Summary: The product itself works great. The problem was the description on the web site. Walmart stated that to use a 20lb propane tank, you would require an adapter hose. The fact is that this unit is designed to run on a 20lb propane tank and the require hose is included. I bought the hose as Walmart suggested and now I have to return it. A good product, but a very poor shopping experience!
Summary: if you want to buy Weber 320 do not think about converting it to natural gas. when I bought it I asked to convert it. they did but what happend since then I do not have even heat on the burner (I wonder if even with propane would be the same or not)