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Old 03-08-2011, 05:01 PM   #1
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Question about black/gray drains.

I have 3 tanks, one outlet: galley Grey, bathroom Grey, and black. The Galley works as I thought it should, pull the handle and it drains out but the bathroom Grey and black are piped together. I understand wanting the ability to put Grey water in the black tank to increase Grey capacity and help flush the black tank. However, I cannot dump my bathroom Grey without dumping the black. If I pull the bathroom handle and the black tank is shut the Grey only flows into the black. I have to pull the black tank handle (and empty the black tank) to empty that Grey tank. This is all fine and dandy in a full hookup CG but the situation may arise where I do not want to empty the black...like when I'm using my portable tank in a CG without full hook ups. Is this the way it's supposed to work or should I be able to dump the Grey tank without dumping black.
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Old 03-08-2011, 05:36 PM   #2
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This definitely does not sound right. I just sent you a Private Message.

Thanks!

PTM
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Old 03-08-2011, 05:42 PM   #3
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This definitely does not sound right. I just sent you a Private Message.

Thanks!

PTM

Maybe you should share the proper setup. I had a similar issue with another brand camper. I am not sure yet what the setup in my new camper is, but I will be looking for this.
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Old 03-08-2011, 05:48 PM   #4
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On the Crusader, the Bath Gray and Bath Black should not be plumbed together. I can't speak for other brands or manufacturers.
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Old 03-08-2011, 06:10 PM   #5
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Incoming....at thanks for the speedy reply!
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Old 03-08-2011, 07:22 PM   #6
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You can have as many tanks as you want all piped to a common outlet/sewer connection, but each tank has to have it's own valve...can't be any other way!

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Old 03-08-2011, 09:35 PM   #7
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I have a galley, grey, and black. One outlet, only two valves. The one valve empties the black, the other valve empties the galley and grey.
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Old 03-08-2011, 09:50 PM   #8
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I've seen kits that re-plumb grey to black. At first I figured my trailer came like this. Guess that's not the case and someone will be in touch with me tomorrow.....How's that for service?
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Old 03-08-2011, 10:19 PM   #9
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I have a galley, grey, and black. One outlet, only two valves. The one valve empties the black, the other valve empties the galley and grey.
Same here on my 303 RKS. Not sure how that is supposed to work (one handle for both galley and grey tanks). Since the underbelly is enclosed I can't see how the handle works. If there is no "valve" on the galley tank, does the water flow into the grey tank until ready to dump? I don't think so because both tanks' level sensors will show some level of fulness.
I do know this......It takes a very long time for the galley/grey tanks to empty. I have gotten a steady trickle for about 10 minutes. When your at a dump station with other people waiting, that seems a bit too long to get the tanks empty.

Maybe RVGUY can shed some light on this...... RVGUY, can you post a schematic of the underbelly layout so we can all understand how the drain/valve system works?

Thanks,
Rick
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Old 03-08-2011, 10:24 PM   #10
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Same here on my 303 RKS. Not sure how that is supposed to work (one handle for both galley and grey tanks). Since the underbelly is enclosed I can't see how the handle works. If there is no "valve" on the galley tank, does the water flow into the grey tank until ready to dump? I don't think so because both tanks' level sensors will show some level of fulness.
I do know this......It takes a very long time for the galley/grey tanks to empty. I have gotten a steady trickle for about 10 minutes. When your at a dump station with other people waiting, that seems a bit too long to get the tanks empty.

Maybe RVGUY can shed some light on this...... RVGUY, can you post a schematic of the underbelly layout so we can all understand how the drain/valve system works?

Thanks,
Rick
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