Which Travel Trailer Large Grey Tank?
Which Travel Trailer Large Grey Tank? The grey water tank averages 10-30 gallons. Class C RVs, at 20-31 feet long, average a gray water tank of 28-40 gallons. 5th Wheel and Travel Trailers cover a wide range of sizes, and as a result, the gray water tank can be anywhere from 30-80 gallons. How long