Thread: Black tank knife valve not closing all the way.
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Old 01-16-2014, 02:52 AM   #11
kdeiss
Montana Master
 
Join Date: Feb 2003
Location: Englewood
Posts: 3,095
M.O.C. #164
You can try Thetford Tissue Digester and follow instructions on the bottle they also make a valve lube that you add to the tank!
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