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04-28-2019, 01:41 PM
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#1
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Member
Join Date: May 2018
Posts: 90
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Water coming out of roof vent!
Ok...My husband was back-flushing the black tank when he noticed water coming off the roof from the roof vent. We also noticed more water come up into the toilet bowl. Not sure if it was water from the black or grey tank. It wasn’t much as he caught it when it happened. Should we have any concerns? Any advice is greatly appreciated!!!
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04-28-2019, 01:50 PM
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#2
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Site Team
Join Date: Oct 2014
Posts: 15,300
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You need to have the black tank dump valve open when you run the tank flush or you will fill the tank and force black water out of the roof vent. Shut off flush and connect to dump station and open black tank dump valve.
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2015 Freedom Express 248RBS
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04-28-2019, 02:26 PM
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#3
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Site Team
Join Date: Aug 2012
Location: top side land of Lincoln
Posts: 7,509
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Know a guy who totaled his camper flushing the black tank with the valve closed.
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2014 LaCrosse 323RST-TE-C
2009 Chevy 2500HD Z71
Seasonal
Zelda the campin dog
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04-28-2019, 02:52 PM
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#4
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Kanadian Kamper
Join Date: Sep 2010
Location: Southern Ontario
Posts: 8,185
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If you weren’t sure if the water was from your grey or black tank, the contents must have pretty clean. Back flushing the black tank is the tank that’s full of the yucky stuff.....from the toilet.
Make sure the valve is open when back flushing.
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Ken and Terry
2018 Sunseeker 2430S-CD, nicely modified and carried by a 2017 Ford E450 Sport
Former Georgetown 330TS owner for 10 years with more mods than I can count, pushed by our 2017 GMC Terrain
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04-28-2019, 02:54 PM
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#5
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Site Team
Join Date: Mar 2014
Location: Grayson County, Texas
Posts: 21,587
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... also if it's coming up in the toilet bowl, it ain't from the gray tank!
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2015 FR Wildcat 295RSX / GMC Sierra
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04-28-2019, 03:33 PM
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#6
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Senior Member
Join Date: May 2017
Posts: 387
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Warning Sticker
My Freedom Express has a decal above the tank flush connection that warns to keep black tank valve OPEN when tank flushing!
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04-29-2019, 12:11 AM
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#7
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Member
Join Date: May 2018
Posts: 90
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Quote:
Originally Posted by Platokidd
Know a guy who totaled his camper flushing the black tank with the valve closed.
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How did it total his camper? Please share. We’re definitely concerned.
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04-29-2019, 12:12 AM
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#8
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Member
Join Date: May 2018
Posts: 90
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Is there anything we need to check on the roof or at the roof vent? Anything we need to do to clean the roof vent? Thanks!!!
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04-29-2019, 05:45 AM
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#9
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Senior Member
Join Date: May 2017
Posts: 5,712
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When I use the tank flush, I'll close the valve...time about 1 minute and reopen valve. I'll do this a couple times, but I NEVER !!! leave. I won't walk away from that valve till I'm done.
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04-29-2019, 06:38 AM
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#10
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Senior Member
Join Date: May 2017
Posts: 158
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I flush the black tank with the valve closed but always use a flow gauge/totalizer. If you know the tank size, you know how much water you can put in before it'll ever become an issue. If you know how much you are putting in...no issue. $15...never flush without it.
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04-29-2019, 11:52 AM
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#11
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Member
Join Date: May 2018
Posts: 90
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Quote:
Originally Posted by hinkle_e
I flush the black tank with the valve closed but always use a flow gauge/totalizer. If you know the tank size, you know how much water you can put in before it'll ever become an issue. If you know how much you are putting in...no issue. $15...never flush without it.
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Where can we find one of these? Camping World??
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04-29-2019, 12:06 PM
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#12
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Senior Member
Join Date: May 2017
Posts: 158
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Amazon...many varieties. Most, if not all, are plastic so limit any lateral strain or youll break the threads. Just search for "garden hose totalizer" or 'garden hose flow meter"
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04-29-2019, 12:16 PM
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#13
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Senior Member
Join Date: Feb 2017
Location: SW Ohio
Posts: 1,694
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As long as there are no pluming issues, such as a hole on the vent pipe I can't see how there would be any issues.
Even if you use a flow meter, don't walk away.
I do like another poster mentioned and close it for a minute or 2, generally while the gray tank dumps then open it up, repeat if needed. Unless you have a very small black tank it will take awhile to fill. Also it is a sprayer and the goal is not to fill the tank, just get more water to carry stuff out better
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TV 2024 F350 DRW - on order
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04-29-2019, 12:19 PM
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#14
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Denver To Yuma In 90 Days
Join Date: Mar 2018
Location: Yuma, Arizona
Posts: 3,882
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Quote:
Originally Posted by plh869
Where can we find one of these? Camping World??
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I bought mine for $16 bucks from Walmart.com
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04-29-2019, 12:19 PM
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#15
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Senior Member
Join Date: Jul 2017
Location: Georgia
Posts: 581
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I have heard of this happening before.... Question,.... if overfilling, black tank would the sewage not back up at the toilet before it backs up thru vent pipe./
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04-29-2019, 12:24 PM
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#16
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Senior Member
Join Date: May 2017
Posts: 5,712
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Depending on the toilet...the seal will prevent sewage from filling the toilet and the next easiest route ?.....UP the vent pipe.
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04-29-2019, 12:34 PM
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#17
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Senior Member
Join Date: Feb 2017
Location: SW Ohio
Posts: 1,694
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If the toilet valve seal is good it shouldn't backup in the toilet. If you try to flush the toilet when the vent water level is almost to the roof expect a flood.
__________________
2024 Artic Fox 3018 5th Wheel
Grand Design 2800BH TT 2021 - for sale
Prior TT 2017 Flagstaff 831CLBSS Classic Ultra lite - SOLD 5/21
TV 2024 F350 DRW - on order
Prior TV 2017 F150 6.5' bed 3.5 Eco-boost Max tow 1800lbs payload
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04-29-2019, 12:43 PM
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#18
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Member
Join Date: May 2018
Posts: 90
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Quote:
Originally Posted by TheWolfPaq82
Depending on the toilet...the seal will prevent sewage from filling the toilet and the next easiest route ?.....UP the vent pipe.
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Some water did come up into the bowl but not a lot.
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04-29-2019, 12:45 PM
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#19
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Member
Join Date: May 2018
Posts: 90
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Quote:
Originally Posted by llr
As long as there are no pluming issues, such as a hole on the vent pipe I can't see how there would be any issues.
Even if you use a flow meter, don't walk away.
I do like another poster mentioned and close it for a minute or 2, generally while the gray tank dumps then open it up, repeat if needed. Unless you have a very small black tank it will take awhile to fill. Also it is a sprayer and the goal is not to fill the tank, just get more water to carry stuff out better
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Is the flow meter a sprayer? Sorry for my confusion.
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04-29-2019, 12:46 PM
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#20
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Senior Member
Join Date: Jun 2013
Location: CT
Posts: 307
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I left mine closed for too long one time, the blank tank expanded and bent the holding straps, I don't do that anymore...not sure how it built pressure other than maybe they have a valve in the vent that will allow air but not water/solids.
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2006 F250 6 speed
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