That word doesn't seem to exist. So Dan, therefore, must make up a word to serve his concept. If it floats it will become boat, as they say.

Not necessarily. He could just use a phrase, like "to supply water to" or the like. Not everything requires its own word. Believe you me, if a single verb ever becomes necessary, one will get coined, but it seems no great need exists for the nonce.
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Ceci n'est pas un seing.