Replacing Toilet

[Gfrenz]

The DW and I recently purchased a Montana 305FKS and want to replace the the toilet that came with it with a Domestic 310 series and was wondering if the floor plate is the same it came with a Thetford. any words of wisdom out there

[rhagfo]

Plate is the same, off set from wall is bigger, might check that, also a 320 has a larger bowl for men. I never stand in our rig to pee too much splash!

[chuckster57]

the floor flange should be universal. Several members have switched to the dometic and the only change is the routing of the supply line.

[JRTJH]

How old is that Montana 305FKS ???

Since around 2010 or 2011, all Montana trailers have had Dometic 310 or 320 toilets in them. I can't remember seeing a Montana without an "upgraded Dometic toilet"...

What is currently in your trailer and how old is the trailer ??? That will, for the most part, determine if there is enough room to install a Dometic in that space.

[sourdough]

Posting the year, model etc. of both the trailer and tow vehicle helps immensely with providing accurate information.

It looks like the Montana 305FKS might be around a 2001-2002 model? Non 5th wheel? If so, I did find pics of one and it did have a Thetford in it. Sort of offset in a corner?

These numbers are off the top of my head from memory the rough in for the Thetford is 8" from the back wall and the 310 is 10". You can pull the manuals for them and they show the distances from the back wall and the side walls. Lots of folks have made that upgrade without issue but you need to check. It also looks like(?) a 320 (elongated bowl) might fit but the cutout for it is 11".

[wiredgeorge]

Originally Posted by sourdough

Posting the year, model etc. of both the trailer and tow vehicle helps immensely with providing accurate information.

It looks like the Montana 305FKS might be around a 2001-2002 model? Non 5th wheel? If so, I did find pics of one and it did have a Thetford in it. Sort of offset in a corner?

These numbers are off the top of my head from memory the rough in for the Thetford is 8" from the back wall and the 310 is 10". You can pull the manuals for them and they show the distances from the back wall and the side walls. Lots of folks have made that upgrade without issue but you need to check. It also looks like(?) a 320 (elongated bowl) might fit but the cutout for it is 11".

https://www.beilsteincampersales.com...eer-305fks.php


A pretty nice floor plan. Looks to have an Aqua Magic installed as mine did. I had plenty of room for a Dometic 320 (tall) but can't tell much from the pic in the ad above. That camper has the same RCA stereo as was in my camper and not much worked anymore so replace with one (can't recall brand) of similar dimensions.

[sourdough]

Originally Posted by wiredgeorge

https://www.beilsteincampersales.com...eer-305fks.php


A pretty nice floor plan. Looks to have an Aqua Magic installed as mine did. I had plenty of room for a Dometic 320 (tall) but can't tell much from the pic in the ad above. That camper has the same RCA stereo as was in my camper and not much worked anymore so replace with one (can't recall brand) of similar dimensions.

I think that is the same link I used to look at the bathroom. The pic in the link "looks" like a Dometic would fit in there but without being on the floor with it I can't say for sure.

[wiredgeorge]

Originally Posted by sourdough

I think that is the same link I used to look at the bathroom. The pic in the link "looks" like a Dometic would fit in there but without being on the floor with it I can't say for sure.

I am pretty sure it is an Aqua Magic based on the flush handle mounted in the one oclock position; gray and recall having to bend over after using the toilet and stare in the scene of the crime while that handle was actuated. A brilliant design.