The largest option in the range, joining an AN12 male flare to an AN12 female swivel with a 1/8″ NPT female branch. AN12 lines are usually reserved for pump suction, dry sump scavenge, oil cooler returns and coolant swirl pot plumbing, where restriction matters and a conventional tee would be bulky. Adding the sender through this union keeps the big line straight and the sensor tucked to one side. The 37-degree flare seats mate with any AN12 hose end or adapter. Given the size, plan for spanner clearance before you commit to a position, and seal the tapered NPT thread properly since large lines are awkward to strip down again.