Dometic model 300 odor problem and replacement

[nomad297]

Originally Posted by nomad297

This thread has been here for so long and I have never read it from the beginning to here.

It is obvious to me that the Dometic 300 toilet is a bad product that allows smells to get into the camper, but I haven’t come across the post in this thread that explains what, exactly, the problem is. What is it about this toilet that causes the problem everybody has with it?

Bruce

I found this video on YouTube. The guy does a very good job of explaining what the root problem is. He fixed his 300 instead of replacing it. I am pretty sure I would replace it if I had one.

Bruce

https://youtu.be/71squwXaGNU

[BAJAG]

I was blaming the piss smell on everyone from the dog to anyone that ever went into our bathroom. After reading this post and I called Dometic Customer Service at 800-321-9886 and spoke to Ann who was very helpful. I gave her the serial number (Have that handy when you call) which is under the foot valve and she said that the gasket was pinched at installation on our model 300 toilet...and the smell is coming from the plastic bottom of the toilet. Ann gave me several options and I decided to upgrade and ordered a new 310 with the anti slam seat for $75.00 yesterday and it will be here Thursday. . so..... I went out and disconnected the water supply unbolted the floor flange and lifted the toilet out. There was about 1/2 gal of pee in the bottom and the smell was horrendous. Lesson learned.....read before you place blame!! Poor Dog....

[Cindybee]

Originally Posted by BAJAG

I was blaming the piss smell on everyone from the dog to anyone that ever went into our bathroom. After reading this post and I called Dometic Customer Service at 800-321-9886 and spoke to Ann who was very helpful. I gave her the serial number (Have that handy when you call) which is under the foot valve and she said that the gasket was pinched at installation on our model 300 toilet...and the smell is coming from the plastic bottom of the toilet. Ann gave me several options and I decided to upgrade and ordered a new 310 with the anti slam seat for $75.00 yesterday and it will be here Thursday. . so..... I went out and disconnected the water supply unbolted the floor flange and lifted the toilet out. There was about 1/2 gal of pee in the bottom and the smell was horrendous. Lesson learned.....read before you place blame!! Poor Dog....

Agree !!!!

[Biolerdad]

We decided to replace & upgrade to 320 model. As we were getting ready to dispose we also had at least half gallon of yellow liquid come out of old toilet. I would join the group that says replace if domestic won’t fix problem with their product.

[beechjet16mf]

Some of us can't upgrade, as we don't have the clearance behind the toilet. The 310,320 series need another 1" behind them that we don't have in our Flagstaff 27 RLWS trailer. We are now on our fourth Dometic 300 toilet. Talk about frustrating.

[Cindybee]

They told us they had fixed the problem! So far our season one is good but the creaky sounds it makes, like it’s going to break any minute, is driving us crazy.

[Cindybee]

Originally Posted by beechjet16mf

Some of us can't upgrade, as we don't have the clearance behind the toilet. The 310,320 series need another 1" behind them that we don't have in our Flagstaff 27 RLWS trailer. We are now on our fourth Dometic 300 toilet. Talk about frustrating.

This would be frustrating!

[fortwilderness]

I just called today as this is the second 300 that we are having replaced. We have chosen to get the upgrade 310 (they didn’t offer the upgrade last time) Does anyone know if the plumbing is the same or do we need to modify? Thanks!!!

[rk06382]

Originally Posted by fortwilderness

I just called today as this is the second 300 that we are having replaced. We have chosen to get the upgrade 310 (they didn’t offer the upgrade last time) Does anyone know if the plumbing is the same or do we need to modify? Thanks!!!

I upgraded to a Dometic 320. Plumbing and floor flange are the same. Difference is in the distance to the back wall.


Dimensions of the 300,310,320 flange. Dometic 300-320 installation_manual_55249.pdf


Before: My old Dometic 300 toilet with a gape in the back.

After: My new Dometic 320 toilet is touching the wall. I also installed a no-slam toilet seat.

We love our Dometic 320 toilet.

[fortwilderness]

Thank you for your help. We were worried about the water connection would not match.

[BAJAG]

Originally Posted by fortwilderness

Thank you for your help. We were worried about the water connection would not match.

Water connection is the same...its the top portion of the 310 or 320 that requires more clearance to the back wall. The FR3 30ds I have would accommodate either. I chose the 310 model with anti slam wooden seat. $75 from Dometic.

[cavie]

I have never delt with an RV toilet since mine works well but Is there any reason an offset floor flange won't solve the wall clearance issue with the 320?

[Cindybee]

Unreal! Ours seems to be doing ok since we replaced it but crackles when you sit on it like it’s falling apart!

[kk5fe]

Same with mine.... I have a 300 toilet in our trailer. Developed the nasty smell on the last trip. I thought it was coming from the black tank even though I keep it as clean as I can. I did some research on the toilet and found this thread and a couple others. Amazing that it’s still happening.
I called Dometic who were extremely nice and helpful. Explained the issue and I got the 310 as an upgrade for $50. Could have gotten another 300 for nothing and was assured that the ones coming out of the plant now will not have that issue.
However I’m not so sure that would be the case. I think it would be better to have the nicer bowl anyway.

[Cindybee]

We got a replacement and it’s fine but wish i had upgraded but they didn’t offer one. My lady wasn’t very nice. She just stopped me and offered replacement.

[Cindybee]

Originally Posted by Cindybee

We got a replacement and it’s fine but wish i had upgraded but they didn’t offer one. My lady wasn’t very nice. She just stopped me and offered replacement.

would like to have porcelain.

[jlkrantz]

we had the same problem with our Dometic 300 toilet. I called Dometic they were great to deal with. We had a replacement toilet in 2 days at no charge.

[Cindybee]

Glad you upgraded. The plastic toilet sounds like it’s breaking!

[mack63]

We just had a bad urine smell during our two week trip in our 2019 Forest River. This tread answered my questions to why cleaning the toilet and everything near it did no good. Looked through the opening in the back and sure enough there was urine in the bottom compartment. Called Dometic and they said our serial number was after they changed their manufacturing process to fix the issue. They agreed to upgrade me to a 310 for $50. Great customer service but clearly there’s still an issue with the 300.

[kk5fe]

Originally Posted by mack63

We just had a bad urine smell during our two week trip in our 2019 Forest River. This tread answered my questions to why cleaning the toilet and everything near it did no good. Looked through the opening in the back and sure enough there was urine in the bottom compartment. Called Dometic and they said our serial number was after they changed their manufacturing process to fix the issue. They agreed to upgrade me to a 310 for $50. Great customer service but clearly there’s still an issue with the 300.

You’ll love the 310. I did the same thing.... I received the new toilet in about three days I think. Took about 20 minutes to swap it out. Everything lined up perfectly. Be very careful when removing the old one and taking it out of your camper. Don’t want that stuff sloshing around.