3/4" cross

I'm putting in a moen vertical spa, and according to the directions, I use the one output plugging the bottom outlet) from the 3371 valve and have it feed three 3/4" volume valves. Theres only a picture, but it looks like I'll need a 3/4" copper cross, which I found for $20 at the local plumbing supply. The price seems excessive, but I guess that's what you use, unless I'm missing something.

Or you could stack two 3/4" tees.