Sega WaveRunner Owner's Manual page 179

WAVERUNNER GP COMPRESSOR TANK
There is a petcock provided on the bottom of the compressor box to enable draining of accumulated
condensation from the compressor tank. It is recommended to drain any moisture from the tank at
least once a week to minimize oxidation and extend the life of the tank.
The petcock is located on the bottom of the cabinet on the players left and may be accessed without
opening the compressor box lid.
Figure 1 Top View - Drain from tank
Figure 2 Bottom View - Petcock Access
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