As boats become more complicated and include more complex systems such as water makers and generators it is increasingly easy to forget to switch on or off some vital system when joining the boat of leaving it for a period of time.
The best approach is to create a check list for your vessel. It should come in two versions.
One for closing the boat down at the end of a cruise and the other for ensuring that all the systems are started up correctly.
As each item is completed, it should be ticked off the list.
Although this may seem a laborious task, a few minutes effort will be worth the time and expense of forgetting to close the correct sea cocks if a pipe fails.
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