Answer: GALLONS

AnswerCrossword Clue
GALLONSGas-tank stat
GALLONSMilk measures
GALLONSWater units
GALLONSLiquid measures.
GALLONSHat sizes
gallonsunit of capacity equal to 4 quarts (3.7853 liters)
gallonsGALLON, a unit of liquid measure