Jeanneau LEADER 9 Owner's Manual - page 58
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FILLING WATER AND WATER HEATER TANKS
Deck filler - Location
Water tank capacity: 160 litre
Tank
Location: Aft cabin
Gauge
Location: On the fuel tank
WARNING
The tanks' nominal capacity cannot be fully used due to the load and the
need to maintain the correct trim. A 20% reserve should be kept.