42 ** WHEN DRAINING VESSEL TO CHANGE CARTRIDGES: 1. Drain vessel completely through ball valve #2 above. 2. Drain a few gallons out of manual drain valve “A” (or plug) located at the bottom of the inlet elbow. This insures no fuel remains trapped inside coalescers. (Otherwise unfiltered fuel from inside the coalescers could make clean-up of the sump more tedious.) NOTE: A flow indicator valve (not provided by Parker Velcon) is recommended so that operator will remember to close valve #2 when filling the vessel. It also shows operator when the vessel is completely drained. RecommendedManual DrainHookup Filter/Separator Vessels
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