And do you ever wish it was larger, or would you still pump it out frequently anyways, even if it was larger??

I currently have two 40 gallon waste tanks. They both need to be replaced, along with all the hoses (ching ching $$). I had a brainstorm today and was thinking about just using one tank and plumbing both heads into the same tank. If I do this I only have to buy one tank and I could even buy it a bit larger than the original, so I could go up to 50 or 55 if necessary. It would also eliminate one whole (LONG) section of waste hose (from the rear tank to the pump out). I'd only have to cut one extra hole though a bulkhead to connect the aft head to the fwd tank and that hose run would be about the same length as the original that went to the aft tank, so overall that length would be a 'wash' over stock.

Is 40 gallons too small for two heads? We don't use them much and have never filled them even when they were working.


EDIT: Here's a graphic of what I'm talking about. (Ignore that little kink in the pumpout line from the fwd tank)