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Old 10-13-2016, 11:28 AM   #1
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Holding Tanks, Open or Closed

Getting ready to stay parked for more than a month. Need opinions on the holding tanks. Leave them open? Leave them closed and dump when needed? Use enzyme treatments while parked? What do you guys do? Usually camp without hookups and use dump stations so not experience at sitting for a long time.
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Old 10-13-2016, 11:31 AM   #2
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ALWAYS leave the BLACK tank CLOSED.

The gray tank is up for debate. Lots leave them closed and only open at dumping time. Lots leave them open (and close just prior to black tank dumping, so they have gray water to flush the sewer hose).

We use something similar to the geo method for our black tanks. Dawn dish soap and borax and/or Calgon.
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Old 10-13-2016, 11:38 AM   #3
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I'll echo the advice on the black tank. When all the liquids drain off, only the solids remain and they can form a formidable layer of poopcrete on the bottom of the tank.

I keep my galley grey closed for the same reason... there are solids in there too and the contents can smell worse than the black. I want as much liquid flushing power as possible when emptying the tanks.
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Old 10-13-2016, 07:36 PM   #4
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I'll echo the advice on the black tank. When all the liquids drain off, only the solids remain and they can form a formidable layer of poopcrete on the bottom of the tank.

I keep my galley grey closed for the same reason... there are solids in there too and the contents can smell worse than the black. I want as much liquid flushing power as possible when emptying the tanks.
Love that term "Poopcrete". I've been leaving it closed and using enzyme to break up the "Poopcrete". Seems to work. Had it plug up one year and it was a b--ch to get it cleared. Try to use lots of water also. Guess I'll stay with that program. "Poopcrete
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Old 10-14-2016, 12:15 AM   #5
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Another common term is Poop Pyramid!!!! I am sure you get the picture!

I will echo the post about grey also having some stench at times...as careful as we are about what goes into the drain, it still can develop a strong smell. So I like having as much liquid in there as possible to in oirder to get a good flush.
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Old 10-14-2016, 09:34 AM   #6
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Another common term is Poop Pyramid!!!! I am sure you get the picture!

I will echo the post about grey also having some stench at times...as careful as we are about what goes into the drain, it still can develop a strong smell. So I like having as much liquid in there as possible to in oirder to get a good flush.
Nothing like RVing to get us to visualize Poop Piles. I use enzyme treatments in my Galley Grey water tank periodically to break up food particles and kill the smell. I just break open the packets, (don't want those dissolvable bags down there, they screw up your sensor contacts). Seems to keep the Galley Tank from stinking. Have to pour water to flush it through the trap. Put it in before you travel so it will slosh around.
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Old 10-14-2016, 10:05 AM   #7
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Always leave ALL tanks closed until they are least 2/3 -3/4 full, otherwise you are venting the entire campground thru your trailer. Just a fact of life.
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Old 10-14-2016, 10:53 AM   #8
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Always leave ALL tanks closed until they are least 2/3 -3/4 full, otherwise you are venting the entire campground thru your trailer. Just a fact of life.
You also risk getting Roaches and other bugs in your holding tanks.
I also create a trap with my dump hose by having a section of it low to collect water blocking smells and bugs etc.
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Old 10-14-2016, 03:22 PM   #9
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Absolutely closed until you need to empty.
When I do keep the grey water valve open, I plan to close it the night before so I have plenty of grey water to flush after the black water tank has been emptied.

Regards,
Fred
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Old 10-14-2016, 03:57 PM   #10
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Thanks all. Great advice for this newbie as well.
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