'92 Breakaway. The spec sheets say 40 gallon, but when I measure it I only come up with about 34 gallons. (231 cubic inches per gallon) Am I missing something. Add the hot water heater and it comes out about right. Anyone else know about this.

Having been a salesman for 30 years, (but a very honest one) they probably rounded up on the specs.. But the hot water heater sounds right.