ISO O-rings that aren't garbage

[wnissen]

Two purchases off of Amazon has found me with a bunch of o-rings that are garbage. By this I mean they don't work and my tank continues to leak. One set is hard as a rock and the other simply doesn't fit my yoke adaptor on my steel tanks. Looking for recommendations for good o-rings. TIA

Respectfully, o-rings are inexpensive, easily counterfeited life-support equipment. If it is off-spec (too thin, too small, too soft) and extrudes at the wrong moment, your tank could be empty in about a minute. I would not try to save a few bucks by buying them from Amazon. They commingle all their stock, so you are almost certainly not getting product from the company (or individual) on the listing.

I buy almost all my o-rings from McMaster-Carr O-Rings

I have an engineer and a technician I am close to, and this is where they get almost all their industrial supply. If it's good enough to go to space in a satellite, I would trust it on my tank.

 

[DevilEyeDog]

THANK YOU EVERYONE! Honestly I've been diving for 3 years and my knowledge of o-rings is limited to replace when you hear a hiss. I had no idea there were different qualities or materials until today. I appreciate the picks too!

 

[Akimbo]

At least in North America, any authorized Parker dealer is a safe place to purchase quality O-rings.

THANK YOU EVERYONE! Honestly I've been diving for 3 years and my knowledge of o-rings is limited to replace when you hear a hiss. I had no idea there were different qualities or materials until today. I appreciate the picks too!

You might find these links useful for general information on O-rings:
O-rings for Divers

Scuba Cylinder Valve Installation

 

[deeper thoughts]

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