Lectra/San can be connected to 2 heads...
However, the Lectra/San must be within 6' of any toilet that's connected to it, so that would rule out connecting a forward head and an aft head on a 45' boat to the same unit. (This, btw, is explained in the specs, which are on the Raritan website...I included the URL in my previous reply).As for a list of "no discharge" zones, none exists...it changes faster than any list could be printed. Some, however, are well-known--for instance, the entire state of RI...ALL non-navigable inland lakes... Martha's Vineyard, Nantucket, most (if not all) of Buzzards Bay. The Chesapeake Bay is NOT "no discharge"...nor is Long Island Sound or any of the ICW--although there are "no discharge" harbors and marinas on all of the above. There's a move afoot to make Barnegat Bay in NJ "no discharge"...and Key West...and the whole state of Maine. Although it's almost certain to happen in Key West, it's a toss-up whether it will happen in any of the others...a move to make all of MA "no discharge" was abandoned, even after the governer was quoted as saying "it's a slam dunk." I noted that you're in MO...check with the state agency responsible for enforcing the marine sanitation and other laws to find out what, if any, parts of the waters you sail on are "no discharge."