Didn't like the Suntec pumps. They came fitted on an Italian built washer we used to sell & after a few months the fuel solenoid got weak, allowing fuel to dribble into the boiler. Tried a few different things to cure it but eventually the only cure was to fit a Danfoss pump!
Danfoss BFP 11 fuel pumps have the large filter under the side, BFP 21 have a cartridge that doesn’t need the side removing but is a more sensible size