I would fill tanks with fresh water and cycle valves a few times. They also make an sewer cap with a garden hose connection- this can be used to run water backwards.
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2011 F250- gas- 4 star tuner- k&n intake
2011 Cougar 325srx
2015 KTM 350 exc-r
KTM 300 xc-sold
ktm 450 exc-r
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