Forum Discussion

Ramblin__Ralph's avatar
Jun 28, 2019

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 the valve. Obviously this results in black water filling the space between the valve exit and the end of the dump tube. Messy to deal with! :(

Any suggestions?

Thanks,
  • I had the same problem awhile back. I opened the valve and flushed several times before disassembling the valve to find out why it wouldn't close. I found the disk from the hole the builders cut into the tank for the toilet jammed in the valve. There's no way for it to pass through the dump valve - it could only be removed by taking the valve apart.

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