water.
- Scalding from excessively hot supply water.
- Leaks at drains, seals, fittings or cracks, causing concealed water damage.
- Microbial growth in inadequately cleaned whirlpool circulation systems.
- Which of these failure modes and hazards hold for the sense of bathtub this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- North American alcove installations commonly use nominal 60-inch-long tubs; many European products use nominal metric lengths such as 1700 mm.
- Japanese domestic bathing commonly separates washing outside the tub from soaking in a relatively deep tub.
- Plumbing, accessibility and electrical installation requirements vary by jurisdiction and by whether the bathtub includes powered equipment.
- Which of these regional variation hold for the sense of bathtub this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Shower - A shower washes the body with flowing spray; a bathtub retains a volume of water for immersion, although one installation can provide both.
- Hot tub - A hot tub generally maintains heated, treated water across multiple sessions and may accommodate several people; a conventional bathtub is filled and drained for each bath.
- Washbasin - A washbasin supports localized washing and is not ordinarily sized to accommodate an adult body for immersion.
- Whirlpool bathtub - A whirlpool bathtub is a subtype that adds powered water circulation and massage jets to the water-retaining bathing fixture.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of bathtub this model covers, and on what evidence? provenance
What the second pass must settle
- Does registry scope include portable infant baths and clinical bathing vessels, or should these link to narrower registered kinds?
- Which standards and certification schemes apply across ordinary, door-equipped and powered bathtubs in each intended jurisdiction?
- Which capacity and dimension measurement conventions permit reliable comparison between bathtub designs?
- What evidence supports slip-resistance and accessibility claims under wet bathing conditions for different finishes and access arrangements?
- Which material-specific defects are repairable, and what verification is required before returning repaired shells, seals or circulation systems to use?