AQUAMATE: The original portable water delivery system. Complete Aquamate units, parts, and accessories. Our five models provide the perfect size of watering system for every application. Aquamate Models and their water capacities: AQM2 - 9 gallons. AQM3 - 12 gallons. AQM4 - 20 gallons, AQM5 - 28 gallons. AQM6 - 40 gallons.