Specification Database
Home – Specification Database
A comparison workspace for published bathroom fixture dimensions and fit notes.
| Type | Model / Reference | Length / Width | Width / Spacing | Height | Fit Note |
|---|---|---|---|---|---|
| Toilet | Kohler Highline Arc K-26812 | 28-11/16 in | 17-11/16 in | 28-3/16 in | 12 in rough-in |
| Toilet | Kohler Santa Rosa K-3803 | 27-1/2 in | 18-3/4 in | 27 in | 12 in rough-in |
| Faucet | Centerset bathroom faucet | Model-specific | 4 in centers | Model-specific | 3-hole pattern |
| Faucet | Widespread bathroom faucet | Model-specific | 8–16 in centers | Model-specific | 3 independent pieces |
| Vanity | Common compact vanity | 18–24 in | 16–22 in | 30–36 in | Confirm drain/drawer fit |
| Vanity | Common double vanity | 60–72 in | 20–24 in | 30–36 in | Confirm two drain centers |
| Bathtub | Common alcove bathtub | 60 in | 30–32 in | 14–20 in | Measure flange and drain |
| Shower Door | Sliding door opening | Model-specific | Measure top/middle/bottom | Model-specific | Use smallest width |
Database entries are reference snapshots. Product specifications can change; use the current manufacturer PDF or technical drawing as the purchasing authority.
Measure the Real Specification Database
Record model number, document revision and overall dimensions from the finished reference surfaces that control this page.
Start with the decision
The purpose of this model specification research review is to compare published dimensions without losing the source, model configuration or revision context. Begin by writing down what must remain unchanged in the room, which parts of the project can still move, and who will approve the final installation. A measurement is useful only when its reference surface and direction are clear.
Build a complete dimension map
Treat model specification research as a three-dimensional envelope, not a single catalog number. Record model number, document revision, overall dimensions, mounting dimensions, installation clearance and source date on one field sheet. Label every value with its start point, end point and unit, and identify whether it was measured from a finished wall, floor, deck, opening or product centerline. Add a small plan sketch and an elevation so horizontal and vertical measurements cannot be confused.
Use a repeatable field sequence
Measure in the same order every time. First confirm that construction around the model specification research is complete enough to expose the true reference surfaces. Second, photograph the area without the tape in place. Third, capture model number and document revision, then verify them with a second pass from the opposite direction when possible. Continue with overall dimensions, mounting dimensions and the remaining clearances. Finally, place the notes beside the photograph and date the record.
Record the surrounding envelope
A product can match its headline dimension and still fail because the room around it was not documented. Map retailer package dimensions, regional variant, discontinued revision, optional component, unit conversion and missing drawing view. Note which items are fixed, which can be relocated and which move during normal use. Draw door, drawer, handle and panel arcs at their maximum travel.
Test Model Specification Research in the Room
Check the measured envelope against retailer package dimensions, regional variant and every moving or service condition nearby.
Scenario: Early category research
For a early category research, preserve the existing room facts before comparing new products. Photograph the current arrangement, record all six key measurements and identify any finish that will be added or removed. Then compare at least two candidate drawings on the same scale. The question is not merely whether the product can be positioned; it is whether retailer package dimensions, regional variant and discontinued revision remain usable after installation.
Scenario: Shortlist comparison
A shortlist comparison often creates more design freedom, but it also introduces more opportunities for assumptions. Freeze the finished reference surfaces, then coordinate model number, mounting dimensions and source date with plumbing, electrical work, backing and finish thickness. Review the candidate product before openings or supports become expensive to move. If the supplier drawing changes, mark the revision date on the field sheet and repeat the affected comparison.
Scenario: Replacement-part match
For a replacement-part match, separate user needs from product labels. Translate the requirement into physical checks such as document revision, installation clearance, operating reach and uninterrupted approach space. Then test the complete room arrangement, including optional component and unit conversion. A label such as compact, comfort, accessible, universal or professional does not replace a dimensioned plan. Where accessibility or code compliance matters, use the applicable adopted requirements and qualified project review.
Scenario: Pre-purchase verification
A pre-purchase verification should begin with a difference list. Identify which measurements, connections, supports and service points can change compared with the existing condition. Check overall dimensions and source date even when the new item appears to share the old product's nominal size. Small geometry changes can move an edge, handle, outlet or connection into conflict with regional variant or missing drawing view. Keep removal and delivery access in the plan as well.
Verify the Exact Product
Match the field record to the current official product page and technical specification PDF before the purchase or installation decision.
Separate nominal and actual size
Nominal names are useful for browsing, but model specification research depends on actual model geometry. Retail pages may mix package dimensions, family-level ranges and rounded values. Use the dimensioned views in official product page and check their reference points against the field sheet. When two sources disagree, confirm the complete model number, configuration and revision before choosing a value. Do not average conflicting specifications.
Read the source set as a package
No single document answers every model specification research question. Use official product page for overall geometry, technical specification PDF for sequence and required clearances, installation manual for component compatibility, and dated archive note for project conditions outside the product itself. Save local copies or stable links with the model number and review date. If an optional part changes document revision, mounting dimensions or service access, treat that part as a different configuration.
Plan for finish and construction changes
Finish thickness can move the reference surface after rough work is complete. Tile, panels, backer, furring, trim, flooring and sealant may change model number or the usable space around retailer package dimensions. Record whether every measurement is rough, prepared or fully finished. If work is unfinished, calculate the expected build-up separately and label it as an estimate. Do not silently combine a rough dimension with a finished product clearance.
Editorial Responsibility & Source Standard
Who prepared this guidance, how it is reviewed, and how readers can challenge or correct it.
BathSpecs Editorial Team
The team organizes manufacturer dimensions into finished-surface measurement steps and flags the conditions that still require installer, designer or code review.
Last reviewed: August 14, 2026
Material specification changes, authoritative guidance updates and well-supported reader corrections trigger another review.
Exact model documents control the purchase
For model specification research, BathSpecs prioritizes the current manufacturer specification and installation instructions, then applicable official requirements and documented finished-site measurements. Retailer summaries are treated as discovery aids, not final dimensional authority.