Mar 21, 2006 · I want to switch to water cooling but, where can I get deionized water? At wal-mart lol? twite TechSpot Paladin. Mar 21, 2006 ... pick up some water wetter..witch lubricates the pump..peace ... Buy Great Value 24pk Spring Water from Walmart Canada. Shop for more Bottled Water available online at Walmart.ca Red Line Water Wetter® not only reduces cooling system temperatures, but when used with water as a coolant will help prevent corrosion. Water Wetter® passes the most severe test developed for automotive coolants when added to corrosive tap water and used in an automotive cooling system. Water Wetter and similar products may do the job better, but I've seen no different when the stuff is used in antifreeze. In warm winter and hot summer climates I'd use just water plus one of these products with corrosion inhibitors, surfactants, etc.