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RV-Dreams.com Home -> RV-Dreams Community Forum -> RV Maintenance and Technical Tips -> Waste Pipe Fiasco
Post Info TOPIC: Waste Pipe Fiasco
Mister G


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Waste Pipe Fiasco
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Went on first RV outing last weekend.  When attempting to empty the gray tank after the black tank, we couldn't get the water to flow throught the hose.  Had to keep lifting and jiggling the hose to get the water to flow along the tube and into the sewer hole. 

Can anyone offer advice?  Was this an issue of gravity (not having a downward enough slope for the hose)?  Could it be a clog?  Did we not have enough pressure coming out of the tank?

Any insights greatly appreciated.  Would like to avoid that unenjoyable experience again. : )



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NorCal Dan


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Very strange issue. Gray tank is just water so no reason for it to not flow easily. If the black tank emptied ok then the gray should not have a problem. Check the hose for clog.

Is this a new rig or used?

I think the first thing to do is verify the sewer hose if free of debris. Next I would run a closet auger or snake from the dump valve to the gray tank and verify nothing is blocking the pipe. If nothing found then check the roof vent to verify it is not clogged.

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GENECOP


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Something is clogged, definitely not normal....

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RVRon


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You might also check your vent stack pipe for the grey tank.  If it's clogged then it won't let air in to replace the water you're trying to drain, creating a vacuum. The water would drain very slowly as a result.



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Mister G


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Thanks!



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Mister G


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Thanks for all the replies.  I will investigate the items everyone mentioned. 



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