MIL-PRF-45316 Trailer, Tank: Potable Water, 400-Gallon, 2-Wheel, M149A2This specification covers 1-1/2-ton, 2-wheel, 400-gallon \(gal\) \(1514 liters \(L\)\) capacity water trailer for transporting potable \(drinkable\) water \(see 6.1\).