O-Ring Sizing Question

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johndiver999

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I recently saw a thread about ordering o-rings and I can't seem to find it again.

Anyway, I was thinking of ordering a lifetime supply of o-rings.

These are the ones I think I would use, do any of you experts have the O-ring sizes (and hardness) for these applications?

Thanks

  • LP hose end where it screws into first stage -
  • HP hose end where it screws into first stage
  • HP spool o-ring - the tiny ones
  • O-ring for the inside of the swivel on hose where the LP hose screws into a second stage
  • O-ring for the piston head in old sherwood first stages -- big and thin
Anything else I should order while paying for shipping??
 

marsh9077

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I recently saw a thread about ordering o-rings and I can't seem to find it again.

Anyway, I was thinking of ordering a lifetime supply of o-rings.

These are the ones I think I would use, do any of you experts have the O-ring sizes (and hardness) for these applications?

Thanks

  • LP hose end where it screws into first stage -
  • HP hose end where it screws into first stage
  • HP spool o-ring - the tiny ones
  • O-ring for the inside of the swivel on hose where the LP hose screws into a second stage
  • O-ring for the piston head in old sherwood first stages -- big and thin
Anything else I should order while paying for shipping??

  • 011
  • 012
  • 003
  • 010
  • Sorry not familiar with Sherwood regs.
For regular service Buna-N 70 duro is sufficient. For high 02 applications Viton should be used

For other o-rings I would suggest all the sizes used in your regs. also any other gear you have that uses o-rings. Computers, transmitters, torches, etc.

For example attached is a little cheat sheet I made for Apeks regs.
 

Attachments

  • Apeks o ring drawing.pdf
    39.8 KB · Views: 85

inquisit

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Don't forget o-rings for any dryglove system you might use.

Anyone know what o-ring would be appropriate for the suit-side ring in a Rolock 90 dryglove system? That one is pretty vulnerable when gloves are not attached.
 

GJC

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I recently saw a thread about ordering o-rings and I can't seem to find it again.

Anyway, I was thinking of ordering a lifetime supply of o-rings.

These are the ones I think I would use, do any of you experts have the O-ring sizes (and hardness) for these applications?

Thanks

  • LP hose end where it screws into first stage -
  • HP hose end where it screws into first stage
  • HP spool o-ring - the tiny ones
  • O-ring for the inside of the swivel on hose where the LP hose screws into a second stage
  • O-ring for the piston head in old sherwood first stages -- big and thin
Anything else I should order while paying for shipping??
Don't forget to get lots of 014 for tanks with yoke connections. If you rent tanks on the boat they usually have a lot of spares, but if you rent tanks on your own the boat may or may not have spares for you.

Get replacement o rings for your dive computer (and a spare battery).
 
OP
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johndiver999

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WOW thanks very much for the help. I already placed the order. Don't know how many times I have changed regulator hoses etc. and re-used an o-ring that was not pristine - I hate to bug the dive shop, they make like it is a big deal sometimes..

thanks

edit that was a little late.. LOL. I should have got a bunch of those too!
 
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johndiver999

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I've already used a bunch of those O-rings while switching hoses, fixed an annoying fizz and just replacing O-rings that I know are old. One of my better superfluous purchases to date. Thanks for the help.
 

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