MOVING CLOTHES WASHER TO SECOND FLOOR WITH A DRAIN PAN. WHAT IS NY CODE?CAN'T FIND ANYTHING ON IT. SHOULD I PLUMB IT LIKE AN ATTIC AC COIL OVERFLOW OUTSIDE OR IS IT PERMISSABLE TO TIE INTO (NEW) WASHER DRAIN, IF SO HOW SHOULD IT BE TIED IN? BEFORE OR AFTER TRAP,ETC.? THANKS FOR ANY INPUT.