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Old 07-01-2015, 11:28 AM   #1
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Galley tank gray water valve location

Hi. New to the forum. My husband and I purchased a 2008 Jayco Seneca 36ms. We are on a trip right now having to work out a few kinks and new owner issues. An issue we are having is trying to find the location of the galley gray water tank dump valve handle. My husband has found both black water tank valve handles and the rear bathroom gray water valve handle He has looked all over the coach inside and out including the owners manual and couldn't find it. Currently the kitchen sink and half bath sink are full/ backed up with gray water. We've owned two other RVs before and never had trouble locating the dump valves but this one seems to be elusive. Any suggestions or pointers would be much appreciated.

Thank you!

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Old 07-01-2015, 12:36 PM   #2
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I love a good mechanical mystery.

The only solution here, I see, is to crawl under there with a flashlight and follow the plumbing.

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Old 07-01-2015, 04:03 PM   #3
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Not familiar with your vehicle but pg. 56 of 2008 Seneca owners manual says"
"Certain floor plans may also have the lavatory draining into the waste (black) tank."

Looking at the floor plan I would guess that the kitchen sink could drain into the front black tank.
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Old 07-01-2015, 06:24 PM   #4
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One quick way would be to dump all tanks with the valves you have and see if the galley grey changes.
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36ms, gray, seneca, valve, water

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