Gray Water to Black Tank Transfer.

[TinTin]

Originally Posted by AnnArborBob

I'm just not comfortable with any scheme that may result in black water getting into the grey tank.

Agree!


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[Sylver Slypr]

Originally Posted by AnnArborBob

NeverInn, Thanks for the courtesy. However, using your approach seems to effectively turn your grey tank into a black tank as well, doesn't it? Am I missing something from your explanation? Using your approach how would you ensure that no black water gets into the grey tank when you "equalize" them?

NeverInn failed to mention step 3b. close gray tank valve. Then no mixing of tank water in gray tank,only in drain tubes.

[SilverEagle6]

My 2013 Flying Cloud 25 has the bathroom sink drain directly into the black tank. It was designed this way at the factory. I have been told by many that this is a design flaw, in actuality it is a significant benefit. When I discovered the situation, I called Airstream and in fact there seem to be many other AS's out there with the same feature. Just turn on your bathroom sink and listen...if you hear it draining behind your toilet, chances are it drains into your black tank. If in doubt, call them with your vin.

[SYC2Vette]

Ran across this old-ish post, but we ran into this same situation (grey water filling up and black at only 20%). Going to add a shut-off to the shower head, but as others pointed out, easy enough to wash dishes in a tub and dump rinse water down the toilet, and/or drain grey into bucket and do the same. Really don't see the need to do anything more elaborate personally. This and watching water use, gave us an extra 2 days (not going over 85% black water level).

[SuperTrouper]

Originally Posted by NeverInn

Washing dishes is another way a large amount of water is used. If you carry two plastic dish tubs and wash dishes like tenters do, you will conserve water and grey water tank space.

We do fine for a week using a tub for the dishes and pour into the toilet. We also try to use camp showers when available. If not available, showers are short and focused affairs. Water on, get wet, water off, lather, water on, rinse water off. We also have an Oxygenics water saver head https://www.amazon.com/Oxygenics-26481-Brushed-Nickel-Shower/dp/B00AZOWSJM/ref=asc_df_B00AZOWSJM/?tag=hyprod-20&linkCode=df0&hvadid=242024228564&hvpos=1o2&hvne tw=g&hvrand=3913760817581505772&hvpone=&hvptwo=&hv qmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9031944& hvtargid=aud-829758849484la-497028248351&psc=1that uses a venturi effect to increase shower pressure while reducing flow.

[Foiled Again]

Or when you shower put the shower drain in. Cut the top off of a one gallon milk bottle, leaving the handle intact. Bail the standing shower water into the toilet and flush. When water in the shower is less than 2 inches deep, pull the drain plug.

[uncle_bob]

Hi

We normally run about equal on black and gray water. If we get stingy it's not impossible to go for two weeks on a tank of fresh water .... A week to 10 days is pretty normal.

Bob