2025 Mack MD74 Water Truck – Work-Ready Powerhouse Turn the key and put it straight to work. Outfitted with a 2,500-gallon water tank and precision spray nozzles, this Mack MD74 is built for dust control, compaction, and cleanup with unbeatable efficiency. Fill it your way—draft directly from a water source or pressure-fill from a hydrant—and get the job done without compromise. Built on Mack’s legendary platform for unstoppable reliability, it’s rigged, tested, and ready to start earning from day one.