Hey my brother in law lives in Wappingers Falls, Off RTE 9
They have some really decient plumbers there as I inspected some of the new construction for a local investor.
I was even called in to check the plumbing being preformed at Vasser hospital and the local guys really follow codes and do quality work.
I think you should seriously consider hiring a licensed and insured Master Plumber so you wont have to worry if the job was performed to local code.
Good luck and check out Cold springs along 9D as the fall season is approaching.
Fantastic color changes along the Hudson