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Howdy neighbor, just pulled in near you today and will visit tomorrow if your around. Yes the good ol vacuum breaker will do it every time if you do not winterize it. I blow out all my lines with air and always have to remember the black tank flush line, and also the water line from the fresh water tank to the pump etc......
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Ron 
99 Freightliner FL70 Western Hauler CC 300 HP Cat/Chipped/ Allison Auto
12 Montana 3800RE/Level-Up Auto Leveling/Slide Toppers/MorRyde Hitch/VuQube 2000
01 F350 7.3 PSD Crew Cab DRW 4X4 6 Speed/Chipped
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