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Old 10-18-2014, 08:53 PM   #1
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2 separate grey tanks hookup

Wasn't sure where to post this, so I put it here. We just purchased a 2015 Rockwood Emerald 2904SS which has a separate galley and a bath grey tank. The main sewer valve is in front of the axles and the galley valve is about 10 feet away from the main valve and behind the axles.
My question is what is the best way to handle dumping for;

1. Full hookup - use a "Y" and carry 3 hoses? If so, how to maintain maintaining an elevation slope for all 3 hoses ? Or is there a better solution?

2. Emptying at a dump station - use one hose and move from tank to tank while the guy behind you has a conniption fit ?

I'm very used to one dump valve and after only 2 outings the second tank semms to be a pain in the butt! Any suggestions?

Thanks!
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Old 10-18-2014, 09:06 PM   #2
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We do number 1 if staying for a week or more, but typically I just leave the house on the connection for the shower and move it to the other connection if needed.
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Old 10-18-2014, 09:10 PM   #3
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You could replumb the two gray and the black together to one outlet.

Four inch vinyl rain gutter makes a good hose support if you do not wish to mess with the drain pipe.
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Old 10-19-2014, 10:40 AM   #4
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Thanks guys.
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Old 10-19-2014, 10:45 AM   #5
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you won't fill the kitchen grey tank as fast as bath. Just hook to it and drain at end of trip or when necessary.
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Old 10-19-2014, 07:32 PM   #6
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Had a similar setup on my last 5th wheel. Used 3 hoses, 2 twist on shut off valves and a Y connection. When connected to sewer, just leave the galley tank valves open all the time. Dump the shower gray after the black tank is done to flush out the hose.
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Old 10-19-2014, 07:42 PM   #7
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Quote:
Originally Posted by davel1971 View Post
you won't fill the kitchen grey tank as fast as bath. Just hook to it and drain at end of trip or when necessary.
X2!
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Old 10-19-2014, 08:13 PM   #8
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Quote:
Originally Posted by dpowli View Post
Wasn't sure where to post this, so I put it here. We just purchased a 2015 Rockwood Emerald 2904SS which has a separate galley and a bath grey tank. The main sewer valve is in front of the axles and the galley valve is about 10 feet away from the main valve and behind the axles.
My question is what is the best way to handle dumping for;

1. Full hookup - use a "Y" and carry 3 hoses? If so, how to maintain maintaining an elevation slope for all 3 hoses ? Or is there a better solution?

2. Emptying at a dump station - use one hose and move from tank to tank while the guy behind you has a conniption fit ?

I'm very used to one dump valve and after only 2 outings the second tank semms to be a pain in the butt! Any suggestions?

Thanks!


No need to modify...I have 2 gray tanks..I actually love it...great for short stays..for full hook up all you need is an extra piece of hose..a female to female converter for your hose..replace galley cap with one that has a hose connection..connect hose to elbow that goes into sewer Click image for larger version

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Old 10-19-2014, 08:18 PM   #9
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I use a garden hose (modified) to drain the galley tank. A "Y" to join the two black tanks and a short hose to connect the "Y" to the sewer drain connection. If you concerned about the elevation, I have used modified sections of gutter drains supported by blocks of wood.
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Old 10-19-2014, 08:19 PM   #10
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Harpman you stole my thunder.
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