Q: What direction are the threads on these manifolds?
A: 1/4" NPT Right handed thread
Q: I got one that looks Identical to this on Amazon, (sorry) It was junk. How is the quality of this valve / manifold? Is this chinese made?
A: We have not had issues with this particular manufacturer as we use these on our assemblies and wholesale this part to other suppliers. The manifolds are currently produced in China
Q: What size is the male threads on the inlet barb and outlet plug?
A: 1/4" male NPT on any of the male threaded fittings on the manifold
Q: can this be used with nitro?
A: yes, it can be used with co2 or Nitrogen
Q: Can another manifold be added on to this manifold? If so, how difficult is it?
A: You can easily add another manifold. Just unthread the plug on the left side of the manifold, and replace it with a 1/4" MPT barb.