Definition of seacock in US English:



  • A valve in an opening through a ship's hull below or near the waterline (especially one connecting a ship's engine-cooling system to the sea).

    • ‘Internal loops in the water passages typically prevent complete drainage, so disconnect the raw-water connection from the closed seacock and submerge it in a 50-50 antifreeze mix.’
    • ‘Out of the water an open seacock still admits moisture, frigid air, and perhaps vermin, so close them.’
    • ‘After the seacock or gate valve is closed, remove the hose temporarily so that it drains and then use an absorbent cloth or turkey baster to eliminate any residual water in the nipple.’
    • ‘Since the seacock was left open, water poured in and sank the boat.’
    • ‘Consider removing the hose from the lowest seacock and leaving it open.’