I work at a PC, AA9, but is there an option in your print dialog
Choose Paper Source by PDF Page Size?
assumes the documents are 11 x 17, 12 x 18
Optionally, you might create a 2nd (and 3rd) instance of your Epson printer and change it's default paper size to 11 x 17 (12 x 18) and name the printer Epson Tabloid (Epson Tabloid Extra). Choose the appropriate printer per the document.