Originally Posted by MastUndSchotbruch
As it happens, a few weeks ago I had the kitchen sink metal (connector under the sink) literally crumble in my hands when I was working on something down there. I could have failed literally any time and easily sunk the boat had the seacock been open.
A friend almost lost his boat years ago with a similar issue. Sink hose slipped off the sink connector, fell down, and water started running in. Luckily he noticed the boat was low in the water before it sank.