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09-06-2014, 08:01 AM
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#1
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Seasoned Camper
Join Date: Jan 2013
Location: Twin Falls
Posts: 50
M.O.C. #13130
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toilet seal leaking
I have seen this topic before but can not find info. Tried lubing the seal but the water still leaks out. what should I look for to stop the water from leaking out.
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09-06-2014, 09:28 AM
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#2
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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I have done everything including replacing the seal and have finally given up and just lift the handle with my foot when done flushing.
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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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09-06-2014, 10:21 AM
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#3
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Montana Master
Join Date: Aug 2010
Location: Washington Coast
Posts: 2,688
M.O.C. #10696
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My brand new 2015 Monty with a Thetford is leaking,my answer to that is CHUCK IT! like I am and buy the Dometic 310 or 320..... Problem Solved,on my 2012 Monty I just sold I had 2 Thetfords fail and bought the Dometic and did the next owner a favor
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09-06-2014, 10:41 AM
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#4
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Montana Master
Join Date: Sep 2013
Location: Pensacola (mail forward service)
Posts: 3,198
M.O.C. #13740
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I lubed to no avail, lifted the pedal for awhile. Two times I caught the toilet almost overflowing when it decided to let water into the bowl on its own. One time I didn't catch it and had water overflow. Went with Dometic 320. Think the 310 has a better bowl rinse when flushing, but as I was also installing a sprayer, it matters not to me. John
__________________
2012 F350 6.7 L dually, 2013 3800RE with 6 pt leveling, Sumitomo 17.5" load range h tires, Samsung 18 cu ft residential fridge, 8k Morryde I.S. with disc brakes. Full timing since 2012.
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09-06-2014, 01:41 PM
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#5
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Montana Master
Join Date: May 2011
Location: Hixson
Posts: 3,436
M.O.C. #11397
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I plan to change ours to Dometic 320 soon.
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2018.5 Montana 3791RD
Full Timers 9/1/2010 through 1/16/2020.
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09-06-2014, 04:06 PM
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#6
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Montana Master
Join Date: Feb 2012
Location: Lake Gaston
Posts: 8,773
M.O.C. #12156
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We had the same problem you describe. Replaced the seal and that took care of it. Unfortunately the flush mechanism is prone to failure and most swap out to the better engineered dometic 320. Having suffered thru the flush failures I will get rid of both thetfords in the 3910 while in Florida this winter and replace with dometic 320.
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Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
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09-07-2014, 11:05 AM
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#7
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,166
M.O.C. #6433
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Mine is a Sealand. Stopped holding water after about 3 yrs. Sealand advised remove the seal, clean it well, and lube with food quality oil such as Pam. Held fine for 4 yrs.
Started again this year. But rubber had hardened and cleaning/oiling did not help. Replaced the rubber seal and all is well again.
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Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
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09-08-2014, 02:56 AM
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#8
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Montana Master
Join Date: Jan 2006
Location: San Antonio
Posts: 1,298
M.O.C. #5165
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Replaced the seals in my Sealand this summer. Worked great for about 2 weeks--then slow leaks. Solution was to lub with Plumber's Silicon Grease! It is kind of thick and sticky--holds great and will not effect rubber! Gunk makes it. I put the lub on the ball and the rubber seal. I may need to replace the lub sometime in the future but I have solution!
__________________
F-250 King Ranch Crew Cab 2012, Single Wheel, 6.7 L Diesel, Transfer Flow Internal 50 Gallon Fuel Tank, Upgraded Ford Software for 50 Gallon tank, 2006 3475Rl with Mor-ryde King Pin, 2nd AC, 2nd Battery, Pressure Pro TPMS, Wet Bolt Shackle Kit
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09-14-2014, 10:42 AM
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#9
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Seasoned Camper
Join Date: Jul 2011
Location: Tomball
Posts: 83
M.O.C. #11565
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I had the same problem so after replacing the flush repair kit and still having major leaks I went to Lowe's and bought a house toilet that uses .8 a gallon to flush, has the stealth flush where pressure buildup from the water is contained in a bladder, has the oval shape which is easier on men, a cutoff valve for trailer plumbing and a 12 inch hose to connect the cutoff valve with the toilet. Got it all for about $161. and I have never been happier. Oh by the way, it has a flush button in the middle of the tank top, so no more foot flushing.
I hope this helps some folks solve their problem.
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09-21-2014, 05:42 AM
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#10
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Montana Master
Join Date: Oct 2012
Location:
Posts: 608
M.O.C. #12894
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You have to take the toilet apart which is very simple to do and separate the bowl from the flusher. It's only a couple of screws. The issue is the ball valve needs another 1/16th of an inch to fully seal. you can clearly see that when you take the unit apart. The fix is you need to shave down the plastic that the foot pedal rests up against when in the closed position. The plastic that needs to shaved is square looking and has a flat side that the foot pedal mechanism rests or stops up against.
Take a utility knife and start shaving or cutting it like slicing cheese until the valve closes the 16th of inch.
Since I've done this, I have not had any water leaking since the repair and I had the unit sitting for a couple of months.
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09-22-2014, 12:26 PM
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#11
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Seasoned Camper
Join Date: Jan 2013
Location: Twin Falls
Posts: 50
M.O.C. #13130
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Well I installed a new seal and so fare it is working
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09-27-2014, 02:15 PM
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#12
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Montana Master
Join Date: Aug 2009
Location: Grand Rapids
Posts: 1,896
M.O.C. #9561
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just ordering a new dometic 320. sick of this leaking seal on my toilet.
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10-04-2014, 12:05 PM
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#13
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Montana Master
Join Date: Oct 2012
Location:
Posts: 608
M.O.C. #12894
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Quote:
quote:Originally posted by mazboy
just ordering a new dometic 320. sick of this leaking seal on my toilet.
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So far my fix has been holding water for almost a year now. But now the china portion of the toilet is sliding back and forth. When I return home I will try and tighten it.
This WILL be the last fix, and as mazboy said I will be buying the Dometic.
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03-30-2015, 01:11 PM
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#14
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New Member
Join Date: May 2013
Location: Crestview
Posts: 1
M.O.C. #13422
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Our toilet was leaking as well as valve not totally closing and allowing water to slowly fill bowl. This was brought to my attention by DW when she sat down and the water was up to the seat. I used good ol' nlgi#2 to lube the seal and boy does it close fast & seals tight.
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