Tragedy has struck

Checking the lemon laws is a good idea, but you'll need to check them in the state where the dealer is located.  You also may have a Uniform Commercial Code issue of "merchantability," i.e. a product not being fit for its intended use.  Again, this is why it's a good idea to check with a lawyer so that when you are working things out with the dealer, you are aware of your rights which makes it harder for the dealer to game you.

+1  Any chance you could return it to your dealer (they messed up big time) and they give you their "loaner" until yours is fully repaired.  I know the dealer we purchased ours from (U.P. Michigan) had a couple loaners they would allow their clients to use while warranty work was being done.

Well, I have contacted the dealer, and forest river. I'm looking at over a thousand dollars in just parts, no labor. If I have to, I will try to do it myself, but would rather have it done professionally. My main concern right now is saving the season. I can bypass the water heater, and boil or microwave some if needed but with leaks everywhere, it would be virtually impossible to camp in it. I want the toilet working.  I'm going to replace the pump, (leaking like crazy) the spray connector (same) and the shower valves (not as bad, but leaking) and then see if everything else holds water. Even if the dealer or forest river agree, I doubt they will be in any rush to get it done. Bearing in mind my dealer is a 13 hour ride away according to google. 

I agree with StephenH that you should give the dealer a chance to fix it, but in these days of so much cheating and dishonesty by so many businesses, it might be a good idea to find out what consumer protections may apply before you go to the dealer, so that when you talk to the people there you are armed with the knowledge of your rights.  If they sense that you are aware of your rights, you may find them much more receptive to taking responsibility.  In the old days, as I lawyer, I would have told my client to talk to the dealer first and try to work it out, but, sadly, times have changed as more and more businesses try to dodge responsibility for the stuff they sell.

Sorry to hear about your disaster with the damaged plumbing.  Massachusetts is probably a friendlier state insofar as consumer protections go, so you should have some leverage with the dealer, provided it is located in Massachusetts.  If you bought it out of state, then it gets more complicated.  This is a big enough problem you may want to have a chat with a lawyer.