How Big Is The Gray Water Tank Of A Camper?
How Big Is The Gray Water Tank Of A Camper? Class A RVs are 21-45 feet long, with a grey water tank averaging 65-85 gallons. Class B RVs are much smaller, at 17-19 feet long. The grey water tank averages 10-30 gallons. Class C RVs, at 20-31 feet long, average a gray water tank of