SonexBuilders.net

I'm having a little trouble parsing your last sentence, but I think what you're saying is you're going to try the EMPI cover/filter with the bypass valve on a 26mm pump.
If so, I like this idea.
I have always been skeptical of these filter/pumps; knowing the EMPI unit has a bypass makes me more likely to try one.

Be sure to map-out the passage holes on the cover versus the holes in the body. They don't always match up with different brands of pumps. I had to elongate the hole in one to match the hole in the other.