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Old 09-18-2018, 06:53 AM   #1
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Two Grey Tanks?

we just took our first journey in our 2011 Keystone Outback 32' travel trailer we bought used. I have MANY questions but i'll start with this one....
on the tank monitor pad there are indicators for "grey tank 1" and "grey tank 2". I only see drains for black tank and just one grey tank drain. after draining and flushing black and grey tanks (to the point where drainage water is nearly clear) I still have indicators that read 1/3 for grey tank 1 and 2/3 for grey tank 2 (black tank is "E").

question....why 2 grey tank indicators?
and why are the indicator lights still reading 1/3 and 2/3 full
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Old 09-18-2018, 06:57 AM   #2
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Quote:
Originally Posted by graydond View Post
we just took our first journey in our 2011 Keystone Outback 32' travel trailer we bought used. I have MANY questions but i'll start with this one....
on the tank monitor pad there are indicators for "grey tank 1" and "grey tank 2". I only see drains for black tank and just one grey tank drain. after draining and flushing black and grey tanks (to the point where drainage water is nearly clear) I still have indicators that read 1/3 for grey tank 1 and 2/3 for grey tank 2 (black tank is "E").

question....why 2 grey tank indicators?
Is there a T Handle underneath the slide? I have 2 gray tanks but didn't know until I found the other T Handle on the frame below the slide. Its hidden a little bit
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Old 09-18-2018, 07:08 AM   #3
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look at the main drain pipe where you attach the sewer hose. now follow the main drain pipe, probably the 3" black tank drain, up. you are looking for tees where the drain pipes from the other tanks attach to the main drain pipe. how many other pipes join the main drain? each will come from a separate tank.

also look to see if you have a second sewer hose attachment somewhere else. from this little exercise you will be able to tell how many tanks are being drained. each tank will have its own t-handle to open and close the valve for that tank.
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Old 09-18-2018, 08:21 AM   #4
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Found it!

there was another "t" handle tucked way up near the spring shackle forward of the black tank drain. must be they "y" up above. The forward grey tank drain is for the sink drainage only and the one the shares the black drain is for the bathroom shower/sink.

thanks for the suggestion!
i'm starting to learn.....
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