youll love thbis one. I am in construction and porto san are a way of life well i was on a job were the loborers were chopping the street with the 90lb jacks those of you who dont know they run by a big tow behind air compressor with 1 1/4" hose connected to a ball valve. ok here goes one of the guys went into the porto san (they are all friends here) when he was taking care of business the other guys quietly slid the 1 1/4" air hose down the vent tube into the nice blue water. Then opened the ball valve full bore. you know what is next. covered head to toe.