Many words to shut off flow.

epsilonGreedy · April 9, 2019

I am trying to get my head around what distinguishes taps, values, stockcocks, ball valves, check valves and stop taps.

The hierarchy of the Plasson catalogue indicates:

All these things are either a valve or a tap.

A "stop tap" is a stopcock in valve form.

A "stop cock" is your traditional "stop cock" in tap form.

A check valve is a one way flow control device.

A ball valve is a common internal implementation of a valve.

Isolation valve shuts off flow to a single tap or device at the end of a plumbing branch.

I assume valves are intended to be either open or shut unlike a tap that can in addition be set at any intermediate state of openness?

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