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08-01-2021, 08:41 PM
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#1
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Montana Master
Join Date: May 2005
Location: Fall Creek
Posts: 1,328
M.O.C. #3699
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Potty not holding water
Toilet was working fine all summer, all of a sudden it won't hold water in the bowel. I used some silicone grease on the rubber seal but did not help. Any suggestions?
Thanks.
__________________
Bob and Nancy Kassl Fall Creek, Wisconsin
2015 Montana 3440RL Legacy Edition, G614's, Pressure Pro TPMS, Dish Tailgaters
2016 GMC Sierra Denali 3500 CC SRW, Iridium Metallic, Duramax Allison Transmission
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08-01-2021, 08:46 PM
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#2
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Montana Master
Join Date: Jun 2018
Location: Folsom, California
Posts: 551
M.O.C. #21903
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Make sure the seal is properly seated.
__________________
'05 F250 6.0 Bullet Proofed - Sold
'17 F350 6.7 Lariet
'02 Montana 3280RL Upgraded a bunch.
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08-01-2021, 09:39 PM
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#3
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Montana Master
Join Date: Oct 2012
Location: Box Elder
Posts: 4,677
M.O.C. #12947
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If the toilet that isn't holding water is the original toilet, a Thetford, replace it with a Dometic 310 or 320. I replaced ours at least seven years ago with a 310, and still have all the original parts in it, including the seal, and it still holds water just like when new, and I have never had to lube it with anything, and we full time.
__________________
Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
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08-01-2021, 11:05 PM
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#4
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Site Team
Join Date: Aug 2007
Location: Omaha
Posts: 6,749
M.O.C. #7560
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Bob and Nancy-- I had the same problem and went to one of the dollar stores and found a stiff bristled ball shaped toilet brush I keep in the Monte. This brush just fits into the toilet exit hole and gasket with the bristles a little larger than the hole. When our toilet acts up like your has I just take that, I just take the brush and while the water is running into the toilet I brush the hole and gasket vigorously and turning the brush as I do this. This cleans the gasket as well as the pipe below the toilet. Just remember to hold onto the brush because if it falls into the pipe it will be quite difficult to get it out and you don't want it to go into the black tank. After cleaning the gasket and etc, I take an old tooth brush and put some plumbers grease all around on the gasket. This lubes the gasket and also creates a seal between the gasket and the toilet ball that seals the toilet bowl from the pipe. This process takes about 5 minutes and the cleaning and plumbers grease is good for at least two months. Also always remember to put water back into the toilet bowl after flushing or the gasket will dry out and will not seal. I always put some of the RV anti-freeze (pink stuff) in the bowl when winterizing the unit so the gasket will not dry out during the winter or non-use.
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08-02-2021, 02:49 PM
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#5
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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We used to have all kinds of fixes for this including replacing the seal. Over the years most of us found that nothing really worked until we replaced the Tetford with a Dometic.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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08-02-2021, 03:29 PM
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#6
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Seasoned Camper
Join Date: Feb 2019
Location: HOSCHTON
Posts: 80
M.O.C. #23386
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Mine went back to the dealer 3 times in about 90 days when new for not holding water. The last time they "fixed" it it held water but leaked around the base every time you depressed the flush valve, said it couldn't possibly be their fault. A Dometic solved the problem. Dealer lost a customer.
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08-03-2021, 09:05 AM
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#7
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Montana Master
Join Date: May 2005
Location: Fall Creek
Posts: 1,328
M.O.C. #3699
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What is the difference between a Dometic 310 and 320? I can get either?
Thanks
__________________
Bob and Nancy Kassl Fall Creek, Wisconsin
2015 Montana 3440RL Legacy Edition, G614's, Pressure Pro TPMS, Dish Tailgaters
2016 GMC Sierra Denali 3500 CC SRW, Iridium Metallic, Duramax Allison Transmission
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08-03-2021, 09:30 AM
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#8
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,323
M.O.C. #4831
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310 = round bowl
320 - elongated bowl
__________________
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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08-03-2021, 09:55 AM
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#9
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Seasoned Camper
Join Date: Jul 2019
Location: South Jordan, Utah
Posts: 67
M.O.C. #24453
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Quote:
Originally Posted by RKassl
What is the difference between a Dometic 310 and 320? I can get either?
Thanks
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The 320 is more compatible with a bidet if your so inclined to install one.
__________________
Dave & Marylee
2012 Moutaineer 324RLQ, 2016 Ram 3500 Laramie Megacab 4WD, Anderson Hitch, FTC40 Fuelbox, TruXport Tonneau Cover, DISH Tailgater, TST TPMS, Furrion camera system
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08-03-2021, 01:28 PM
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#10
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Montana Master
Join Date: Apr 2006
Location: Mesa az
Posts: 2,925
M.O.C. #5651
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In any case, when installing a Dometic, opt for the extra spray hose. I think it was less than $50 extra but is really handy to keep the toilet clean and to clean up around the gasket seal without getting too messy.
__________________
Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
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08-08-2021, 01:43 PM
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#11
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Montana Fan
Join Date: Apr 2019
Location: Long Isalnd
Posts: 135
M.O.C. #23929
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At the urging of the Montana owners members, I just replace my toilet with the Dometic 320. My original toilet only lasted 1 year before the seal failed. After having replaced the seal a few times in my last FW, the Dometic was the right choice.
__________________
Don and Kathleen
2019 Montana 3791RD 20th anniversary.
2014 Ram 3500 Dually CC, CTD, Aisin “Kasper”
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08-08-2021, 03:19 PM
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#12
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Montana Fan
Join Date: Sep 2018
Location: Orlando
Posts: 338
M.O.C. #22589
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Quote:
Originally Posted by Rondo
Bob and Nancy-- I had the same problem and went to one of the dollar stores and found a stiff bristled ball shaped toilet brush I keep in the Monte. This brush just fits into the toilet exit hole and gasket with the bristles a little larger than the hole. When our toilet acts up like your has I just take that, I just take the brush and while the water is running into the toilet I brush the hole and gasket vigorously and turning the brush as I do this. This cleans the gasket as well as the pipe below the toilet. Just remember to hold onto the brush because if it falls into the pipe it will be quite difficult to get it out and you don't want it to go into the black tank. After cleaning the gasket and etc, I take an old tooth brush and put some plumbers grease all around on the gasket. This lubes the gasket and also creates a seal between the gasket and the toilet ball that seals the toilet bowl from the pipe. This process takes about 5 minutes and the cleaning and plumbers grease is good for at least two months. Also always remember to put water back into the toilet bowl after flushing or the gasket will dry out and will not seal. I always put some of the RV anti-freeze (pink stuff) in the bowl when winterizing the unit so the gasket will not dry out during the winter or non-use.
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Me too!
__________________
2020 Montana 3813ms legacy w/Paint
2017 Ram 3500 4X4 DRW Aisin Curt Q-25
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08-08-2021, 03:50 PM
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#13
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New Member
Join Date: Sep 2019
Location: Kurtistown
Posts: 6
M.O.C. #24827
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Quote:
Originally Posted by RKassl
Toilet was working fine all summer, all of a sudden it won't hold water in the bowel. I used some silicone grease on the rubber seal but did not help. Any suggestions?
Thanks.
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If that is the Model 210, you need to get the seal replacement kit. Since the problem is the same as mine (and I used the provided tongue depressor to “rough up the seal three times), a RV tech told me it is easy —loosen the collar, remove the clam shell, replace the seal and reassemble. That I will do when I can.
PS Read the instructions that came with your unit as I skipped most.
Bob
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