O-rings kit? Which o-rings to carry?

[hroark2112]

I'm thinking I need to start carrying a kit of o-rings with me regularly. What I'm looking for is the most common o-rings needed for in the field repairs. I'm not looking to rebuild regs on a dive boat, but I do feel I should have the most common ones handy.

Anyone have a good list by number/size that would make a good kit of viton o-rings?

 

[tbone1004]

https://www.divegearexpress.com/orings

google fu my friend.

Amazon sells them in bulk for pretty cheap, o-ring kits from anywhere have the common ones

 

[hroark2112]

Nice...tanks!!

 

[uncfnp]

180 Piece Viton Professional O-Ring Kit

Lots cheaper then buying some of each size you need, even if some of the sizes you never use. Then pick out 3 or 4 each of the sizes you need for your gear and pack into your save a dive kit.

 

[JahJahwarrior]

003 and 010! And whatever fits your regulator depends on din or yoke. McMaster Carr buy 100 and you should be set for a while, plenty left over to give out to friends depending on how much you dive.


Sent from my iPad using Tapatalk

 

[ams511]

https://www.oringsusa.com/html/scuba.html

 

[mockney]

Slight post hijack.... but as we are on the subject, I have just started using a 'Din' regulator where the 'O' ring is very different from the 'Yoke'.

My question being, do you insert the 'O' ring into the tank and then the regulator or do you fit the 'O' ring onto the regulator and insert both into the tank?. I have done the latter but am concerned about it fitting/sealing correctly.

Thanks

 

[Peter69_56]

Slight post hijack.... but as we are on the subject, I have just started using a 'Din' regulator where the 'O' ring is very different from the 'Yoke'.

My question being, do you insert the 'O' ring into the tank and then the regulator or do you fit the 'O' ring onto the regulator and insert both into the tank?. I have done the latter but am concerned about it fitting/sealing correctly.

Thanks

Thee O ring goes into the regulator then the whole assembly goes into the valve. Make sure you are using the right O ring as the incorrect one may keep falling out when you remove the regulator from the valve. Under normal circumstances the O rings sty in the regulator no problem.

I use Polypropylene and have found that although the original ones stay in fine, sometimes the replacements do have a tendency to fall out and I am not sure why yet.

O Ring Number	Description
003	HP Hose SPG swivel
006	BC Power Inflator
007	Oceanic Pro Plus 2 quick disconnect small O ring
009	Oceanic Pro Plus 2 quick disconnect internal seal
010	LP Hose/2nd Stage regulator to hose seal DIN Valve stem
011	Standard LP Port/Hose, Manifold port plugs
012	HP Port/Hose, manifold port plugs, Oceanic quick disconnect end seal, Petrel battery seal
013	Large LP port/Hose plugs (3/8 UNF)
014	Small Yoke Reg/K valve (Joe)
015	Cylinder valve bonnet nut
022
111	Small DIN reg/valve
112	Standard K/DIN reg/valve (5/8 BSP)

 

[Lorenzoid]

When ordering by number rather than description, don't fat-finger the number--some differ by only one digit--or you'll end up with a dozen of something you have no use for, as I did. Doh!

 

[ams511]

I use Polypropylene and have found that although the original ones stay in fine, sometimes the replacements do have a tendency to fall out and I am not sure why yet.

I have never heard of polypropylene O-rings, either they are Buna (nitrile), Viton (FKM), EPDM, or Polyurethane. If they are polyurethane it could be that they are old and lost their elasticity. I believe the shelf-life of polyurethane O-rings is less than 5 years. Of course I am assuming you are using the correct size and durometer for the application.

A few years back, some regulator manufacturers started using PU O-rings because of their superior abrasion resistance. I believe they no longer use them because of the short self-life.