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Old 08-20-2013, 05:49 PM   #11
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My 320 was built in March of this year and the black water handle is in the water bay compartment. The one all the way forward is the gray water and the one just behind it is the black water. The galley gray water is next to the main dump value.

Bob
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Old 08-20-2013, 05:54 PM   #12
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If you have a sealed under belly and the handles are not color coded simply go to the dump station, put on a clear elbow and pull the handles and "see" what comes out, then just make some labels and label them.
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Old 08-21-2013, 09:51 AM   #13
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Have a 2013 320rs. Which valve is the black water tank (the waste water or the sewer water valve). Have had this unit for 8 months and still cannot figure it out. Boy oh boy.
If your facing the water compartment you see two handles for cable actuated dump valves (I could be wrong about the type of valves). Directly behind these handles are two side by side tanks. The closest (Port) tank is the Black Tank and the Handle Control is the right most one (closest to the Stern). The far tank (starboard) is a Grey Tank and the Handle Control is the left most (closest to the Bow) for bathroom sink and shower by themselves. The Handle located under the unit next to the 3" dump pipe / hose attachment point is a straight rod controlled valve that is a Grey Tank for the kitchen sink (galley) and washing machine by themselves. This tank is located to the right of that valve and spans across the 320RS. (BTW there is a "Galley" label in my water compartment but that is incorrect). The rear most (Stern) tank is the fresh water tank and spans across the 320RS. When the kitchen / washer Grey tank is full water rise in the kitchen sink. When the shower bathroom sink Grey tank is full water will rise in the shower. I have been looking for the leak source that is soaking the insulation under fresh water tank. And it is NOT from filling these tanks full.

I've read you should keep the Black Tank Valve closed until 3/4 full as indicated by testing the level inside the control control box. It may be a good idea the keep grey valves closed to until ready to dump prevent sewer gases from entering the grey tanks.
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Old 08-21-2013, 10:21 AM   #14
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Get a clear elbow - I have a 45 degree connector from Amazon.

Next time you dump, if you are still not sure but think you know which is which, try this.
Empty both tanks. Close the one you think is grey water. Have someone else flush. If water goes through the elbow, you got it right.

I was certain I knew which was which until after my first trip. I always put a few gallons in each tank to oscillate on the way home then empty into a bucket. I can then pour right it into the service cap on my septic tank.

The difference between grey and black it really obvious when you can see it. I have black tape on the black tank handle now.

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Old 08-21-2013, 10:28 AM   #15
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Originally Posted by bclantz View Post
My 320 was built in March of this year and the black water handle is in the bay compartment. The one all the way forward is the gray water and the one just behind it is the black water. The galley gray water is next to the main dump value.

Bob
This sounds correct on a 320. My 295 all 3 handles are in the convenience center with the black tank valve on the far right of the 3
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Old 08-21-2013, 10:40 AM   #16
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How do I know when the black and grey water valves are open, do you pull to open and push to close them, water is backing into shower area.
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Old 08-21-2013, 10:44 AM   #17
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How do I know when the black and grey water valves are open, do you pull to open and push to close them, water is backing into shower area.
Pull open push close correct.
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Old 08-21-2013, 10:44 AM   #18
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Pull to open push to close
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Old 08-21-2013, 10:45 AM   #19
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How do I know when the black and grey water valves are open, do you pull to open and push to close them, water is backing into shower area.
Yes.
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