How to use "cocks" in a sentence

I opened the sea cocks and the sea water flowed in

The sea-cocks had been turned full on.'

'The sea-cocks? What are they?' asked the Coroner.

'The sea-cocks close the pipes leading to the wash-basins, sir

'With those holes, sir, and the sea-cocks open, a small boat like Mrs de Winter's would soon sink

'Then whoever took the boat out that night also made those holes and opened the sea-cocks.'

'Rebecca never opened those sea-cocks