A dock hose is unlimited pressurized water, one failed fitting away from the inside of your boat. This is the setup that closes it for you.
With a LinkTap valve on a paid plan, a flood alarm closes the valve automatically — locally over your network when you’re aboard, from the cloud when you’re not. And the valve only ever opens with a volume or time limit, so even if everything else failed, it physically can’t run forever.
Flow metering is the quiet half: see how many gallons are actually moving through your plumbing, and set a ceiling so a runaway line shuts itself off before it becomes a bilge alarm.
Who’s plumbed in? Post your valve placement and what you set the limits to — the water control docs cover how the shutoff behaves, but real installs are what this category is for.