2nd stage hose o ring size

[Timmyjane]

I keep reading that the second stage lp uses a 010 o-ring. The oring I pulled off the hose is smaller. I am referring to the o-ring that goes on the male part that fits into the second stage. When a 010 is installed on this portion the second stage will not fully seat against the hose. I hope the location is clear. The 010 seems fine on the end that attaches to the first stage.

 

[Timmyjane]

Here is a pic of an oring I just pulled. There are 2 010 orings for comparison.

 

[tursiops]

The purple one on the left is the one you took off the hose inner barrel?
When you say "smaller," do mean the cross-section of the o-ring or the I.D.?
The 010 should be correct on that barrel.
Actually, the two o-rings on the right look a bit larger in CS than an 010....more like a 110.
Here is a comparison chart:

 

[Kupu]

I keep reading that the second stage lp uses a 010 o-ring. The oring I pulled off the hose is smaller. I am referring to the o-ring that goes on the male part that fits into the second stage. When a 010 is installed on this portion the second stage will not fully seat against the hose. I hope the location is clear. The 010 seems fine on the end that attaches to the first stage.

Correct to guess the lp hose a SP superflow hose?
If so, the oem oring is an odd size with cross section that is thinner than the 010.

 

[tursiops]

Ahhh, the ScubaPro superflow hose. Of course. it does not use the standard 010.
It's a problem.
This post suggests a 903 or 902 o-ring.
Some say just try an 011.
The 010 is ID 0.239 in and CS 0.070 in.
the 902 i ID 0.239 in and CS 0.064 in.
The 903 is ID 0.351 in and CS 0.064 in.
The 011 is ID 0.301 in and CS 0.070 in.

As far as I can tell, the ScubaPro part number for your "correct" o-ring is 01-050-375.
Cross-referencing this, it is shown as ID 0.275 in and CS 0.060 in., and as Parker 5-020.
Cross-referencing Parker 5-2-2 gives ID 0.278 in and CS 0.046 in.
Looing for the closest AS568 o-rings suggests.....the 902 or 903.

Good luck.

 

[Timmyjane]

Wow. Thanks guys. What great info! I’ll try the 902 or 903.

 

[tursiops]

Wow. Thanks guys. What great info! I’ll try the 902 or 903.

Turns out the metric o-ring size is 1.5x7, with ID 0.276 in and CS 0.059 in.
I'd try that one first.

 

[Timmyjane]

I’ve got 902s and 903s in my drawer. If those don’t work I’ll try getting some metrics. I’ll why SP has to make things so difficult.

 

[Timmyjane]

@tursiops - A 902 worked. I was able to screw the 2nd all the way on. Ill test tomorrow in the water but I see no reason that it will not seal. Thank you for all the help.

 

[tursiops]

@tursiops - A 902 worked. I was able to screw the 2nd all the way on. Ill test tomorrow in the water but I see no reason that it will not seal. Thank you for all the help.

Great. Make sure it still swivels, too!