Three Way Valve Symbol

three way
Three Way is a 2004 film about a kidnapping plot, based on the pulp novel Wild To Possess by Gil Brewer, the film stars Dominic Purcell, Joy Bryant, Ali Larter, Al Israel, Dwight Yoakam and Gina Gershon. The film was released also with titles 3-way and Three Way Split.
Involving three directions, processes, or participants
tripartite: involving three parties or elements; "a tripartite treaty"; "a tripartite division"; "a three-way playoff"
A threesome is a form of group sex involving three people of any gender combination.

symbol
A mark or character used as a conventional representation of an object, function, or process, e.g., the letter or letters standing for a chemical element or a character in musical notation
A shape or sign used to represent something such as an organization, e.g., a red cross or a Star of David
an arbitrary sign (written or printed) that has acquired a conventional significance
The typographic character @, called the at sign or at symbol, is an abbreviation of the word at or the phrase at the rate of in accounting and commercial invoices (e.g. "7 widgets @ $2 = $14"). Its most common modern use is in e-mail addresses, where it stands for "located at".
something visible that by association or convention represents something else that is invisible; "the eagle is a symbol of the United States"
A thing that represents or stands for something else, esp. a material object representing something abstract

valve
A device for controlling the passage of fluid through a pipe or duct, esp. an automatic device allowing movement in one direction only
A cylindrical mechanism in a brass instrument that, when depressed or turned, admits air into different sections of tubing and so extends the range of available notes
control consisting of a mechanical device for controlling the flow of a fluid
device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone
a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it
A membranous fold in a hollow organ or tubular structure, such as a blood vessel or the digestive tract, that maintains the flow of the contents in one direction by closing in response to any pressure from reverse flow