Master plumber David Sierra still remembers the day about three years ago when he opened the cleanout on a 6-inch-diameter sewer line that was clogged solid with grease — really clogged, for about 1,000 feet.“There was grease overflowing out of the cleanout — that’s how full it was,” says Sierra, owner of El Plomero Latino (The Latin Plumber) in Orlando, Florida. “There was grease there like you wouldn’t believe. In fact, there was so much grease that we couldn’t even inspect the line before cleaning it. We had to go straight to jetting it.”But Sierra wasn’t worried, thanks to an investment
