pump man works at a wastewater treatment plant, dealing with water purification.
you ever wanted to fuck a sewer? thought of getting nasty with some nasty toilet pipes? get out of that water, sport, 'cause this ain't no place for watersports.
i get that you might want to introduce some contaminants of your own to the water, but there's a much better answer to your rampant thirst, and that's a healthy and refreshing glass of water.