Is there any toque / maintenance requirements? Is there a tech / maintenance manual?
Arthur(Certified Scuba Instructor at Scuba.com):
there isn''t a torque spec on this you just want it snug enough that it won''t come loose. This is a static O-ring to torque isn''t an issue.
More About This Product
Inline Shut-Off at Second Stage
Install between standard regulator hose and second stage 9/16-18 UNF male inlet to 9/16-18 UNF female outlet threads Slide machined Delrin collar to shut off gas flow Prevent critical gas loss Commonly used with deco rigs, stage bottles & drysuit inflation Low pressure use only - below 200 psi P/N HL404