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Old 07-04-2018, 11:04 PM   #29
wmb
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2014 25' Flying Cloud
Springfield , New Jersey
Join Date: Feb 2018
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Quote:
Originally Posted by Ronman View Post
WMB,
I do not see your model / year posted. Please post. If I missed it, Im sorry.
This topic has me intrigued.
Thx,
Ron
It's a 2014 Flying Cloud 25
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Old 07-04-2018, 11:15 PM   #30
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2017 25' Flying Cloud
Waco , Texas
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One thing I do know, Airstream manuals are poorly written and often contain inaccurate information on my FC 25FB trailer. My electrical diagram is from 2007 despite many obvious changes, and my plumbing schematic from 2001 are both wrong for my specific model.

Thank God this Airstream Forums exist, or I would be lost making repairs and improvements to my AS.

Owners helping owners.
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Old 07-05-2018, 06:58 AM   #31
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2001 30' Excella
Somerset , New Jersey
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After reading this and many other (some lengthy) postings here on the forum I have learned a lot about many different Airstreams and, yes, even a little about my own. But one thing I have confirmed that relates to all of them.
We now know just where ASSUME ing anything will get us, eventually.
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Old 07-05-2018, 10:36 PM   #32
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2007 27' Safari FB SE
Rancho Murieta , California
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Thanks!
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Old 07-11-2018, 11:03 AM   #33
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2007 27' Safari FB SE
La Pine , Oregon
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I put a deposit on a 2018 27FB and it appears the bathroom sink drains into the black tank on that model (my 2007 Safari 27FB bathroom sink drains into the gray water tank). I was considering a 30 but after watching the Wandering Wagner's and their comment about their bathroom sink draining into the black water tank, I nixed that idea. It's absurd to me that they would drain the bathroom sink into the black water tank and not the gray water tank.
Draining the bathroom sink into the black tank is a major issue for me as, for example I'm at an RV park that doesn't have a sewer hookup at my site. The owner hauls a tote over here to empty my black tank, which lasts me almost a month. This setup with the bathroom sink emptying into the black tank would really put the kibosh on any long-term boondocking. I plan to move to property that doesn't have any sewer/septic for a few months and was going to purchase a tote so I could haul the contents to the sewer dump.
Emptying the bathroom sink into the black water tank is going to dramatically cut back on how long I can go without having to dump my tank, which causes me to reconsider going through with the purchase of the new trailer.
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Old 07-11-2018, 12:00 PM   #34
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1999 35' Cutter Bus Diesel Pusher
Bulahdelah , NSW Australia
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Common in quite a few motorhomes and fivers too
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Old 07-11-2018, 12:37 PM   #35
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2018 30' Classic
Belleville , Illinois
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If I am reading this diagram accurately the 18 Classic drains the lavatory into the

grey tank. Click image for larger version

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Old 07-11-2018, 12:46 PM   #36
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2018 25' Flying Cloud
2007 25' International CCD FB
2006 23' Safari SE
Cave Creek , Arizona
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If the galley and shower are on the same side the bathroom sink flows into the black tank. That is the way it is on my 2018 25RB FC.
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Old 07-11-2018, 01:23 PM   #37
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Villa Park , Alabama
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Instead of flipping through my manual for a vague answer, I just took 5 min. to go out and test it for myself.
Opened up the valves on my empty gray water tank, turned on the water pump and bathroom sink, and voila...out came the water.
On my 31' 1976 Sovereign International with a rear bathroom, the sink drains to the gray tank.
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Old 07-11-2018, 03:15 PM   #38
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2018 25' International
Juneau , Alaska
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I have a 2018 Int. RB and the bathroom sink drains into the black tank. We are currently are using a composting toilet so its not an issue.
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Old 07-11-2018, 03:38 PM   #39
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1996 25' Excella
Tillsonburg , Ontario
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I routinely dump my dish water tub down the toilet because as a single I don't fill the BW Tank as fast as the Grey. So for me, the bathroom sink into black water makes a lot of sense.
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Old 07-11-2018, 04:14 PM   #40
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2017 25' Flying Cloud
Waco , Texas
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Quote:
Originally Posted by Sophiehaus View Post
If the galley and shower are on the same side the bathroom sink flows into the black tank. That is the way it is on my 2018 25RB FC.
On my 2018 25FB FC, the bathroom sink definitely goes to grey tank. Confirmed.
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Old 07-11-2018, 11:34 PM   #41
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2018 30' Classic
Ivins , Utah
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Bathroom sink drains to the black tank? That was a surprise!

Quote:
Originally Posted by andyherman View Post
I put a deposit on a 2018 27FB and it appears the bathroom sink drains into the black tank on that model (my 2007 Safari 27FB bathroom sink drains into the gray water tank). I was considering a 30 but after watching the Wandering Wagner's and their comment about their bathroom sink draining into the black water tank, I nixed that idea. It's absurd to me that they would drain the bathroom sink into the black water tank and not the gray water tank.

There appears to be sufficient confusion on this topic, especially if there are reports that newer 27FBs are plumbed differently than older ones. Definitely my 2010 27FB lav drained to gray. Then again, Martee reports a 2018 25FB (with a virtually identical bed/bath floorplan as the 27FB) has a lav draining to gray.

Reading a couple threads on this topic, I am beginning to see a possible pattern... FB lavs draining to gray, RB lavs draining to black. But I wont take bets on where my 30 RB drains until I test it :-)

Perhaps a call to Jackson Center customer support is warranted in your case to get the straight scoop.
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Old 07-12-2018, 02:21 AM   #42
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2014 20' Flying Cloud
Long Island , New York
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You can't rely on any AS owner's manuals or schematics as gospel about where your particular bath sink drains.

Only the full-scale-model testing reported here will work definitively.

With an empty grey tank, and its drain valve open, pour water down the bath sink drain. If water comes out the grey drain, you have your answer. If not -- with the trailer very quiet, and no water pressure, hold the toilet flush stopper open, and pour water down the bath sink drain. You should hear it falling into the black tank [which should be empty-ish]. This must be done without running the pump because it is too noisy.

You can probably trust that the plumbing will not change configuration after this test, thus it need be done only once in the lifetime of your trailer.



PS -- If you can't perform the test above, these search results show other threads/posts on "sink drains into black tank" --

https://www.google.com/search?q=sink...=airforums.com
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