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Old 07-02-2015, 07:12 PM   #1
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RV park protocol: What dump valves to leave open?

From reading this forum, I know not to leave the black open until Im ready to dump. What about my grey tank? Can I leave it open the whole time so that my shower and sink water dont fill it up?
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Old 07-02-2015, 07:17 PM   #2
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When it is time to dump the black tank, you will want a pretty full grey tank so that you can use that water to flush the stinky slinky and push the rest of the solids out. You can leave the grey open until you need to start "storing" grey water in reserve for that black tank "push." \ken

PS. I'm assuming that you are connected to a sewer, right? Don't leave the grey tank open if you aren't!
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Old 07-02-2015, 07:17 PM   #3
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Some people do, but I do not. Any sediment tends to be left behind and can cause problems in the future. Leave both black and grey closed and that will also allow you plenty of grey flush water after you dump the black.
Happy camping!
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Old 07-02-2015, 07:28 PM   #4
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Quote:
Originally Posted by Bumps View Post
When it is time to dump the black tank, you will want a pretty full grey tank so that you can use that water to flush the stinky slinky and push the rest of the solids out. You can leave the grey open until you need to start "storing" grey water in reserve for that black tank "push." \ken

PS. I'm assuming that you are connected to a sewer, right? Don't leave the grey tank open if you aren't!
Sewer? I thought im supposed to run the slinky hose to the curb. Just kidding. Yes, I have a sewer. Thanks for the response.




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Some people do, but I do not. Any sediment tends to be left behind and can cause problems in the future. Leave both black and grey closed and that will also allow you plenty of grey flush water after you dump the black.
Happy camping!
Makes sense. I wasnt sure because I see a lot of folks around here with there dump hoses out.
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Old 07-02-2015, 07:30 PM   #5
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Originally Posted by LarrytheBear View Post
Some people do, but I do not. Any sediment tends to be left behind and can cause problems in the future. Leave both black and grey closed and that will also allow you plenty of grey flush water after you dump the black.
Happy camping!
That's what I've done for over 40 years and have never had a sewer problem, but, whoever owned the Magna before we bought it didn't And I'm still trying to get it cleaned out.
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Old 07-02-2015, 07:34 PM   #6
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We don't even put out our hoses until we need to dump. Makes the campsite look so much better. 😌


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Old 07-02-2015, 07:37 PM   #7
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One comment: Ever see the add in an RV magazine for expensive and useless Black Tank Chemicals.. You know the one. Shows a Stinky RV.

Well. I found out how to make that happen.. Just leave a valve open and use a SLUNKY or other sewer hose support so the hose does not form a water trap (Required in some areas like Lost Wages, NV).

Yup. sewer gasses backed right up out of the ground through my Gray tank and out the vent. Stinky stuff.. That's why I keep 2 of my 3 valves closed.. Gray 2 (Bathroom and shower) drains via a 3/4 inch hose that is not supported and forms a natural water trap.
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Old 07-02-2015, 08:02 PM   #8
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Accidently left a valve to black tank open and had sewer flies in the black tank for a while until I opened the toilet and sprayed bug spray for a few seconds then closed it. Nastiest bugs I can imagine!!
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Old 07-02-2015, 08:58 PM   #9
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When dumping, just make SURE that he slinky is SECURELY fastened to the fitting at the end of the slinky, the one that you hook up to your tank drain . . . . Don't ask me why I am giving people this advice okay? It hasn't been long enough to be able to laugh about it yet.
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Old 07-02-2015, 09:03 PM   #10
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Quote:
Originally Posted by Hit_the_Rhod View Post
When dumping, just make SURE that he slinky is SECURELY fastened to the fitting at the end of the slinky, the one that you hook up to your tank drain . . . . Don't ask me why I am giving people this advice okay? It hasn't been long enough to be able to laugh about it yet.
A Robin Williams "RV" moment?
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Old 07-02-2015, 09:05 PM   #11
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Through experience we dump the tanks every 3rd morning...never a problem since we adopted a routine.
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Old 07-02-2015, 09:37 PM   #12
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From reading this forum, I know not to leave the black open until Im ready to dump. What about my grey tank? Can I leave it open the whole time so that my shower and sink water dont fill it up?
I leave my grey tank valve open. Otherwise, I'd be running outside every day to drain the tank.

To keep the sewer hose clean, after draining the black tank I flush the tank with water a few times.
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Old 07-02-2015, 09:48 PM   #13
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In 16 years of full-timing we never left the gray valve open except for at the very beginning of our travels. Then we noticed the crud left in the hose and figured that same crud was building up at the bottom of the tank. After that we let it fill up. It just takes a minute or so to dump the tank and we could go 10-12 days of boondocking before needing to dump. Even in RV parks we left it closed.

We also wiped our dishes and pots with a used paper towel or napkin before washing them. This got off the food particles and grease. We didn't put coffee grounds down the drain either.
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Old 07-02-2015, 10:19 PM   #14
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We also wiped our dishes and pots with a used paper towel or napkin before washing them. This got off the food particles and grease. We didn't put coffee grounds down the drain either.
Yes, we learned to do this as well.
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