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01-08-2016, 06:40 AM
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#1
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Junior Member
Join Date: Feb 2015
Location: Hopewell,IL
Posts: 24
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Black tank difference from C class to A class
Previously we had a Four Winds 28ft C class. Whenever we camped at a full hookup site, I opened the tanks and left them that way without an issue. Now with my Forest River 34ft A class, my black tank seems to be backing up with this process. Are the tanks built differently between class types? Should I keep the valves closed and dump it on intervals? Daily or wait for the inaccurate gauge to tell me it's full? I'm on a 3 month snowbird sit, so I need to figure this out. Please share your system with me.
Thanks.
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01-08-2016, 06:52 AM
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#2
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Senior Member
Join Date: Oct 2011
Posts: 3,362
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I leave black tank closed. Gray tank open. Have my smart phone send a message every 6 days to dump black tank. We are setting in same place for 4 months.
__________________
2004 Endura 6340D SOLD
2012 Chevy Captiva toad SOLD
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01-08-2016, 06:58 AM
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#3
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Senior Member
Join Date: Nov 2013
Posts: 5,782
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You can leave the grey open but leave the black closed. When the black is nearing time to dump, close the grey and allow it to fill as well so that after dumping the black you can use the grey water to wash out the hose.
Not sure how you got away with that in your Class C, you may have just got lucky. Also, RV geeks has a great video on dumping the tanks.
__________________
2015 Tiffin Phaeton 40QBH
2018 Chevrolet Colorado Toad
Roadmaster Tow Setup
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01-08-2016, 07:09 AM
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#4
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Junior Member
Join Date: Feb 2015
Location: Hopewell,IL
Posts: 24
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This unit has a tank flusher. Can I just attach that whenever I dump and clean out the tank and hose at the same time?
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01-08-2016, 07:16 AM
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#5
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Senior Member
Join Date: Jul 2010
Posts: 5,337
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As others have said, leave the black closed until mostly full. Once you dump the black tank, then yes you can attach a hose and flush the tank, but don't count on everything getting flushed out. Close the valve and add a few gallons of water to make sure things stay wet.
__________________
Tom
2016 Newmar Bay Star Sport 3004
2021 Jeep Gladiator Sport Willys
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01-08-2016, 07:16 AM
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#6
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Senior Member
Join Date: Sep 2012
Posts: 8,055
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There are a lot of things one can do that are also things one should not do as there may be repercussions.
In the case of the tank flusher set it up with a vacuum breaker in the line or you may be drinking your own effluent. It may already have one as many places now require them. Also set it up in a way that lets you observe the amount the tank is filled and what is coming out
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01-08-2016, 07:23 AM
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#7
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Senior Member
Join Date: Oct 2014
Location: Port Orchard, WA
Posts: 4,217
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Can't speak to your experience with the Class C, but the problem with leaving the black tank open all the time is that the liquids in the tank outrun the solids out the drain, leaving the solids to "pile up" under the toilet inlet. They will also dry out and harden.
ALSO any tank sanitizer you may add to the tank to control smell will ALSO leave the tank with the liquids. Result is Mt. Everest under your toilet. A good way to clean that up is to add about 5 bags of ice to the tank through the toilet, add some water, and go driving. The ice will batter the mountain slowly to pieces, and after melting will help to wash away the remaining mess.
__________________
Scot & Laura Kellersberger, U.S. Army (ret)
Newmar 4 wheel drive Dutch Star 3891, SOLD
Now RV'ing on the water in a Trawler!
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01-08-2016, 08:32 AM
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#8
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Senior Member
Winnebago Owners Club
Join Date: Dec 2015
Location: Jacksonville, Fl
Posts: 3,542
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Quote:
Originally Posted by Hit_the_Rhod
... A good way to clean that up is to add about 5 bags of ice to the tank through the toilet, add some water, and go driving. The ice will batter the mountain slowly to pieces, and after melting will help to wash away the remaining mess.
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VERY clever, thanks for that.
That's one of those ridiculously simple answers, that I would never have thought of.
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01-09-2016, 06:57 AM
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#9
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Senior Member
Join Date: Oct 2014
Location: Port Orchard, WA
Posts: 4,217
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Quote:
Originally Posted by Podivin
VERY clever, thanks for that.
That's one of those ridiculously simple answers, that I would never have thought of.
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Much though I'd like to take credit for it, I was actually told this by another RV'er! Take care and enjoy the ride.
__________________
Scot & Laura Kellersberger, U.S. Army (ret)
Newmar 4 wheel drive Dutch Star 3891, SOLD
Now RV'ing on the water in a Trawler!
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01-11-2016, 08:56 PM
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#10
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Senior Member
Join Date: Sep 2012
Posts: 8,055
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FWIW my observation with C's is that they use a wide flat shallow tank to sit inside the floor wrap. Many of the A's seem to trend to boxier tanks between the rails and with a heated basement compartment. Among other things the wide shallow tank will build up faster if the unit lays so there is a down hill slant away from the toilet while with a slight uphill slant it will maintain a puddle under the toilet helping the pile slide when dumped. OTOH if that pile slumps flatter and is allowed to dry out it will be more of a mess.
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01-11-2016, 09:24 PM
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#11
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Senior Member
Join Date: Nov 2014
Posts: 1,149
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Here is a website that might be helpful: www.allprowaterflow.com
Happy Camping!
__________________
06 Holiday Rambler 45' PBQ
USAF Vietnam Vet 68-72
A1E/A1H Skyraider "SandyHobo"
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01-13-2016, 10:52 AM
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#12
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Senior Member
Monaco Owners Club
Join Date: Jan 2004
Posts: 1,188
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Quote:
Originally Posted by Podivin
VERY clever, thanks for that.
That's one of those ridiculously simple answers, that I would never have thought of.
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Before you conclude that ice in the black tank solves the problem - you might want to check this out -->
Ice likely doesn't hurt (and it's certainly easier to dump ice down the tank when putting the coach into short term storage between trips). But as a method of getting the black tank clean ... maybe not so much. Just sayin' ....
__________________
SpaceNorman
2012 HR Endeavor 43' DFT, 2022 Jeep Wrangler
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01-13-2016, 11:18 AM
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#13
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Senior Member
Join Date: Feb 2015
Location: Grapevine, Tx
Posts: 5,635
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Quote:
Originally Posted by niceguy9605
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How much does that cost for a 40 gal black tank?
__________________
2004 Fleetwood Southwind 32VS W20 - SOLD!
ReadyBrute Elite towing a 2017 Ford Edge Sport
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01-13-2016, 11:22 AM
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#14
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Senior Member
Join Date: Jun 2015
Location: Chula Vista, Ca.
Posts: 538
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Quote:
Originally Posted by opnroad
Previously we had a Four Winds 28ft C class. Whenever we camped at a full hookup site, I opened the tanks and left them that way without an issue. Now with my Forest River 34ft A class, my black tank seems to be backing up with this process. Are the tanks built differently between class types? Should I keep the valves closed and dump it on intervals? Daily or wait for the inaccurate gauge to tell me it's full? I'm on a 3 month snowbird sit, so I need to figure this out. Please share your system with me.
Thanks.
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As others have pointed out, don't leave the black tank open, you're just building a poop pyramid. If you follow the techniques in this video you shouldn't have any issues:
Personally I don't leave the grey tank open when parked either. I let it fill up and drain it after the black tank is emptied.
Use a good waste enzyme in the tank and make sure there is always some fluid in the tank, it should help to get rid of the pyramid you've been building. I use this stuff and it seems to work pretty well. http://www.amazon.com/Walex-BIO-1153...words=bio+pack
What toilet paper you use can make a difference as well.
After this video came out we switched out our TP . . . . .
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