So my buddy and I had an idea (keep in mind, we had been drinking); we want to do a 10 gallon batch of a low gravity beer on our 5 gallon system.

We figured that we could double the grain bill for a low gravity beer and it will fit in our mash tun, but we only have the capacity to boil 7 gallons.

So if we simply double a low-gravity recipe, process it like a high-gravity 5 gallon batch, then add water prior to fermentation to equal 10 gallons would we end up with two five gallon batches of a low-gravity beer that would taste similar to the original 5 gallon recipe?

Is our logic flawed? If not, are there any pitfalls to be aware of?

Thanks in advance and good health,

Curt and Ken