Worcester's American Sanitary Plumbing Museum has decided to flush itself out of the city, but it's not going into the crapper just yet. The museum will relocate to the more appropriately named Watertown. Worcester might consider this development perfectly potty, but at least the collection is staying in Massachusetts. The owners of the museum, the Manoogs, are retiring and have donated everything to the Plumbing-Heating-Cooling Contractors of Greater Boston, the Worcester Telegram & Gazette reports.......