We have the rsts291 and the overflow tube is behind the rear tire, drivers side about 3 feet, near the frame rail. Mine has two tubes, one is the overflow and I believe the other is the vent.
Definitely there's an overflow about three feet behind axles on left side. There will be no doubt when tank is full (which is quite a while after last tank level light comes on).
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]2018 Eagle 321RSTS-sold
2021 Pinnacle 36SSWS
2020 F350 CC LB DW 6.7
1973 IH 1210 CC
1975 IH Travelall
1979 IH Scout II
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