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Thread: Fernco or FluidMaster floor seal

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  1. #1

    Default Fernco or FluidMaster floor seal

    Thanks for having such a helpful forum. We are replacing a broken toilet with the Toto UltraMax after laying vinyl over quarter inch plywood. The flange is a bit below the flooring surface and we are trying to decide which type of seal would be easiest, safest to use, double wax, Fernco or the FluidMaster. I did read Terry's instructions for attaching the seal to the toilet rather than the floor. Since it seems they narrow the pipe a little, do the rubber seals have any affect on the flushing action of the toilet? What would you suggest we use.
    Thanks
    Yankee Senior

  2. #2
    Retired Defense Industry Engineer jadnashua's Avatar
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    The interior trap on most toilets is in the order of 2" or a little over. Some are larger. The diameter of the waxless seals is probably not a restriction. I've had several in for years, and no issues. It would have been best to reset the flange on top of the finished floor where it is supposed to be. You could add an extender ring to bring it up, then use a standard wax ring.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  3. #3

    Default fernco or fluidmaster

    I had to replace two toilets with wax rings. Replaced wax rings about every 7
    years. Replaced wax rings with fluidmaster waxless. Steps taken to use fluidmaster.

    1 Removed cast iron flanges rusted.

    2 Replaced flooring water damage.

    3 Used stainless steel ring with brass bolts.

    4 Alined bolts to center of 4 inch cast iron drain.

    5 Drilled wood dowels turned to fit slot width of toilet 1/4 inch dia. holes 1 inch deep slid dowels over bolts.

    6 Pressed fluidmaster into 4 inch pipe so that seal was about 3/4 inch above floor.

    7 Lifted toilet over dowels and set toilet down on seal. The toilet then shoved the seal down to tight fit on top of seal because I used an o-ring with tight fit into drain. No need to use crush paper.
    The logic behind this install was that my father in law said all you need to know to be a plumber is that feces and urine stink and water flows down hill.

    I checked to see if there was any water leakage by removing one nut on one side of toilet and shoved a dry rag strip into space between horn and edge of toilet came out dry.

    Hope this helps some one.
    leo the lion

  4. #4
    Master Plumber Redwood's Avatar
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    I would install a flange spacer ring to bring the flange up to the right height.

    I use wax myself...

  5. #5

    Default fluidmaster weaxless

    Cast iron flanges rusted out bolts would not hold and flanges too high would mash wax ring before toilet seated on floor.

    After replacing wax rings for 42 years got tired of leaks. Also could smell urine around toilet.

    leo the lion

  6. #6
    Master Plumber Redwood's Avatar
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    Toilets smelling of urine is more often caused by bad aim than anything else. Yellow water diluted with 1.6 gallons of water usually does not smell.

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