My Husband is a Damage Controlmen (DC) on a ship in the Navy and has been for 3 years. He has to do a lot of dirty jobs, including uncloging tolets and drains(wherever they may be), hooking up the sewer lines to the piers when they pull into port,and yes,even crawling into the sewer tanks sometimes....Trust me its dirty. I even get to experince his job, with the smell that comes home with him from work.... Sincerly, Cristal Sheldon (smurfandwoody) San Diego, Ca.