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Old 05-25-2014, 06:18 PM   #15
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I think you are best to leave your grey water tank open to the sewer for most of your stay and leave your black water valve close. No doubt you could leave the black water valve loses for several weeks without any problem. The more liquid you get in there, the better.

That way, you are free to use as much water as you like during your stay to wash dishes, have showers etc. without having a backup in your shower.

Then, about a day before you plan to leave, close the grey gave as well in order to accumulate quite a bit of grey water which you will use to flush your sewer hose.

Now, when are are ready to leave and want to dump the tanks, dump the black tank first.

Then, dump the grey tank so that you will be using the the grey water to rinse the sewer hose.

Most dump stations have a non-potable water supply hose and so you can unhook your sewer hose from the trailer and give it a final clean water rinse before storing it.

That is the way we have always done it.

Brian.

PS - if your trailer is equipped with a black water water rinse hose connection, then close your black water tank after dumping the initial "load" give it a good shot with the rinse hose, then dump the accumulate rinse water from the black tank before you open the grey water valve to dump the grey water.


Hope all that makes sense!
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Old 05-25-2014, 07:31 PM   #16
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Yes, it makes good sense.

Thanks.
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Old 05-25-2014, 10:02 PM   #17
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What .... was the gate not opening all the way was actually the disk of plastic left over from the original hole saw cutting and installation. It was partly propped against the black tank exit hole half way.
We found the "same" plastic disk 10 years after buying our 2002 19" Bambi. It had jammed up against the gate valve of the blackwater tank. Messy to remove, but things drained much better after it was gone!

Tim
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Old 05-26-2014, 12:06 AM   #18
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Quote:
Originally Posted by RVDreamer View Post
SO what is the proper procedure for opening the black water valve when at a campground?

Should you always leave the valve closed while parked at the hook up and only open and flush every couple of days? or Should you leave the valve constantly open while parked and just use lots of water when flushi

I would think that only dumping every couple of days along with flushing of tank would be the proper procedure.
You have it exactly right! Get a couple days off waste accumulate and then dump it.. It will dry out if you do not have enough water...

As for at campground I would say the worst thing is the only thing. Close the gate and prepare for the worst. You are probably going to need a kiddie pool and a hanger or stout write to feed up the drain as you crack the black gate and try to open whatever is blocking.

Best of luck to you.
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Old 05-26-2014, 12:10 AM   #19
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If it might be possible to fish a tutting garden hose through the open gate, that might work pretty well,

You know hydraulic mining...
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Old 05-26-2014, 12:53 AM   #20
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There are fittings that go on the drain that will let you send water back up the input, thus flushing from the output. I use that feature in my Sewer Solution as well as the black tank sprayer that is built in, and alternate the sprayer and backfill until I am happy with the result. I have a 6 inch extension on the output that is clear so I can "enjoy" (or monitor) the results of my skills at black tank flush.

The SS has changed my attitude though: no more big stinky slinky, the small hoses and water-flow maceration make this task tolerable.
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Old 05-26-2014, 09:02 AM   #21
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Never, ever leave the black valve open when parked; I keep both tanks closed when parked. Use the toilet as needed and add plenty of water to flush. When it gets full or when ready to leave, I have the wife flush water while I pull the valve. After the black tank is drained and I hear just the water trickling down, I close off the black valve. I then dump the grey water as it will "clean" the remaining black water out of the hose. Everyone has their favorite poop chemical, but I have found TST Orange by Camco to work better than anything I have used before.
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Old 05-26-2014, 09:52 AM   #22
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Gray always fills faster than black...a simple and good way to keep the black tank in sync with gray and a bit more "fluid" is to use a small tub or other container in the sink to wash dishes in, then dump the soapy dish water thru the toilet (carefully checking for the odd piece of silverware at the bottom of the soapy tub water). Having at least half a tank full for either adds a little bit a gravity to improve the flow and the gray water diversion to the black tank reduces the ratio of solids to flush when dumping. The fuller the tank, the more gravity works in your favor. —Al
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Old 05-26-2014, 02:09 PM   #23
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We try not to use the trailer toilet for #2 anymore than absolutely necessary and try no to put much TP down there. Airstream tanks are really shallow which makes them more likely to get clogged and less likely to flush everything out. Never hurts to look down the toilet after dumping to make sure there is nothing left. You can always run some water from the fresh water tank to help rinse stuff out when you are dumping. This is assuming there is not a line behind you at the dump station.

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Old 05-26-2014, 02:42 PM   #24
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Help! My husband and I are full timers, and recently we have found that when ever we go to dump our black tank, little comes out, and there is standing water in the toilet still.
I have the same model and year, with a rear bathroom. When I open the "trunk", there are the two vertical rods to open and empty the two tanks, and between them, there is a a large vertical pipe with a black cap on it, which the Owner's Manual calls "a convenient fitting for flushing the holding tank". It has an opening with a screw-on cap.

I have never had this off, but it is meant to be an aid to clearing problems such as what you are experiencing now.

If it is hardened human waste, time will help soften it, and a couple of bags of ice cubes poured down the toilet quickly followed by a say, ten-mile drive will help speed up the process enormously.

By the way, human waste is only one of many things that finds its way into you black tank: combs, brushes, toys, and really anything that can fit down the toilet opening have been documented here. :/ Such items are not affected by ice cubes, or driving around. Get a mirror with a handle (that will pass through the toilet opening), a pair of rubber gloves, and go "fishing".

Don't give up!
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Old 05-26-2014, 05:29 PM   #25
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SO what is the proper procedure for opening the black water valve when at a campground?

Should you always leave the valve closed while parked at the hook up and only open and flush every couple of days? or Should you leave the valve constantly open while parked and just use lots of water when flushing?

It seems like the smell from the sewer hose connected to the dump station would vent through your toilet if you left the valve open continuously and that the black tank would dry out and possibly leave dry solids building up in the tank.

I would think that only dumping every couple of days along with flushing of tank would be the proper procedure.
Your #2 solution is correct for #2. Leaving the black valve open will let the liquids exit, while the solids turn into "the black hills". As a single camper I often go a week or longer without emptying the black tank, with a family, every 2-4 days is better. Of course it all depends on two factors, (1) size of the black tank (2) size of the contents thereof!

Paula
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Old 05-27-2014, 07:39 PM   #26
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Definitely if you are dumping every 3 days, unless you are adding additional water to fill the tank, you are potentially creating your issue. The lack of adequate liquid means you will be leaving some solid waste behind. Do this enough you will plug up that drain. My rule of thumb is that the toilet has to be 75% full before we dump. It is not unusual when departing a campground to be filing the toilet with what's left in the fresh water tank or the city water hookup prior to heading for a dump station. I've owned travel trailers since 1982 and have never experienced a clog. If you are concerned about odor with the extended holding time, add more toilet chemical. During hot weather it's not unusual for us to toss in more chemical on day 3 or 4.

Jack
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Old 05-27-2014, 10:07 PM   #27
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A newbie question, why does the gate valve have to be open to do the "clean water flush"? Wouldn't keeping it closed allow the clean water to really flush and fill the black tank until nearly full then pull the valve and let it all out clean it better?
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Old 05-27-2014, 10:42 PM   #28
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Black tank blockage!

You keep the black water valve closed until the tank is either full on use or you fill it just before dumping. Typically (if I'm at a full hookup site), I'll keep the grey water valve open. When it's time to dump the black tank, I'll close the valve on the grey and fill that tank. Once both tanks are full, I'll dump the black. Once that tank is empty, I'll close off the black valve and then open the grey valve. That will flush the hose and the area around the hose connection.

If I have ample water, I may dump the black tank, close the valve and add more water to the toilet and try to fill the tank. Once I get the desired amount (about 50%), I'll reopen the valve to the black tank. Usually any residual should flow out. I close the black valve and open the grey which will clean the hose.

Now my Classic has the rinse valve and I typically use that on my last camp out of the year. When using that I leave the black water valve open. There is a label next to the connection that says to keep the black water valve open when using that flush system. One reason would be preventing an overflow situation which I think has happened to one of the members on the forum. The other reason is the fact that that flush fitting does produce a spray in the tank. If the black water valve is left open, the spray can better clean the tank since it doesnt get blocked by standing water.

Jack
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