Which push-on closet flange will fit properly into a 3.5" cast iron pipe?

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NomicEnvy

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I'm remodeling a bathroom in a 1940's house, and I've come to the point of installing a new toilet flange. The pipe is cast iron with 4" OD, 3.5" ID. I've tried Oatey 3" and 4" twist-lock flanges - as one might expect, the 3" is too narrow to seal, and the 4" is too wide to fit. Before I explore opening the floor or jury-rigging something, I'd like to try finding a product out there that will fit properly - there must be something!

Can anyone recommend a product (available in Canada) for this? Thanks!
 

Mr tee

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I don't think you will find a push-in ring. You could caulk on a 4" ring with lead and oakum or you will have to change something under the floor.
 
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