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Old 12-06-2017, 11:58 AM   #15
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I know it is plumbed that way on 2013 25rb.
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Old 12-06-2017, 12:23 PM   #16
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Never thought about it, but now wondering of my bathroom sink in my Classic 30 drains into the black tank...
Easy enough to find out...
Run water and see which tank fills...
Not an issue really, but now I'm curious.
From the 2013 Classic owner's manual:

The wastewater from the sink, shower,
bath and lavatory drains into the AUXILIARY
HOLDING TANK.
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Old 12-06-2017, 05:02 PM   #17
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And if you clean your behind in the shower?
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Old 12-06-2017, 05:57 PM   #18
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And if you clean your behind in the shower?


See the gory details in post #5 above
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Old 12-07-2017, 04:24 AM   #19
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Never thought about it, but now wondering of my bathroom sink in my Classic 30 drains into the black tank...
Easy enough to find out...
Run water and see which tank fills...
Not an issue really, but now I'm curious.
This is exactly what we did. Our 2017 27FB bathroom sink drains into the grey water tank.

Larry
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Old 12-07-2017, 11:49 AM   #20
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The intent of my original post was to alert AS owners who were not aware, as I was, that the bath sink on some AS units may be plumbed into the black water tank (Despite what their owner's manual says) AND using said sink under given conditions could cause individuals (children for example) to be unknowingly exposed to pathogens. I believe we all can agree this should be avoided.

If there is a simple piping fix or at least a accurate disclosure in the owner's manual, or even a "Oh by-the-way" from the dealer, then why not do it?
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Old 12-07-2017, 12:11 PM   #21
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All the sinks in your house are plumbed to sewer, yes the sink shares the same pipes as the toilet.... unless you have a grey water system that is.
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Old 12-07-2017, 12:51 PM   #22
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Let’s remember that the addition of grey tanks was legislated into existence to begin with the 1972/3 model year expressly to avoid contamination.

I’ve no problem with the bath sink draining into the black tank to preserve grey tank capacity — as it’s not my kitchen sink — use is differentiated where it matters most.

Flip a coin, or sanitize the bath sink & plumbing with some water & bleach to fill. The majority of trailer drain plumbing is also “dirty”, just not in the same way, and might also benefit.

.
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Old 12-07-2017, 01:30 PM   #23
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All the sinks in your house are plumbed to sewer, yes the sink shares the same pipes as the toilet.... unless you have a grey water system that is.
Best response yes.

I guess all builders should be warning their home buyers of the potential safety issue.
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Old 12-07-2017, 02:07 PM   #24
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You are starting to tilt at windmills here.

It makes no difference where the gray water goes it all ends up in the campground sewer system. The number of individuals that will open a continues water flow into a closed system will only do it once.

We commonly put kitchen sink water, via a dish tray, into the toilet while camping without sewer to keep the gray tank from filling. I have re-plumbed the tanks on several trailers, housing kids, that had abnormally small holding tanks to insure they would make it through a 3 day weekend.

Lastly. If my gray tank does fill before we are scheduled to leave I will leave the drain cap on and open the gray tank valve than the black tank valve and count to 15, close the black tank valve and then the gray tank valve. That generally gets us another day or 2.
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Old 12-07-2017, 05:34 PM   #25
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the best solution would be to have an option to where the sink drains.
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Old 12-07-2017, 06:36 PM   #26
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When we bought our 17 30 FC I noticed first time out that I could hear water draining directly into the black water tank, realized it was inconsistent with the generic manual, but not a bad thing with the limited grey water capacity. I agree a backflow preventer is not necessary. When we are out in cold weather I put some extra water in the on-board tank and remove the hose from the trailer and crack it open at the post so water drains out of the hose and away from the fitting. Never had a problem and we have been in some pretty cold conditions. I suspect the bath sinks drains into the black water tank because it was easier/cheaper to run it there.....I doubt they were trying to address sanitation or capacity issue, just save some plumbing costs.
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Old 12-08-2017, 09:22 AM   #27
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Quote:
Originally Posted by AlinCal View Post
All the sinks in your house are plumbed to sewer, yes the sink shares the same pipes as the toilet.... unless you have a grey water system that is.
Quote:
Originally Posted by HeadWest View Post
I guess all builders should be warning their home buyers of the potential safety issue.
But what you're ignoring is that the sinks and toilets in homes do not drain into a relatively small tank inside the home that has its drain capped such that under normal conditions it can fill, and then overfill, potentially filling the sink with icky black water. If you inadvertently leave the bathroom sink faucet running at home, you're not going to wake up the next day to a bathroom filled with water contaminated with pee and poop.

Airstream's manual is wrong, and that is the issue. If they provided an owner's manual that did not explicitly contradict the actual working of the trailer's plumbing systems, then there would be no reason for anyone to complain. But they don't, and that's inexcusable.

Jim
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Old 12-08-2017, 09:36 AM   #28
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True to some degree, sewer lines can and do back up in some cases...but using an RV of any kind takes some knowledge of the systems or lots of things can happen.
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