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Old 03-11-2021, 08:26 AM   #1
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Exclamation 2019 Jayco Precept Black Tank issue

Drained black tank as usual, hooked up hose to black tank clean out. Was draining fine. Checked a few minutes later and no clear water draining? Closed black tank, disconnected clean out hose. Black tank reading 3/4 full? Added more black tank digesting chemical. Now what?
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Old 03-11-2021, 10:34 AM   #2
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Since it WAS draining and then STOPPED it sounds like the 'cut-out' disc was left in the tank and has now been pulled down to the tank outlet blocking the flow

'Cut-Out' disc....when toilet line to tank, vent line to tank, outlet line from tank are installed they cut out the opening. Discs are not suppose to be allowed to fall inside tank....but floor jockey gets paid by numbers and if disc falls inside Oh Well!

If it is the disc you will continue to have ongoing draining issues
Have to disassemble dump valve/drain pipe etc to access the tank outlet and remove the disc

Other then Disc blocking I can't think of another reason for perfectl y draining tank to just STOP

IF you had closed the dump valve and then when opening it tank didn't drain then I would say dump valve is not opening
But you stated it stopped draining and THEN you closed the valve
**Should never walk away when using flush connection
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