Cat 3126 Airsep Restriction Guage?

[dtfeld]

What is the correct restriction guage for the Walker Engineering Airsep on Cat3126’s? On my boat one was destroyed, and the other I just removed is 25” H2O (of course the info was pointed out of site)!

I thought I researched this and I purchased 15” H2O versions. Walker Enginnering site doesn’t give that info. Now I’m wondering if I have the right ones. Choices are 15, 20 and 25 inches H2O best of my knowledge.

Old one...

 

[dtfeld]

I found the Cat Part#, I'll have to call CAT on Monday