FYI---
Twirap – The valve you show up above is called a globe valve. >> 
Ball valves have a hole through the ball part of valve like this one >>
BTW- They have ¼ inch threaded brass check valves, like this one. >>
{ I know this one is what they call a slip, but they make them also in threaded. This was just a quick picture of what I could come up with as an example.}