I am fixing up my house built in 1922. I had to replace my toilet and I see there was no flange. The two bolts were cemented into place which came loose.

The diamter of the sewer pipe was 3 3/4", which I thought was strange because I've only ever see 3" or 4". Do they make flanges 3 3/4"? Can't seem to locate one. Thanks!

For a collection of toilet flanges click on; Toilet Flanges from the most FAMOUS Internet PLUMBING SUPPLY The expansion flange looks like it would fill your bill. Good luck, Tom

Thanks for the reply. I'm still uncertain considering it says its 4", fitting that into my 3 3/4" sewer is the problem I've been having... I had then tried a 3" and that doesn't fit well and when the toilet wax ring and plastic guide tries to seat into the smaller flange, it doesn't fit well at all. Not sure if this expansion flange will fit or not.

Sewer pipes are either 3 or 4 inches Inside dimension. Go back andmeasure the pipe. If you're measuring a hub let me know but your pipe will be either 3 or 4 ". Let me know, Tom

I re-measured like 8 times -it is 3 3/4" without a doubt. Maybe since it was built in 1922 (not sure when that sewer pipe was in)? I tried to put in a 3" flange and that doesn't work (nothing holds it secure and the top part where the toilet fits in doesn't fit like it should-like if it was a normal 4" one. The plastic guide that sits in with the wax gets bent trying to force itself in a tighter spot). A tried gently tapping a 4" flange in only to start beating it in with a hammer for about a half hour only to have it bust away when it would not go in any further. Bizare...

Is this inside or out side measures? I wasn't around in 1922 but I started helping my Dad in 1942. Back then our drainage consisted of 4" cast iron for toilets and the main and 2" cast iron for the branches. If we had a 1 1/2" drain line we ran that in galvanized. Back then that was it. I can't even Google a 3 3/4" pipe for special order. Something just don't add up. In addition to his 40 man plumbing and heating shop he also owned Gateway Dupply. A plumbing supply house. Although there was 3 1/2" cast iron available my father never stocked it. In all the 50 some years I've been plumbing I've never ran into 3 3/4" ID cast iron. Get someone in that's familiar with plumbing and find out exactly what you have. It's not that I don't believe you King, it's just that I've worked on older homes amd never ran into it. Regards, Tom

It is quite perplexing, indeed. It is the inside dimensions... I showed my friend and he has construction experience and agreed it was 3 3/4 "... Frustrating but I'll do what you said. Thanks much.

James

What's the outside OD measure? Hang in there we'll figure it out yet. Tom