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Old 03-22-2015, 09:21 AM   #1
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Gray 1 Overflow to Gray 2

Hello fellow campers. We have a new Wildwood 327RE with two 30 gal gray tanks. After just a couple of days gray 1 (bathroom) is almost full but gray 2 (galley) is almost empty. If we keep filling the gray 1 tank will it overflow to the gray 2 tank?

We just upgraded from an Outback which had only one 30 gal gray tank and thought the Wildwood would give us more days of gray storage. If gray 1 doesn't overflow to gray 2 then the upgrade has not benefitted us much.

Thanks for your input. GB
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Old 03-22-2015, 09:33 AM   #2
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On my 5er, I connected the galley tank to the grey tank with hard piping and I can, but don't, open both tanks and fill both. I just fill them independently and empty them independently also. I also added a valve at the outlet to be able to fill them at the same time and the added valve also keeps from having a surprise when the cap is removed.
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Old 03-22-2015, 09:57 AM   #3
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I also added a valve at the outlet to be able to fill them at the same time and the added valve also keeps from having a surprise when the cap is removed.
I also added one for the same reason. I haven't tried it, but I see no reason that with this valve shut, you couldn't open both grays and let the water level itself. Have you done this?
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Old 03-22-2015, 10:07 AM   #4
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I also added one for the same reason. I haven't tried it, but I see no reason that with this valve shut, you couldn't open both grays and let the water level itself. Have you done this?
Once or twice, but with my CRS, I don't. With CRS, I'd probably forget and open the black tank and I sure don't want to mix the 3.
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Old 03-22-2015, 10:41 AM   #5
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I'm going to have to try it sometime. Might make a difference of being able to squeeze in a couple more showers instead of getting the toter our.
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Old 03-22-2015, 04:28 PM   #6
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My wildcat 295 new 2016 has the 2 grey tanks. I made sure black was completely shut and opened both Greyson to share/level them. To my surprise they both emptied and filled the Black. The black had been at 1/3. I guess the pressure of the two greys pushed into the black.
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Old 03-22-2015, 04:43 PM   #7
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My wildcat 295 new 2016 has the 2 grey tanks. I made sure black was completely shut and opened both Greyson to share/level them. To my surprise they both emptied and filled the Black. The black had been at 1/3. I guess the pressure of the two greys pushed into the black.
Suspect the bt valve was not closed. Outside pressure will not overcome a closed valve.
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Old 03-22-2015, 05:34 PM   #8
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Suspect the bt valve was not closed. Outside pressure will not overcome a closed valve.
It's a new trailer with a dock cabinet that has all three controls as 3 side by side handles. I'm sure the Bt was pushed all the way in. Because it's new my fear is that it's not properly installed. Having the dealer check it.
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Old 03-22-2015, 08:09 PM   #9
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Thanks

Thanks for all the inputs guys. Opening both gray valves should work provided both gray tanks are at the same level. I'm worried that the bathroom tank is mounted higher than the galley tank which would result in overfilling the galley tank. I'm disappointed that the only difference between this RV with 60 gal. of gray capacity and our previous RV with a single 30 gal. tank is that we get to wash more dishes. It would be much better if the gray was just one big 60 gal. tank instead of two 30 gal. ones. GB
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Old 03-22-2015, 08:45 PM   #10
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The handles could be mislabeled. They are on mine, black is labeled gray and gray is labeled black. I could tell because I have a clear hose adapter on my sewer line. When I pulled the handle labeled black clear water came out. I quickly closed it and pulled the handle labeled gray and the crappy water came out.
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