Lavatory sink
A bathroom sink. On plumbing drawings a washbasin is called a lavatory.
This explains what a symbol represents on a drawing. Conventions vary between firms and standards, and a drawing's own legend takes precedence.
How to read it
The Army's print-reading manual shows corner and wall lavatories among its plumbing fixture symbols. The Navy's Utilitiesman course lists bathroom lavatories separately from kitchen sinks among the fixtures shown by symbols, and describes lavatories as oblong, circular, square or oval, made of vitreous china, porcelain, steel or enameled cast iron.
Also searched as: basin, bathroom sink.
More blueprint symbols
Sources
- Construction Print Reading in the Field, TM 5-704 / AFM 85-27, Departments of the Army and the Air Force, para. 3-8d; fig. 3-8
- Utilitiesman Basic, NAVEDTRA 14265A, Naval Education and Training Command, U.S. Navy, ch. 1, sec. 1.3.2; ch. 6, sec. 10.1.1
- Reading Architects' Blueprints, William S. Lowndes, 1922, International Textbook Company, Scranton (Internet Archive), §6, art. 18
- Engineering Aid 3 (NAVEDTRA 14069), Nonresident training course, April 1995, Naval Education and Training Command (copy hosted by Navy Tribe), Ch. 8, fixture symbols
Last reviewed September 24, 2026 by Rory Hansen. How we research