Dump valve won't close all the way
My black tank dump valve suddenly started not closing all the way. About 1/4" left to go on the shaft. I tried opening and closing it several times, but no luck. I'm guessing maybe TP is stuck in t...
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You can also backflush it with no tools needed.
Empty black tank, leave valve open.
Cap the outlet.
Open gray tank valve. Gray will flow backwards into black tank piping.
Empty black tank, leave valve open.
Cap the outlet.
Open gray tank valve. Gray will flow backwards into black tank piping.
