20-0461 Fuel Level Switch, 1/8 NPT This 1/8" NPT fuel level switch should be installed inside the container, as shown below.  When fuel level drops, a switched signal can be sent to a unit such as a dashboard mounted indicator or programmable ECU input for safety purposes. The level switch is constructed of corrosion resistant stainless steel compatible with all fuel types. It includes 24" long, 20AWG flying leads. NOTES: 1. Prior to installing, check the direction of the signal on a test bench.2. Switch polarity can easily be reversed by removing the E-clip and flipping the float.3. 1/8" NPT threaded port is required for installing.4. Always apply PTFE thread sealant to tapered pipe threads.  Instruction PDF