In as far as the costs for Watertown grease trap cleaning are concerned there are a number of factors that will determine the eventual cost of this procedure. First of all, you are better off hiring a professional to get your Watertown grease trap cleaning job done. You will need someone who has the experience and certification for this. Hiring a professional is all aimed at making sure that the cleaning process is done properly, and without any flaws. You will notice that if you get a professional for this, they will always cost you a bit more than an average plumber, and primarily because they leave nothing to chance.