Hello everyone - I have an old Perflex DE Filter that is either an EC65A or an EC75A. The label on the filter shows both models side by side with what looks like an circle indicator at the top that should be marked or punched, but isn't.
The question is how to tell which filter I actually have? Does anyone have any experience or idea how to do this?
Thanks for any help!
EDIT: So, I found in the manual for the EC65A/EC75A that the only difference seems to be the tube length, with the EC65A being a ~13" tube. Mine measure just a tad under 13", so I assume the measured length plus the plate thickness would be the approximate length of the EC65A tube spec. Just putting this out there in case someone else runs into this issue.



The question is how to tell which filter I actually have? Does anyone have any experience or idea how to do this?
Thanks for any help!
EDIT: So, I found in the manual for the EC65A/EC75A that the only difference seems to be the tube length, with the EC65A being a ~13" tube. Mine measure just a tad under 13", so I assume the measured length plus the plate thickness would be the approximate length of the EC65A tube spec. Just putting this out there in case someone else runs into this issue.



Last edited: