robertbick

Upstate NY

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My sensors do not read correctly on my galley tank which only holds grey water from the kitchen sink. My question is; If I overflow the tank, will it just back up into the kitchen sink or would it overflow somewhere else first and cause water damage somewhere in the fiver?
Bob
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nosticks

Tampa, Fl

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If plumbed properly, it will just back up in the sink.
NoSticks
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golf_bears

Rapid City, SD

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If your only source of water into the tank is the kitchen sink, then yes the full tank will back up into the kitchen sink. That is assuming all the drain pipe connections are good and tight. If they are not tight, particularly the P trap, the backup will leak out through the loose connections.
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robertbick

Upstate NY

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Thanks!!!
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medic 66

East of the Mississippi

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I had the same issue with the same tank on my 5'er. I got a bottle of "SENSOR CLEANER" which is actually what it was called from our local RV dealer/repair shop. You empty the tank, put 8 oz's in the tank, then totally fill it up 100% full and let it set for 24 hours. Drain it again and my problem was solved.
Kitchen sink soap scum and grease build up will affect those.
RC
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LadyRVer

Florida

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When I had a unit with the galley tank, when possible, I would just leave that one open and close it only when I drained the other two tanks. Agree with it backing up in the kitchen sink if all other components are working.
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robertbick

Upstate NY

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I just noticed that the vent is under the sink so I assume that if the tank overflowed, it would overflow right here under the sink. Is this correct? It seems to me that water would back up out of here before backing up into the sink unless these vents have some kind of valve that lets air in but not water out. Any tips?
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boiledcrabs

louisiana

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Maybe there's a check valve in the vent.
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robertbick

Upstate NY

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boiledcrabs wrote: Maybe there's a check valve in the vent.
That's what I would like to know.
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jrc55

Georgia

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robertbick wrote: boiledcrabs wrote: Maybe there's a check valve in the vent.
That's what I would like to know.
There is, it is designed to go down to let air enter not up which would let odors or worse yet water.
If it ain't broke, the government will keep trying to fix it until it is.
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