"Abe" wrote in message
...
It's a Honeywell-Braukmann F76 with 100 micrometer cartridge. The
manufacturer web site says it never needs replacing as long as it is
backwashed periodically.
Where did you find out the brand and model?

There's a pressure gauge on top. I didn't think to look at it because I
thought the gauge was a separate device, but it was identified there at the
gauge. I then looked on line and confirmed at Honeywell.