[PSUBS-MAILIST] Original MBT vent?

[Jon Wallace via Personal_Submersibles]

 What about a union?

    On Thursday, June 10, 2021, 06:34:37 PM EDT, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
  I like the simplicity of this vent valve set up. It could be built with bolt together flanges allowing for maintenance.  Stop valves should not be needed because the valve is so close to the hull, and really how much different is it to having a valve with a nipple into a penetration.   I can see it not passing but,,,,Hank

   
  
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