Westerbeke BTG-9KW Operator's Manual page 17

Basic Fuel System Layouts with Anti-Siphon Protection
FUEL LINE ALWAYS ABOVE FUEL TANK TOP LEVEL
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NO ANTI·SIPHON DEVICE OR ELECTRICALLY
OPERATED VALVE NEEDED
ANTI·SIPHON DEVICE OR ELECTRICALLY
0-,.----
OPERATED FUEL STOP VALVE
- - - - - - ; p
FUEL TANK TOP LEVEL
FUEL liNE BELOW FUEL TANK TOP LEVEL
ANTI·SIPHON DEVICE OR ELECTRICALLY OPERATED FUEL STOP
VALVE AT FUEL TANK WITHDRAWAL FITTING
ANTI·SIPHON DEVICE OR ELECTR ICALL Y
FUEL TANK TOP LEVEL
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OPERATED FUEL STOP VALVE
FUEL LINE BELOW FUEL TANK
TOP LEVEL
ANTI·SIPHON DEVICE OR ELECTRICALLY OPERATED FUEL
STOP VALVE AT POINT WHERE FUEL DISTRIBUTION LINE
GOES BELOW FUEL TANK TOP LEVEL
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