Thread size

Please register or login

Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.

Benefits of registering include

  • Ability to post and comment on topics and discussions.
  • A Free photo gallery to share your dive photos with the world.
  • You can make this box go away

Joining is quick and easy. Log in or Register now!

It should be the standard thread for any other tank valve of 3/4"X14 Straight thread.

Only a select few tanks for scuba application (in America) were ever made with other threads.

Edit: Correction, some 3500psi tanks had 7/8"X16 straight threads
 
Wow, not sure on the specific brand. Most tanks are 3/4"-14 NPT. Older tanks sometimes had 1/2" tapered thread, but they're few and far between anymore.
 
Can you provide the tank stamping information?
 
is there anything that makes you think the tanks would be anything other than 3/4"-14 NPT?

that's the overwhelming standard in the US
 
Tank is 4 years old DOT E13483-3500 3216355y TP5250 HP100
 
3500 psi cylinders are 7/8" threading, as far as I know.
 
3500 psi cylinders are 7/8" threading, as far as I know.

hmmmm ... you're right:

When Pressed Steel Tank Company began manufacturing the modern 3500 psi service pressure SCUBA cylinder, they elected to use a more modern thread form for the neck opening known as Unified National Standard Fine. The specific thread form used with the steel 3500 psi SCUBA cylinder is named 0.875-14 UNF, often referred to as "7/8 UNF."

SCUBA Valves: Regulator Fittings, 200 vs 300 Bar FAQ and Cylinder Neck Threads - Dive Gear Express
 
https://www.shearwater.com/products/teric/

Back
Top Bottom