turn-cock

No attention being paid to these manual applications, and the turn-cock having turned on the water, the engine turns off amidst the shouts of the boys; it pulls up once more at the work-house, and the beadle 'pulls up' the unfortunate householder next day, for the amount of his legal reward.

Sketches by Boz, illustrative of everyday life and every-day people Charles Dickens 1841

What is the use of the brass-stopper and turn-cock at the top of the receiver?

Conversations on Chemistry, V. 1-2 In Which the Elements of that Science Are Familiarly Explained and Illustrated by Experiments 1813

At length, in prosecution of this coarse and unhandsome jest, a sort of vessel with a turn-cock was constructed for holding wine, which was called a Shaftesbury, and used in the taverns of the royal party.

The works of John Dryden, $c now first collected in eighteen volumes. $p Volume 07 John Dryden 1665