ocluke -- if you want to recirculate, a cheaper way to attach a pump to a female ball lock is to use these two parts:
- 3/8" Stainless Flare to 3/8 barb adapter
if you prefer a 1/4" barb)
- Firestone liquid ball lock post
This makes the conversion with two parts instead of three, and it's less than half the price.
You'll want to use teflon tape to make this connection, as the seal is made by the threads. I'm attaching a picture of mine. (For a pump, I use my Mark's Keg Washer, since I already had one.)