My fuel system, shut off at tank feeds Racor feeds mechanical fuel pump feeds bulkhead mounted SS 1/8" ball valve to F/P gage "tee'd into valve exit port" to the carb.
I disconnected my fuel level gage intentionally and did not use the polishing filter. I ran the engine a lot so the fuel was always good and checked with a dipstick.
Don't like electricity near my fuel except in the combustion chamber
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Dave Neptune