Malone,
Yep, big stand alone shut off valve in the line from the tank to the filter – as built by Dickerson. It's up “above” the filter, sort of out of the way mounted on a bulkhead…..
I have 2 in line filters – a big “can” in front of the Racor. 20 micron big filter…10 micron Racor. Racor stays real clean…I also have a vacuum gauge for the Racor to determine filter condition…..A long, expensive, story…….
I'll send a photo if you would like one.
Mike