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07-01-2021, 10:27 AM
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#1
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Junior Member
Join Date: Jun 2018
Location: Hoover
Posts: 10
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toilet replacement help
Our 2018 Bullet Crossfire 2200BH came with a Dometic 300 toilet that has never held water. We bought a Dometic 310 to replace it (I really want porcelain). When we tried to install it last weekend,the new toilet is a hair too long to fit in the space--the base will not go flush to the floor. I looked at the dimensions on instruction manuals for the 2 models and see that there is 1/4" difference in space from wall to center of floor opening. Anyone got a suggestion as to how we can retrofit the floor opening to be able to install the new toilet? It is so close to working, but if we move the floor flange forward 1/4" will the screw holes be too close to the old ones to hold and will the "hole" still be in the right place to install the new toilet without leaks? Hopefully the photos will load.
Thanks in advance for any suggestions!
Martha
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07-01-2021, 10:40 AM
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#2
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Site Team
Join Date: Jul 2014
Location: Modesto
Posts: 20,326
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Moving the floor flange may cause the drain not to line up with the tank causing worse issues. In some cases you just need to fix what you have.
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2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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07-01-2021, 12:35 PM
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#3
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Site Team
Join Date: Feb 2014
Location: W. Texas
Posts: 17,676
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The depth from wall to center of the drain cutout on the 300 is 8.5", the 310 is 10" and the 320 is 11". If you don't have the room from the wall to the cutout short of replacing the floor I'm not sure you can "mod" that existing hole 1 1/2" further out without having a lot of leakage from around the floor seal on the toilet.
Here's an excerpt from a response I made in a different thread;
"Here's a link to that information. The one I pulled up previously was much larger print but on page 2, figure 3, item A it shows the different rough in dimensions for the different models."
https://www.manualslib.com/manual/19...?page=2#manual
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Danny and Susan, wife of 56 years
2019 Ram 3500 Laramie CC SWB SB 6.4 4x4 4.10
2020 Montana High Country 331RL
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07-01-2021, 02:01 PM
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#4
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Site Team
Join Date: Mar 2011
Location: Gaylord
Posts: 26,984
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You have two choices as I see the problem...
One is to return the 310 and exchange it for a 300 that will fit the space.
The other, not a good choice IMHO, is to rework the floor and/or the wall so the larger toilet will fit the space....
I'd opt to replace the 300 with a 300 and just don't scratch the interior of the plastic bowl.
__________________
John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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07-01-2021, 04:48 PM
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#5
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Senior Member
Join Date: Apr 2019
Location: Henniker
Posts: 2,141
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The issue with the floor is that the toilet floor flange threads onto the black tank, and the flange is screwed to the floor. You can’t move the black tank, so you can’t move the floor flange. What’s left is either move the wall or get a different toilet. For the effort and cost, I would go back with the 300.
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Rob & Amy
2019 Passport 240BH SL (current)
2024 Cougar 29BHL (on order, originally due late April, then pushed to early May, now pushed to early June). Thinking of Plan B at this point
2022 Ford F250 7.3L Godzilla Crew Cab FX4
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07-01-2021, 06:42 PM
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#6
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Senior Member
Join Date: Dec 2019
Location: Fort Thomas
Posts: 339
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Could it be angled a little? Or cut some off the back of the toilet? Not sure if ether would work, just a thought.
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2020 Keystone Passport GT 2521RL 30 FT.
Blue Ox Sway Pro WDH 1000 LBS Bars.
2016 GMC Sierra SLE 1500 4X4 All Terrain V8 5.3
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07-01-2021, 06:48 PM
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#7
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Site Team
Join Date: Feb 2014
Location: W. Texas
Posts: 17,676
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All of my 310s have had a porcelain back that would be what hit the wall. Angling the toilet due to lack of distance would surely give you some nice "flow" from the toilet into the bathroom due to the seal not securing.
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Danny and Susan, wife of 56 years
2019 Ram 3500 Laramie CC SWB SB 6.4 4x4 4.10
2020 Montana High Country 331RL
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07-02-2021, 02:49 AM
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#8
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Senior Member
Join Date: Oct 2014
Location: Germantown, TN
Posts: 6,328
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If you are hell-bent to have the 310 (Yes, it is a nicer commode) the only semi-reasonable answer is to cut into the wall. And of course you would want to make sure you had space enough for the lid to stay up when lifted.
Avoid at all costs 'tilting' the commode or some jerry-rig maneuver to match the mounting plate with the commode.
Keep us up on your actions.
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Jim in Memphis, Wife of 51 years is Brenda
2019 F450 6.7 Powerstroke
2018 Mobile Suites 40RSSA
2021 40' Jayco Eagle
2001 Road king w/matching Harley sidecar
2021 Yamaha X2 Wolverine 1000
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07-02-2021, 04:46 AM
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#9
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Senior Member
Join Date: Apr 2012
Location: Portland, OR
Posts: 4,218
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Quote:
Originally Posted by notanlines
If you are hell-bent to have the 310 (Yes, it is a nicer commode) the only semi-reasonable answer is to cut into the wall. And of course you would want to make sure you had space enough for the lid to stay up when lifted.
Avoid at all costs 'tilting' the commode or some jerry-rig maneuver to match the mounting plate with the commode.
Keep us up on your actions.
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X2!
I agree the porcelain bowl is very nice, I would carefully modify the wall behind.
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Russ & Paula and Belle the Beagle.
2016 Ram Laramie 3500 DRW 14,000# GVWR (New TV)
2005 Copper Canyon 293 FWSLS 32’ GVWR 12,360
Visit and enjoy Oregon State Parks
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07-02-2021, 05:20 AM
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#10
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Senior Member
Join Date: Nov 2017
Location: Picacho, Az
Posts: 6,809
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Just remember these ARE NOT 2x4 studded walls! Check what's on the other side of that wall before you cut, you could possibly have the toilet sticking out into the next room.
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Full-timed 10+ years
Sold '13 Redwood FB
Traded '13 GMC Denali DRW D/A
Replacement undetermined
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07-02-2021, 05:22 AM
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#11
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Senior Member
Join Date: Sep 2019
Location: Florissant
Posts: 700
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Quote:
Originally Posted by chuckster57
Moving the floor flange may cause the drain not to line up with the tank causing worse issues. In some cases you just need to fix what you have.
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There is a youtube video on how to repair/replace the seal. It doesn’t look difficult.
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Skids
2019 Bullet 248RKS
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07-02-2021, 05:54 AM
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#12
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Senior Member
Join Date: Apr 2012
Location: Portland, OR
Posts: 4,218
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Quote:
Originally Posted by travelin texans
Just remember these ARE NOT 2x4 studded walls! Check what's on the other side of that wall before you cut, you could possibly have the toilet sticking out into the next room.
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While that is true most are 1-1/2” thick, some 3/4”, creating a recess in the wall may be all that is needed, to get the room for the toilet to fit.
__________________
Russ & Paula and Belle the Beagle.
2016 Ram Laramie 3500 DRW 14,000# GVWR (New TV)
2005 Copper Canyon 293 FWSLS 32’ GVWR 12,360
Visit and enjoy Oregon State Parks
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07-02-2021, 06:30 AM
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#13
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Senior Member
Join Date: Dec 2019
Location: Fort Thomas
Posts: 339
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Is the piece on the back of the toilet that is touching the wall made of plastic or ceramic?
Can it be removed or cut down?
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2020 Keystone Passport GT 2521RL 30 FT.
Blue Ox Sway Pro WDH 1000 LBS Bars.
2016 GMC Sierra SLE 1500 4X4 All Terrain V8 5.3
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07-02-2021, 07:07 AM
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#14
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Senior Member
Join Date: Nov 2017
Location: Mico, TX
Posts: 7,454
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Wow... While there might be no such thing as a "stupid question" there are some answers that fit that category. PORCELIN. TOO BIG. Have this guy cut the wall on a 2018 camper for the toilet to fit? TOILET TOO BIG; TAKE BACK and use original 300.
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wiredgeorge Mico TX
2006 F350 CC 4WD 6.0L
2002 Keystone Cougar 278
2006 GL1800 Roadsmith Trike
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07-02-2021, 07:22 AM
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#15
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Site Team
Join Date: Mar 2011
Location: Gaylord
Posts: 26,984
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Quote:
Originally Posted by wiredgeorge
Wow... While there might be no such thing as a "stupid question" there are some answers that fit that category. PORCELIN. TOO BIG. Have this guy cut the wall on a 2018 camper for the toilet to fit? TOILET TOO BIG; TAKE BACK and use original 300.
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X2 !!!!!
We're talking about a travel trailer with, if the OP is lucky, has 3" of space between the toilet flange and the black tank fitting. THERE IS NO WAY TO EASILY RECONFIGURE 2" IN A 3" PLUMBING RUN.... If he was working with a fifth wheel where the toilet is in the upper deck, maybe there'd be enough space to reconfigure the floor/plumbing run. NOT ON A TRAVEL TRAILER (without changing black tank fittings and/or replacing the black tank to accommodate the changed configuration of the opening.
If I were to start cutting walls where my DW's butt sits when on the toilet, I'm positive she would not be a "happy camper"....
There is really no way to "cut porcelain", so trying to modify the toilet is not an option.....
Like George said, "TOILET TOO BIG; TAKE BACK and use original 300"
ADDED: Or just hang it on the wall and pretend it's a urinal....
__________________
John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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07-02-2021, 07:33 AM
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#16
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Senior Member
Join Date: Aug 2012
Location: Waco, Tx
Posts: 5,457
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Quote:
Originally Posted by JRTJH
X2 !!!!!
We're talking about a travel trailer with, if the OP is lucky, has 3" of space between the toilet flange and the black tank fitting. THERE IS NO WAY TO EASILY RECONFIGURE 2" IN A 3" PLUMBING RUN.... If he was working with a fifth wheel where the toilet is in the upper deck, maybe there'd be enough space to reconfigure the floor/plumbing run. NOT ON A TRAVEL TRAILER (without changing black tank fittings and/or replacing the black tank to accommodate the changed configuration of the opening.
If I were to start cutting walls where my DW's butt sits when on the toilet, I'm positive she would not be a "happy camper"....
There is really no way to "cut porcelain", so trying to modify the toilet is not an option.....
Like George said, "TOILET TOO BIG; TAKE BACK and use original 300"
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In my old Passport '12 I had the same issue if I remember correctly I unscrewed the flange from the floor and rotated it slightly then screwed it back down with the same screws.. but that's been 7 years and a stroke ago..
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2015 Ford F350 DRW 6.7 Diesel XL
2020 Avalanche 313 RS
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07-02-2021, 07:34 AM
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#17
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Senior Member
Join Date: Dec 2019
Location: Fort Thomas
Posts: 339
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Sorry just tying to offer some suggestions for a fellow camper. For what it's worth the 300 isn't worth the plastic it is made from...
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2020 Keystone Passport GT 2521RL 30 FT.
Blue Ox Sway Pro WDH 1000 LBS Bars.
2016 GMC Sierra SLE 1500 4X4 All Terrain V8 5.3
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07-02-2021, 08:41 AM
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#18
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Senior Member
Join Date: Nov 2017
Location: Mico, TX
Posts: 7,454
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Thinking out of the box now that the OP has had a chance to consider the distance from the wall... https://www.thetford.com/products/toilets/rv-toilets/
We had an ORIGINAL (2002 camper) Aqua Magic and it was like sitting on a plastic bucket; not amendable for the male anatomy! Perhaps one of these newer gen toilets would be the answer based on their clearance. The hyperbole Thetford uses to describe these toilets is remarkable!
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wiredgeorge Mico TX
2006 F350 CC 4WD 6.0L
2002 Keystone Cougar 278
2006 GL1800 Roadsmith Trike
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07-02-2021, 11:17 AM
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#19
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Junior Member
Join Date: Jun 2018
Location: Hoover
Posts: 10
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Amen Gobird38- definitely not worth the plastic! Thanks for the comments all--the distance by which the flange is off is only 1/4 inch--not more than an inch as some have indicated or I never would have asked the question. Wall behind the toilet could be cut out--we have looked, but it is not worth the effort. Not sure why the comment about the scratched bowl--we do not have that problem. The toilet has never held water in the bowl and on the last two trips there has been seepage around the base and we could not identify the source, so we wanted to replace. Guess will return it and just stick with what we have. Thanks for those who offered serious replies.
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07-02-2021, 12:16 PM
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#20
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Senior Member
Join Date: Dec 2019
Location: Fort Thomas
Posts: 339
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Quote:
Originally Posted by Wisetraverls4
Amen Gobird38- definitely not worth the plastic! Thanks for the comments all--the distance by which the flange is off is only 1/4 inch--not more than an inch as some have indicated or I never would have asked the question. Wall behind the toilet could be cut out--we have looked, but it is not worth the effort. Not sure why the comment about the scratched bowl--we do not have that problem. The toilet has never held water in the bowl and on the last two trips there has been seepage around the base and we could not identify the source, so we wanted to replace. Guess will return it and just stick with what we have. Thanks for those who offered serious replies.
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I am having the same problem out of my 300. On our last trip is when it happened, very bad smell. I am planning on replacing mine this weekend, I haven't measured it yet, hope a 310 will fit, if not I will seal all gaskets on the new 300 before I install it.
__________________
2020 Keystone Passport GT 2521RL 30 FT.
Blue Ox Sway Pro WDH 1000 LBS Bars.
2016 GMC Sierra SLE 1500 4X4 All Terrain V8 5.3
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