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02-26-2022, 10:29 AM
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#1
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Seasoned Camper
Join Date: Aug 2017
Location: Williamsburg
Posts: 61
M.O.C. #20311
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Dometic 310/320 toilet info
Hello all,
Getting ready to replace our current Thedford toilet. I want to install the Dometic 320. When researching the numerous choices I noticed that the Dometic toilet has had a number of complaints of leaking inside the base from the seal that is used where the bowl connects to the base. Evidently most all people encountering this issue noticed water on floor seeping from the inside of base at floor. Bottom line was that water was dripping from the gasket at bowl and stand and was dripping down base to floor.
I decided on the Dometic because of the recommendations on this site. I just want to know if anyone on this forum has had this issue if so how did you fix it.
Thanks in advance for your reply
John Susan
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John and Susan & Virtus (Our Jack Russell) 2017 Montana 3661RL 2014 FORD 250 SUPERDUTY 6.7L 4X4 PLATINUM
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02-26-2022, 11:45 AM
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#2
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,428
M.O.C. #4831
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Four of us installed the Dometic 320s four years ago all at one time. Todate, none of us have had any issue with seals leaking (or anything else). Best toilet going IMO.
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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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02-26-2022, 12:39 PM
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#3
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Montana Master
Join Date: Jun 2017
Location: Northern Illinois
Posts: 525
M.O.C. #19994
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Installed mine a couple years ago, no problems with it
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The "Black Pearl"-2017 3731FL Legacy Package
2017 F-450 Platinum, 6.7 PSD
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02-26-2022, 01:11 PM
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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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We had Dometic 320 units in 2 different Montanas covering 8 years of full time use and NEVER a leak or any other problem. Be sure to get the sprayer!
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2018.5 Montana 3791RD
Full Timers 9/1/2010 through 1/16/2020.
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02-26-2022, 07:34 PM
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#5
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Seasoned Camper
Join Date: Aug 2017
Location: Williamsburg
Posts: 61
M.O.C. #20311
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Thanks to all for all the feedback. Just confirmed my decision to buy the Dometic 320. I will install next week.
Thanks for the input
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John and Susan & Virtus (Our Jack Russell) 2017 Montana 3661RL 2014 FORD 250 SUPERDUTY 6.7L 4X4 PLATINUM
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02-26-2022, 07:53 PM
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#6
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Montana Master
Join Date: Apr 2006
Location: Mesa az
Posts: 2,971
M.O.C. #5651
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I installed one 5 or 6 years ago and no problems. I added the sprayer head and a shutoff valve also. The sprayer makes it easy to clean up the toilet and the shutoff allows one to clean the gasket without shutting off water to the whole house.
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Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
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02-27-2022, 10:29 AM
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#7
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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Over 12 years of full timing we've only had a water problem once and that was on a new toilet. Dometic had some bad valves and it was no problem to get a replacement valve from them.
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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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02-27-2022, 10:46 AM
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#8
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Montana Master
Join Date: Feb 2008
Location: woodstock
Posts: 545
M.O.C. #8174
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Your right for that the 320 is great
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Ed
Montana Master
Woodstock Ga
2020 3931 FB Legacy
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03-02-2022, 02:28 PM
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#9
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Montana Fan
Join Date: Dec 2020
Location: Full Timer
Posts: 119
M.O.C. #27665
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Quote:
Originally Posted by WeBeFulltime
We had Dometic 320 units in 2 different Montanas covering 8 years of full time use and NEVER a leak or any other problem. Be sure to get the sprayer!
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We love ours, and we agree get the sprayer. I had leaks from the teeny tiny factory supplied toilet…our 320 with spray has been perfect.
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Full-Timing since 2018 in a 2013 3625RE, 2023 Ford F450DRW with High Output Diesel,
Custom kingpin-mounted hitch receiver for bike rack 2019
MorRyde I/S with 8K Axles & Goodyear G114 Tires on 17.5” aluminum wheels 2020
FlexArmor roof 2021, Starlink
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03-02-2022, 06:04 PM
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#10
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Montana Fan
Join Date: Oct 2004
Location: San Jose
Posts: 390
M.O.C. #2277
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12 years with a 320
Our SOB (some other brand) has had a 320 in it since the day we bought it. I assume it was the original toilet so it's 16 years old!
In the time we've had it I've replaced the spud gasket twice and the bowl to pedestal gasket 4 times. If I had stuck to original Dometic/Thetford parts there would have been only 2 bowl gaskets.
So here's my advice. Don't buy cheap knock off parts. Even though working on the toilet is relatively easy it's still not a job you want to do often.
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03-02-2022, 06:09 PM
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#11
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Montana Master
Join Date: Apr 2006
Location: Mesa az
Posts: 2,971
M.O.C. #5651
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Also, I hooked up the hose and shutoff valve with Shark bite connectors. I had never used them before, but spent the big bucks and got the tool that both connects and removes the connectors. Made it super easy.
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Tom and Gail
2013 Mountaineer 362
2012 Silverado 2500
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03-05-2022, 07:42 AM
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#12
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Montana Master
Join Date: Jan 2018
Location: Northville, NY
Posts: 811
M.O.C. #21158
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We replaced our Thetford with the 320 as soon as the foot valve began to stick. Thetford is notorious for that. Used the Sharkbite shut off valve with flex line to connect it. We have a hand sprayer in the shower right beside it so we didn't get the sprayer but would recommend it to others.
I may replace the seat with one that has soft landing though.
Very happy with this upgrade.
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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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03-16-2022, 02:44 AM
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#13
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Montana Fan
Join Date: May 2019
Location: Lakewood
Posts: 392
M.O.C. #24110
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I have my Dometic 320 out in my garage now that I order I'm waiting on the sprayer to be install with it, I think that this will be one of the best mod I did since I install a washer & dryer.
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2023 Jayco North Point 310RLTS
2022 GMC Denali Ultimate DRW
Retired Army MSG
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03-16-2022, 09:00 AM
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#14
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 2,291
M.O.C. #30417
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Can a residential soft close seat be used on the 320?
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Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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03-16-2022, 12:28 PM
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#15
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Montana Fan
Join Date: May 2019
Location: Lakewood
Posts: 392
M.O.C. #24110
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Yes, I'm planning on doing it.
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2023 Jayco North Point 310RLTS
2022 GMC Denali Ultimate DRW
Retired Army MSG
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03-17-2022, 02:21 PM
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#16
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Montana Master
Join Date: Jan 2018
Location: Northville, NY
Posts: 811
M.O.C. #21158
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Quote:
Originally Posted by Foldbak
Can a residential soft close seat be used on the 320?
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Yes, I just put one on Saturday. Purchased at Lowe's, standard residential and it fits perfectly.
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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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03-18-2022, 08:31 AM
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#17
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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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We full time and the dw uses the facility nonstop the aqua flood let go so we went with a 320 then it leaked at the foot pedal. then it was replaced as that part is not fixable. The second made it 2 years then it failed again and again the foot pedal leak ( NOT CAUSED BY THE WATER VALVE). It was leaking through the shaft. so whats next. back to the aqua flood. I dont think so. so we went with a thetford aura deluxe 2. electric. been installed for the last 4 years and no problems at all. Just had to install a 12 volt electric to the toilet.
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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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03-21-2022, 02:16 AM
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#18
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Montana Fan
Join Date: May 2019
Location: Lakewood
Posts: 392
M.O.C. #24110
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Quote:
Originally Posted by DebNJim B
Yes, I just put one on Saturday. Purchased at Lowe's, standard residential and it fits perfectly.
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I did the same thing I have it on my 320 in the box waiting to get our 5th wheel back from the dealer.
__________________
2023 Jayco North Point 310RLTS
2022 GMC Denali Ultimate DRW
Retired Army MSG
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05-22-2023, 08:06 AM
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#19
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New Member
Join Date: May 2023
Location: Lehighton
Posts: 3
M.O.C. #32767
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Dometic 310 leak SOLVED
I was having occasional leaks of clear water around the base of our Dometic 310 toilet. I wasn't seeing it happen every time and it would go days without a leak and then all of a sudden I'd find a "Disney Water Show On The Floor"! Close inspections around the base found nothing until this morning...
I woke up to find a small amount of clear water around the base so I decided have a 24 hour stake-out. I sat there and flushed repeatedly until I found the answer...
The jets are VERY close to the top of the bowl rim. At one point, one jet at the very front of the bowl shot water UP at an angle, causing a small amount of clear water to spill over onto the floor. a-HA! I cleaned the jet with a Q-tip cut in half. I think a small amount of FOD (Foreign Object Debris) or mineral deposit was deflecting the jet stream. I cleaned the other jets and saw no more "Disney Water Shows".
I consider the issue closed BUT I may look into a flow-reducer in the toilet-only water line as the pressure at our campsite is high (I don't want to add a regulator for the entire 5th wheel at this time).
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05-22-2023, 09:44 AM
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#20
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Site Team
Join Date: Sep 2017
Location: Oro Valley
Posts: 3,959
M.O.C. #20477
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Jim,
If your park has high water pressure you need to use a pressure regulator or risk leaks and damage to your water system.
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Zack and Donna plus Millie and Ranger
2018 3160RL
"Life is too short to stay indoors, enjoy the ride!"
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