Here's a pretty decent AWG Piston Intake Valve 6.00NH. The valve handle spins (tighter than the Akron) and opens/closes the valve properly. This one has seen some use. The paint is peeling on the Kochek Storz cap and it has some scratches and wear (please look at the pictures closely for overall condition). I do not see any physical damage to this unit other than what appears to be typical water deposits inside. From the previous department - I was told that this works as it should, but that they were replacing or changing out existing equipment.