Plug for tank valve - what to put on o-rings

[Scubaroo]

Hi,

I'm about to remove a H adapter from a tank valve and install a plug (plug was cheaper than a second regulator) - there are two o-rings on the plug - should these be left dry, smeared with silicon grease, or some other grease used? The tank is for air only, not Nitrox.

Ben

 

[devjr]

A tiny bit of silicone will do the trick. The alternative would be one of the oxygen approved greases, such as Krytox or Crystalube(sp). A small tube of this stuff costs about 10 bucks though.

 

[roakey]

Originally posted by bengiddins
should these be left dry, smeared with silicon grease, or some other grease used? The tank is for air only, not Nitrox.

You never “smear” anything on O rings. You put a tiny amount on your fingers and rub it on the O ring so the O ring is shiny, nothing more. I also put some silicone/Christolube on the threads to keep them from seizing. Remember that the threads are exposed to the water.

Roak

 

[Scubaroo]

Yeah - I know how to grease an o-ring - less is more.