We hydro and VIP tanks to scrutinize the metal integrity and threads to avoid unpleasant outcomes when put under pressure.
But what are the issues with tank valves? We can easily inspect the threads, change the seats, burst disk assemblies, and 0-rings - but is there a limitation on the J-valve’s or K-valve’s useful life from an integrity perspective?
Does Brass get brittle under pressure cycles?
Does the chrome hide cracks in the threads that should be of concern?
I have seen plenty of pristine J-Valves that were manufactured 30 years or more ago.
What is the consensus among the highly experienced VDH divers and technicians when it comes to vintage valves?