When I got my 1982 Burro
13' it was also missing the water tank. I located a source for replacement (below), but after talking with several other camper's I decided not to order it. For one thing, I didn't want to add yet another 100 lbs. of weight
when traveling. Some had suggested to just fill the tank when you arrive. Other's suggested it's a pain to keep it "drinkable clean" after you begin using it the first time... That hit home with me!
After some serious thought I decided to buy a 3-gallon water jug from Walmart; it fits perfectly under the sink cabinet. Since I had just replaced the hand pump (eBay) I got some clear tubing and cut it to length from the pump to rest in a circle on the bottom in the jug. I use a piece of cloth to wrap around the tubing going into the jug to keep out dust and dirt. I fill the jug when I arrive, and empty it when I leave. I bring filtered-water to drink from home in a separate container.
Oh, and I really like having that extra storage space where a tank originally sat anchored to the floor in the driver's side basement.
Here's the information I found back then, if you decide to go that route:
Barker Fresh Water Tank, 12 gallons
Parts Number: 881021
Manufacturer Number: 11914
Your Price: $107.50
Non-toxic, food grade polyethylene water tanks are tasteless, odorless, and rust proof. All inlets are made of barbed hose so there are no threads to strip. Each tank includes parts necessary for a complete installation. 12 gal. 20"L x 12"H x 12"W. 1 per pack.
Barker – 12 Gal. Water Tank Kit
1125 Watkins Rd/PO Box 460
Battle Creek, MI 49016
Phone: (269) 965-2371
Fax: (269) 965-2389
Have fun - I suspect you'll love your Burro
as much as I do mine! - RJ