Re: Holding Tank Discharge Lock


There is no general requirement in US waters to lock the overboard discharge valve!

Some local jurisdictions or marinas might have such a rule, but it is most certainly not required in all US territorial waters.

That said, it is not legal to discharge your tank within 3 nautical miles of the coast, but you do not have to disable the discharge valve.

I have kept a boat in a marina which wanted the valve disabled.  Tying it shut with a plastic cable tie satisfied them.

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