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11-12-2018, 02:55 PM
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#1
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Established Member
Join Date: Jun 2018
Location: Miami
Posts: 11
M.O.C. #21932
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Grey water backs up, won't drain till black drain open
Hi again all,
We've got a 2019 Montana 3731FL, and something seemingly odd is happening.
When we've taken a few showers, the shower drain stops draining, and water sits in the drainpan. BUT, when we pull the grey tank drain, the water doesn't drain out. Only after pulling the black tank drain does it go down. We even had it happen with the grey tank valve left open!
Any ideas why this might be happening?
Thanks in advance,
Rich
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11-12-2018, 03:09 PM
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#2
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Established Member
Join Date: Aug 2018
Location: Zanesville
Posts: 21
M.O.C. #22373
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Rich,
I have a 2018 3721FL and they had are two rear tank valves mislabeled. The black tank valve went to grey tank and grey valve went to black tank.
We had to switch tank labels.
ohiocamp
2018 3731FL
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11-12-2018, 04:27 PM
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#3
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Montana Master
Join Date: Jun 2018
Location: Carson City
Posts: 2,017
M.O.C. #21963
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Ohiocamp is probably right. Check the tank gauges and they may verify that.
Our trailer had the hydraulic slide controls mislabeled, the outdoor scare lights mislabeled, and the tv antenna cables mislabeled.
__________________
2016 3160, Legacy, Sailuns, Splendide 2100 xc vented, 1 1/2" axle lift blocks, disk brakes. 2014 Ram 3500 SRW SWB 4X4 6.7 Aisin Mega Cab, EBC slotted disks and brakes, Titan fuel tank.
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11-12-2018, 04:42 PM
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#4
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Established Member
Join Date: Jun 2018
Location: Miami
Posts: 11
M.O.C. #21932
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Thanks, ohiocamp...
That would make sense, and something we never thought of. Going to check and see if that's the case, it seems to be a pretty commonly occurring problem.
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11-12-2018, 05:25 PM
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#5
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New Member
Join Date: Sep 2018
Location: St. Paul
Posts: 9
M.O.C. #22684
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There's been a discussion going on with the same problem (or similar). You probably already know that there are two gray tank valves, only one is in the convenience center. No one told me about this when we got ours in late September.
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11-12-2018, 07:10 PM
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#6
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Established Member
Join Date: Jun 2018
Location: Miami
Posts: 11
M.O.C. #21932
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Yeah... we came across the second one up front by accident, as you said, it's not in the literature and no one told us about it either...
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11-13-2018, 08:08 AM
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#7
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Montana Master
Join Date: Dec 2009
Location: Sebring
Posts: 3,659
M.O.C. #9969
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Dealers can't tell you things that they don't have a clue about. We had that same hidden pull handle on our 2010 2955RL and didn't know it was there until visiting a different Dealer and saw it on a unit in their Show Room.
__________________
Michelle & Ann
2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.
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11-13-2018, 09:01 AM
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#8
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Montana Master
Join Date: Jun 2018
Location: Carson City
Posts: 2,017
M.O.C. #21963
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Did anyone wonder why there were two grey tank level indicators?
__________________
2016 3160, Legacy, Sailuns, Splendide 2100 xc vented, 1 1/2" axle lift blocks, disk brakes. 2014 Ram 3500 SRW SWB 4X4 6.7 Aisin Mega Cab, EBC slotted disks and brakes, Titan fuel tank.
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11-13-2018, 09:06 AM
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#9
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Montana Master
Join Date: Jul 2010
Location: Lake Havasu City AZ.
Posts: 1,811
M.O.C. #10552
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I know why just in case the first one is wrong you can comfort with the second one. Every body knows that. LOL
__________________
Wayne and Ann Moore
2015 Ford F-350 King Ranch
Firestone air bags, bed saver.
Add 40 GAL tank in bed.
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11-13-2018, 10:15 AM
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#10
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Montana Master
Join Date: Oct 2017
Location: Bastrop
Posts: 2,892
M.O.C. #20753
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Had a SOB TT 2 gray tanks, 2 gauges, 1 pull lever. And no the gauges did not read the same level
__________________
Mocha, one-eyed toothless, hurricane survivor, Pirate dog
2019 20th Anniversary Edition 3701LK
B&W 20K for Ford OEM Puck
2018 Ford F-350 Lariat CCLB PSD DRW KJ5CQH
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11-13-2018, 11:32 AM
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#11
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Montana Master
Join Date: Sep 2017
Location: Tacoma
Posts: 1,567
M.O.C. #20475
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Quote:
Originally Posted by Montana Man
Did anyone wonder why there were two grey tank level indicators?
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You have two grey indicators because you have two grey tanks one shower & bath and one galley tank!
__________________
Bob & Carol Washington St
2017 HC HM352RL 2018 Dodge 3500 laramie CC LB 4x4
Curt Q25 with puck system, Factory air bags
Happy Trails
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11-13-2018, 12:39 PM
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#12
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Montana Master
Join Date: Oct 2017
Location: Trinidad, TX
Posts: 506
M.O.C. #20746
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I always pull the galley tank valve open as soon as we set up. That way I only have to worry about 2 tank levels.
__________________
2018 Ram 3500 Laramie Longhorn 4X4 Dually Cummins Aisin CC LB / B&W Companion hitch
50 Gallon Transfer Flow in bed tank w/ Trax 3
2018 Montana 3121RL
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11-13-2018, 04:14 PM
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#13
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Montana Master
Join Date: Jan 2005
Location: North Ridgeville
Posts: 20,229
M.O.C. #2839
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You have got a second gray tank and pull handle you have not yet found.
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11-18-2018, 02:13 PM
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#14
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Seasoned Camper
Join Date: Aug 2018
Location: San Antonio
Posts: 67
M.O.C. #22453
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Quote:
Originally Posted by RichLP
Hi again all,
We've got a 2019 Montana 3731FL, and something seemingly odd is happening.
When we've taken a few showers, the shower drain stops draining, and water sits in the drainpan. BUT, when we pull the grey tank drain, the water doesn't drain out. Only after pulling the black tank drain does it go down. We even had it happen with the grey tank valve left open!
Any ideas why this might be happening?
Thanks in advance,
Rich
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Valves were mislabeled on my 2019 3731 also. I didn't realized there was a 2nd gray water valve until the level sensor showed full but I knew I had the one gray valve open but the level was not dropping. Another commentor said his slide switches were mislabeled - mine has no labels and one slide switch out of the 4 does nothing.
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11-18-2018, 02:17 PM
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#15
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Seasoned Camper
Join Date: Aug 2018
Location: San Antonio
Posts: 67
M.O.C. #22453
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I found that out the hard way on my 2019 3731 on its first trip. I went to a private landowner's lot on a lake. I was going to drain the grey water to help water his lawn. Needless to say, I spent the next hour so cleaning up black water waste out of his yard.
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11-18-2018, 02:26 PM
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#16
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New Member
Join Date: Aug 2013
Location: Battle Ground
Posts: 6
M.O.C. #13659
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Perfect example of (poor quality control) and (mostly non existent) PDI (especially in regards to the DWV Piping and operation
(Prevalent in the RV industry). “Personal rant” based on 20+ years of experience” with 4 manufactures of class A, ClassC and current Montana 5th wheel
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11-18-2018, 04:10 PM
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#17
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Montana Master
Join Date: Jan 2018
Location: Northville, NY
Posts: 807
M.O.C. #21158
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Quote:
Originally Posted by ohiocamp
Rich,
I have a 2018 3721FL and they had are two rear tank valves mislabeled. The black tank valve went to grey tank and grey valve went to black tank.
We had to switch tank labels.
ohiocamp
2018 3731FL
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We had the same problem with ours. I just relabeled the handles.
__________________
Jim B
2017 Lariat F-350 FX4, CC, SB, 6.7 PSD 4WD
2018 MONTY 3731FL, at our private winter site in GA
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11-18-2018, 05:10 PM
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#18
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Seasoned Camper
Join Date: Oct 2018
Location: Grand Blanc
Posts: 72
M.O.C. #22765
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We also have a 2019 3731FL and had the same issue. My husband checked outside while I was in the shower and figured out the labels were backwards. Thank goodness for an easy fix!
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11-18-2018, 07:40 PM
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#19
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Established Member
Join Date: Sep 2018
Location: Gardner
Posts: 33
M.O.C. #22623
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I put a valve at the drain outlet so I can leave the hard-to-reach galley valve open all the time and just open the main valve as soon as I hook up to on-site sewer or dump station.
__________________
Bill Price
2013 3100RL
2007 Ford F350 diesel
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11-18-2018, 08:10 PM
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#20
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Montana Master
Join Date: Jun 2018
Location: Carson City
Posts: 2,017
M.O.C. #21963
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Quote:
Originally Posted by cghsatx
I found that out the hard way on my 2019 3731 on its first trip. I went to a private landowner's lot on a lake. I was going to drain the grey water to help water his lawn. Needless to say, I spent the next hour so cleaning up black water waste out of his yard.
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That is funny, and not funny. I would send Keystone a bill for the trouble based upon their willful negligence.
__________________
2016 3160, Legacy, Sailuns, Splendide 2100 xc vented, 1 1/2" axle lift blocks, disk brakes. 2014 Ram 3500 SRW SWB 4X4 6.7 Aisin Mega Cab, EBC slotted disks and brakes, Titan fuel tank.
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