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12-26-2019, 07:51 AM
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#1
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Montana Master
Join Date: Nov 2013
Location: Willow Spring, NC
Posts: 992
M.O.C. #13909
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Dometic 320 toilet repair?
We have a Dometic 320 Toilet. I'm bring the RV out of winterized mode so I can travel on Friday. I noticed that when I turn on the pump and press lightly on the flush petal that I get a small leak around the petal area. If I press all the way down the leak stops.
I can do this a couple of times and it behaves the same, but from then on no leak at all, even lightly pressed.
I don't know if this is a cold weather issue or not. It's no freezing here and once the RV heats up I don't see any other water issues. I had everything winterized before and that includes blowing out the toilet line.
Anyone notice this issue and how did you fix it?
If I can limp thru the next week without having to do any major toilet work, I'd love to leave it alone.
__________________
Jim & Martha Abernathy
2014 Montana 3402RL Level UP, Sailun S637's, TST 507, 500W solar
2014 Ram 3500 Laramie® 4x2 diesel dually crew-cab 3.73 axle, Reese R20
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12-26-2019, 09:10 AM
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#2
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Montana Master
Join Date: Nov 2013
Location: Willow Spring, NC
Posts: 992
M.O.C. #13909
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Update: I talked with Dometic and they said that the only thing on that side of the toilet that can cause a leak is the water valve. They thought it was odd that it didn't leak all the time, not just when lightly pressed.
It turns out that the water valve is a snap in replacement. You just mash some tabs, remove, then disconnect the hoses. Hook the hoses to the new valve and snap it back in.
So I'm going to order a new water valve for $16.
__________________
Jim & Martha Abernathy
2014 Montana 3402RL Level UP, Sailun S637's, TST 507, 500W solar
2014 Ram 3500 Laramie® 4x2 diesel dually crew-cab 3.73 axle, Reese R20
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12-26-2019, 01:06 PM
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#3
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Montana Master
Join Date: Apr 2017
Location: 1000 oaks
Posts: 955
M.O.C. #19630
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My Dometic 320 lasted 9 months before I had to replace the leaking flush valve.
__________________
2011 2955RL Gen-Y Executive Kingpin
2022 GMC 2500HD Duramax/Alison
4X4 Crew Cab/Standard bed.
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12-27-2019, 05:15 AM
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#4
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Montana Master
Join Date: May 2011
Location: Hixson
Posts: 3,436
M.O.C. #11397
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Quote:
Originally Posted by prndl
My Dometic 320 lasted 9 months before I had to replace the leaking flush valve.
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Ours still going strong after 2 years 3 months full time use.
__________________
2018.5 Montana 3791RD
Full Timers 9/1/2010 through 1/16/2020.
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12-27-2019, 10:48 AM
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#5
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Established Member
Join Date: Mar 2019
Location: thonotosassa
Posts: 29
M.O.C. #23559
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Thx for that.....I have a 2009 MONTANA 5th wheel and my toilet leaks water exact same spot. I will need to buy a water valve...…..Do I need to remove the toliet ? from the floor? I hope not.....lol
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01-01-2020, 02:44 PM
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#6
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Montana Fan
Join Date: Aug 2012
Location: Fowler
Posts: 414
M.O.C. #12748
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Quote:
Originally Posted by zwma6@aol.com
Thx for that.....I have a 2009 MONTANA 5th wheel and my toilet leaks water exact same spot. I will need to buy a water valve...…..Do I need to remove the toliet ? from the floor? I hope not.....lol
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No, but it is a tight squeeze for someone no longer made of rubber. Check out youtube videos and you will be enlightened as to the process. The valve is about $20 on amazon.
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01-01-2020, 04:56 PM
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#7
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Montana Master
Join Date: Nov 2013
Location: Willow Spring, NC
Posts: 992
M.O.C. #13909
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Quote:
Originally Posted by zwma6@aol.com
Thx for that.....I have a 2009 MONTANA 5th wheel and my toilet leaks water exact same spot. I will need to buy a water valve...…..Do I need to remove the toliet ? from the floor? I hope not.....lol
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Keep in mind that the Dometic 320 is not the standard toilet in a Montana. If you have one you had to install it yourself.
__________________
Jim & Martha Abernathy
2014 Montana 3402RL Level UP, Sailun S637's, TST 507, 500W solar
2014 Ram 3500 Laramie® 4x2 diesel dually crew-cab 3.73 axle, Reese R20
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01-01-2020, 07:16 PM
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#8
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Montana Fan
Join Date: Jun 2012
Location: somerville
Posts: 135
M.O.C. #12636
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My mobile repair guys installed our 320 two years ago, never have had a problem with it.
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01-01-2020, 07:45 PM
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#9
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Montana Master
Join Date: Jun 2018
Location: Folsom, California
Posts: 553
M.O.C. #21903
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I've had my 310 for about 6 months. We are part timers. On current trip, ball flapper quit working, no flush!
The square shaft plastic piece that connects ball flapper to foot pedal broke. Fortunately I had a complete set of replacement parts from first delivery that was smashed upon arrival. Stripped all of the parts and am glad I carried them on this trip.
__________________
'05 F250 6.0 Bullet Proofed - Sold
'17 F350 6.7 Lariet
'02 Montana 3280RL Upgraded a bunch.
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01-02-2020, 02:19 PM
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#10
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Established Member
Join Date: Apr 2015
Location: Idaho Falls
Posts: 22
M.O.C. #17294
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Flush pedal broke with first use this winter, bought new toilet, should not have happened, toilet was one year old
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01-03-2020, 06:30 AM
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#11
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Montana Master
Join Date: Sep 2014
Location: Full Timer In Naples, Florida
Posts: 1,049
M.O.C. #15731
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ours started after 1 year to leak around the pedal when you pressed down to flush. The problem was the seal from the pedal shaft to the inside failed and the only recourse was a new toilet under warranty. but i will still take the dometic over the thetford any day.
__________________
2017, 3500 Ram Big Horn, 4x4, Crew Cab, DRW, Aisin Transmission, 4:10. Curt Q20, 2014 Mountaineer 331 RLT, Sailun's on the rv and truck.
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01-03-2020, 04:21 PM
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#12
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Montana Master
Join Date: Jan 2018
Location: Thornville
Posts: 546
M.O.C. #21110
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Monty Parks just posted the culprit and solution to this issue on the Facebook groups.
__________________
Darwin & Carla
2018.5 3701LK Montana
2022 3500HD Denali Duramax SRW
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01-05-2020, 09:50 AM
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#13
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Montana Master
Join Date: Jan 2016
Location: STAYTON
Posts: 1,118
M.O.C. #18157
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"If I press lightly on the flush petal that I get a small leak around the petal area... in the words of Archie Cambell...Well,don't do that!
__________________
“Hard times create strong men, strong men create good times, good times create weak men, and weak men create hard times.”
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01-22-2020, 08:18 PM
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#14
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Montana Master
Join Date: Apr 2016
Location: Auburn
Posts: 879
M.O.C. #18474
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Quote:
Originally Posted by CarWin
Monty Parks just posted the culprit and solution to this issue on the Facebook groups.
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Sorry I'm so late guys, but haven't been here but a few times and somehow missed this. Here is the part number and pic.
__________________
2020 Montana 3790RD Legacy EditionOnan, TST TPMS, TrailAir pin, Discs,
2013 F350 DRW 4x4 CC LBViair 10007, Ride-Rites, Westin HDx, 12k Smittybilt
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