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06-19-2022, 10:09 AM
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#1
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Established Member
Join Date: Mar 2022
Location: Jaffrey
Posts: 16
M.O.C. #30722
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Sewer help
I have a 2019 3791. I am wondering why I would have about a cup full of sewer come out of the pipe when I take the cap off to connect. All the valves are closed and the black tank was flushed really well.
I am wonder how the sewer could still be in the pipe and what I can do to stop it.
Is this a problem with the black tank valve.
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06-19-2022, 10:24 AM
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#2
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Montana Master
Join Date: May 2019
Location: Alton
Posts: 2,898
M.O.C. #24086
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This is just left over in the pipe after you dump. When you drive down the road it finds its way to the cap to SURPRISE you when you take the cap off.
Buy a Valterra twist on waste valve. This helps prevent surprises
https://www.walmart.com/ip/Valterra-...Valve/55356052
__________________
Daryl and Marianne,
2019 3130re 20th Anniversary Edition
2016 F350 Lariat
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06-19-2022, 10:37 AM
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#3
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Established Member
Join Date: Mar 2022
Location: Jaffrey
Posts: 16
M.O.C. #30722
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Quote:
Originally Posted by Daryles
This is just left over in the pipe after you dump. When you drive down the road it finds its way to the cap to SURPRISE you when you take the cap off.
Buy a Valterra twist on waste valve. This helps prevent surprises
https://www.walmart.com/ip/Valterra-...Valve/55356052
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Thanks for the info. I though it might be a valve problem. I figured since I had rinsed it out really well the pipe should have been clean.
I will try that valve.
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06-19-2022, 10:38 AM
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#4
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,696
M.O.C. #4831
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What Daryles wrote ^^^^^^^ The best thing for avoiding SURPRISES and a backstop against a (gonna happen sometime) leaky valve.
__________________
Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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06-19-2022, 07:58 PM
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#5
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Montana Fan
Join Date: Apr 2021
Location: everywhere, USA
Posts: 300
M.O.C. #28634
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twist on valve on the end is the ticket
I did exactly that when I had the same thing happen to me with our new Montana. I was new to the process and needless to say it was a real surprise for me! No problems since!
__________________
2021 Montana 3761FL, 11.5kw LIFPO4 batteries & 1700 watts of panels w/ Multiplus II 3K inverter and 30amp DC to DC charger from truck. 8k Dexter axles w/ Kodiak disc brakes.
2019 6.7 diesel F350 DRW with Banks derringer and 4"exhaust, airlift bags, 25k B & W Companion hitch, 45 gal. aux. diesel tank and 14k Winch, just in case!
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06-20-2022, 04:48 AM
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#6
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Montana Master
Join Date: Oct 2019
Location: Jacksonville
Posts: 2,237
M.O.C. #25165
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I also have a 2019 3791RD. One thing I do every now and then when dumping/flushing tanks is to run the nose up high and drain the black and shower gray tanks, then run the nose down low and drain the galley gray tank. The way they are installed and plumbed, the black and shower gray tanks empty to the rear and the galley gray empties to the front. This helps get everything out of the tanks.
The twist on Valterra valve mentioned above is a "must have" too.
__________________
Robert & Diana McNeal
2019 Montana Legacy 3791RD 20th Anniversary Edition
2014 F350 4x4 6.7L SRW
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06-29-2022, 01:05 PM
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#7
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Montana Fan
Join Date: Sep 2018
Location: Reno
Posts: 293
M.O.C. #22620
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I use a Valterra cap and carry a plastic pail to catch the waste. Sometimes it's grey water, sometimes it's black and sometimes it's a little of both and sometimes it's nothing. I then dump it down the sewer before I connect my dump hose.
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06-29-2022, 01:22 PM
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#8
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Montana Master
Join Date: Jun 2017
Location: Northern Illinois
Posts: 525
M.O.C. #19994
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Agree with Daryles and Carl and Susan
__________________
The "Black Pearl"-2017 3731FL Legacy Package
2017 F-450 Platinum, 6.7 PSD
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06-29-2022, 01:43 PM
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#9
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Seasoned Camper
Join Date: May 2020
Location: Chandler
Posts: 81
M.O.C. #26281
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I just a flow meter and clear dump fitting to fill the black tank and flush it several times when done with a trip. I keep filling and dumping until the water is clear. I typically put 35-40 gallons in each time via the power flush. This way there are no surprises when I open the cap later.
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AZMont
2020 Ram 3500 MegaCab HO Diesel 4x4 SRW
2015 3100 RL, Onan 4500i inverter/generator
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06-29-2022, 01:52 PM
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#10
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Montana Fan
Join Date: Jun 2018
Location: Jacksonville
Posts: 384
M.O.C. #21993
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And it may save you a trip to the ER when you remove the cap without a Valterra and you jump back, hit your head on the slide, trip over the hose, fall on the pedestal, dislocate your shoulder and wake up with DW saying what the #$%^ did you do. Not that that ever happened to me, was a friend, really.
__________________
I was once intelligent beyond my years. Now, I’m years beyond my intelligence.
2020 Montana 3561 Legacy, everything except paint.
2018 Silverado 3500 DRW, 50Gal Transfer Flow, Andersen hitch.
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06-29-2022, 05:23 PM
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#11
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Montana Master
Join Date: Oct 2018
Location: Anderson
Posts: 2,790
M.O.C. #22835
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Quote:
Originally Posted by AZMont
I just a flow meter and clear dump fitting to fill the black tank and flush it several times when done with a trip. I keep filling and dumping until the water is clear. I typically put 35-40 gallons in each time via the power flush. This way there are no surprises when I open the cap later.
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Rather than pumping 35-40 gallons into the black tank, why not use that Valterra, or a Flush King and back flush 35-40 gallons of gray water into the black tank, rinsing it out? Then as a final rinse, you can flush maybe.... a gallon ... of fresh water. I've been doing the back flush method absolutely every time I dump for over 20 years now, on 4 different campers.
I back flush at least, at a bare minimum, at least once. Sometimes 3 or more times, depending on how full the gray tank is. It saves water, it gives your gray water a second purpose, and it's very efficient at flushing out your black tank. In our environmentally conscious world we live in, it's a great way to re-purpose and save water.
__________________
History is not about the past, it's an explanation of the present.
2019 Montana High Country 375FL
2014 Chevy Silverado Duramax, 6.6L Dually
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06-29-2022, 11:31 PM
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#12
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Montana Master
Join Date: Dec 2021
Location: Northeast TX
Posts: 1,016
M.O.C. #30262
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Quote:
Originally Posted by GreG L.
And it may save you a trip to the ER when you remove the cap without a Valterra and you jump back, hit your head on the slide, trip over the hose, fall on the pedestal, dislocate your shoulder and wake up with DW saying what the #$%^ did you do. Not that that ever happened to me, was a friend, really.
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I KNOW that wasn't funny, but could not help but roar laughing! I could just imagine that happening to me! And trust me, my DW would have said the same exact words.
__________________
Lee, Edith, Lil' Bit & Cuddles
22 MHC 331RL, Surge Guard 35550, SumoSprings, Kodiak disc brakes, 412Ah Lithium, Gen 3 Goosebox, Sailun 85s
22 Ram 3500 CC DRW 6.7 CTD Herrin Hauler Classic Bed, 45 gal AUX tank
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06-29-2022, 11:35 PM
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#13
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Montana Master
Join Date: Dec 2021
Location: Northeast TX
Posts: 1,016
M.O.C. #30262
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Quote:
Originally Posted by DutchmenSport
I back flush at least, at a bare minimum, at least once. Sometimes 3 or more times, depending on how full the gray tank is. It saves water, it gives your gray water a second purpose, and it's very efficient at flushing out your black tank. In our environmentally conscious world we live in, it's a great way to re-purpose and save water.
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Dutchman - thanks to you and MOC members, this is exactly the procedure we have adopted to use and been very happy with the results.
OP -as several others have stated, the Valtera twist on gate valve is most definitely a must have add on.
__________________
Lee, Edith, Lil' Bit & Cuddles
22 MHC 331RL, Surge Guard 35550, SumoSprings, Kodiak disc brakes, 412Ah Lithium, Gen 3 Goosebox, Sailun 85s
22 Ram 3500 CC DRW 6.7 CTD Herrin Hauler Classic Bed, 45 gal AUX tank
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06-30-2022, 11:15 AM
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#14
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Montana Fan
Join Date: Jun 2020
Location: Liberty Hill
Posts: 139
M.O.C. #26548
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Exactly why I too put in a gate valve
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06-30-2022, 11:55 AM
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#15
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Montana Master
Join Date: May 2020
Location: UPLAND
Posts: 1,284
M.O.C. #26190
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When I dump, I raise the front of the rig which seems to help get everything out of the black tank. I also put one of these adapters on, which used in parallel with the factory valve, I get zero drips when uncapping and hooking up my black tank drain hose.
https://www.etrailer.com/RV-Waste-Va.../CAM39085.html
__________________
2019 Keystone Montana 3560RL, 2020 Chevy 2500 HD, Firestone airbags, Air Lift wireless compressor, Curt gooseneck, 20K Reese Goosebox, TST-507, USMC combat vet & retired LEO. Robert, Anika, Breanna, Dylan (daughter-in-law Stephanie). & our Great Pyrenees Layla
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06-30-2022, 12:23 PM
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#16
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Seasoned Camper
Join Date: Jan 2021
Location: Cumming
Posts: 84
M.O.C. #27901
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I have a Valtera Cap (T1020 with 3/4" cap) and just leave the cap off as we are traveling. No surprises.
__________________
2020 Ram 3500 CC, SWB, 4WD with Curt Q20 hitch 2021 High Country 331RL
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06-30-2022, 06:57 PM
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#17
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Montana Fan
Join Date: Aug 2019
Location: Monument
Posts: 114
M.O.C. #24683
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Except for the tailgaters behind you! Love it!
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06-30-2022, 07:35 PM
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#18
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Montana Master
Join Date: Jan 2018
Location: Granger TX
Posts: 2,599
M.O.C. #21044
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Not to worry! It’s all organic material right…PDF (poop drip fluid and poop exhaust filter) may be in our futures.
__________________
MikenDebbie Aggie ‘77 in the sticks near Austin TX
2019 Chevy 3500 High Country DRW
2018 Montana 3921FB
Aussie Gus + Texas Heeler Jimmy
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06-30-2022, 07:54 PM
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#19
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Seasoned Camper
Join Date: Jan 2021
Location: Cumming
Posts: 84
M.O.C. #27901
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Quote:
Originally Posted by BuckandTeresa
Except for the tailgaters behind you! Love it!
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I was wondering why I never had a problem with tailgaters!!
__________________
2020 Ram 3500 CC, SWB, 4WD with Curt Q20 hitch 2021 High Country 331RL
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06-30-2022, 08:07 PM
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#20
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Montana Fan
Join Date: Aug 2019
Location: Monument
Posts: 114
M.O.C. #24683
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Good one!
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