Plumbing valves

valve that allows fluid to flow through it in only one direction

fitting in piping

quarter-turn valve which uses a hollow, perforated and pivoting ball to control fluid flow

flow control device

valve that automatically regulates the pressure of fluid traversing it

device that regulates, directs or controls the flow of a fluid or a gas

fixed-geometry passive check valve allowing a fluid to flow preferentially in one direction, without moving parts

Automatic value for steam equipment

plumbing valve used to automatically release trapped air from a heating system

A ballcock (also balltap or float valve) is a mechanism or machine for filling water tanks, such as those found in flush toilets, while avoiding overflow and (in the event of low water pressure) backflow. The modern ballcock was invented by José Antonio de Alzate y Ramírez, a Mexican priest and scientist, who described the device in 1790 in the Gaceta de Literatura Méxicana. The ballcock device was patented in 1797 for use in steam engines by Edmund Cartwright.

valve fitted in the bottom of a ship's plating

flow control device

thumb|right|Example of symbol for a stop valve A stopcock is a form of valve used to control the flow of a liquid or gas. The term is not precise and is applied to many different types of valve. The only consistent attribute is that the valve is designed to completely stop the flow when closed fully.

valve with a small port and a threaded, needle-shaped plunger

gas venting method for a hydraulic systems