Nalco Pretreatment Solutions (PTS)Â provides portable exchange deionization tanks to prevent scale buildup, extend battery life and improve battery performance. Applications include batteries for forklifts, golf carts, railcars and others. The portable exchange service provides water quality without installing water treatment equipment, handling chemicals on site or dealing with the costs of distilled water or disposable deionization cartridges. Expertly trained Nalco PTS field service technicians replace the portable tanks to ensure availability.