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punomatic's avatar
punomatic
Explorer
Jun 10, 2017

Who was the genius...

...who designed the Dometic 300 series toilet? Our year old Whitewater Retro 195 began to smell like an outhouse. I figured it was a vent problem, but nothing I did seemed to help. DW said, "Could it be the seal between the toilet and the floor is leaking?" We had had that problem in our TC with an Aqua Magic toilet.

So, I decided to remove the toilet and see what shape the flange seal was in. I got the toilet out of the trailer and realized it was the toilet itself that smelled. It was worse than any odor the now open black tank was emitting. The flange seal was in good shape, BUT I discovered about a cup full of black water was trapped between the inner and outer bowl moldings.

When I got the whole thing disassembled, I discovered that there is an O-ring that is supposed to seal the inside bowl from the outer shell. It is square in cross section, and it is not compressed in any way. In fact the fit was so loose that the O-ring was twisted during installation at the factory, making the seal even less secure. It did have some silicone grease on it, but it obviously allowed black water to get out of the bowl and into the outer shell. Whew! Talk about a smell. Good thing I have a strong stomach.

I cleaned all the parts and put the toilet back together and installed it. It works fine, and the smell is gone, but I told DW if it starts to smell again, we'll toss it and get a different toilet. It makes me sad, because this toilet works better than any other we have had in an RV. It is just so poorly designed that it is truly unsanitary.

18 Replies

  • dougrainer wrote:
    Let me get this straight. Dometic makes hundreds of thousands of this model toilet. They are in scores of models. You have a DEFECTIVE one. So, you blame ALL the 300 toilets and the designer. Get a life. You fixed yours. Dometic sanitation have a 2 year warranty. If you go thru the proper procedure, they will replace your defective one. Doug


    I agree, this post from Doug, is unfriendly, and unwarranted! Yes Doug, you are often helpful/knowledgeable, but need to work on your demeanor a little.:W

    Jerry
  • Bill.Satellite wrote:
    bucky wrote:
    mike-s wrote:
    I think we just found out who designed it - Doug Rainer.


    As much help as Doug is on here let's not throw stones. The rest of us want his input. At least use a smiley face.


    Really? Why the smiley? I don't think he was trying to be funny. Some non-helpful posts need to be called out. RVing can be frustrating and I think it's OK to vent.


    Why was my post NOT helpful. I told him how to get a new toilet. Blaming Dometic for 1 in thousands is just ridiculous. Doug
  • bucky wrote:
    mike-s wrote:
    I think we just found out who designed it - Doug Rainer.


    As much help as Doug is on here let's not throw stones. The rest of us want his input. At least use a smiley face.


    Really? Why the smiley? I don't think he was trying to be funny. Some non-helpful posts need to be called out. RVing can be frustrating and I think it's OK to vent.
  • mike-s wrote:
    I think we just found out who designed it - Doug Rainer.


    As much help as Doug is on here let's not throw stones. The rest of us want his input. At least use a smiley face.
  • I think we just found out who designed it - Doug Rainer.
  • Let me get this straight. Dometic makes hundreds of thousands of this model toilet. They are in scores of models. You have a DEFECTIVE one. So, you blame ALL the 300 toilets and the designer. Get a life. You fixed yours. Dometic sanitation have a 2 year warranty. If you go thru the proper procedure, they will replace your defective one. Doug
  • He probably started out his life as an automotive engineer..........

    Bill