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Old 08-08-2018, 11:46 AM   #2
wingnut60
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Join Date: Sep 2005
Location: Where we park it
Posts: 2,838
An RV usually has 2 holding tanks--black water (toilet) and grey water (sinks and showers). If you can visually see down the toilet throat/pipe into the tank (some toilets are directly above, others have piping going off to side and you can't see tank bottom), look for any buildup on the tank bottom. Outside of that inspection, be sure if you run toilet water into the tank, it will drain out. Also, be sure the black tank valve will operate to open/shut correctly. Close tank valve and run water into black tank--if flow stops from drain/sewer connection, valve is working. Then open valve and see if flow resumes. You can only check this if there is a sewer hookup and a clear section off the drain connection.
Good luck.
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2016 Tiffin 40 QBH
2015 38RSSA, traded
2005 TK3 #1869, 10 yrs of memories,
2017 F450 KR--one more Ford is it
2009 F450 4x4-died; 2010 F450-retired
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